The expanding fireball of Nova Delphini 2013.
Identifieur interne : 003286 ( PubMed/Corpus ); précédent : 003285; suivant : 003287The expanding fireball of Nova Delphini 2013.
Auteurs : G H Schaefer ; T. Ten Brummelaar ; D R Gies ; C D Farrington ; B. Kloppenborg ; O. Chesneau ; J D Monnier ; S T Ridgway ; N. Scott ; I. Tallon-Bosc ; H A Mcalister ; T. Boyajian ; V. Maestro ; D. Mourard ; A. Meilland ; N. Nardetto ; P. Stee ; J. Sturmann ; N. Vargas ; F. Baron ; M. Ireland ; E K Baines ; X. Che ; J. Jones ; N D Richardson ; R M Roettenbacher ; L. Sturmann ; N H Turner ; P. Tuthill ; G. Van Belle ; K. Von Braun ; R T Zavala ; D P K. Banerjee ; N M Ashok ; V. Joshi ; J. Becker ; P S MuirheadSource :
- Nature [ 1476-4687 ] ; 2014.
Abstract
A classical nova occurs when material accreting onto the surface of a white dwarf in a close binary system ignites in a thermonuclear runaway. Complex structures observed in the ejecta at late stages could result from interactions with the companion during the common-envelope phase. Alternatively, the explosion could be intrinsically bipolar, resulting from a localized ignition on the surface of the white dwarf or as a consequence of rotational distortion. Studying the structure of novae during the earliest phases is challenging because of the high spatial resolution needed to measure their small sizes. Here we report near-infrared interferometric measurements of the angular size of Nova Delphini 2013, starting one day after the explosion and continuing with extensive time coverage during the first 43 days. Changes in the apparent expansion rate can be explained by an explosion model consisting of an optically thick core surrounded by a diffuse envelope. The optical depth of the ejected material changes as it expands. We detect an ellipticity in the light distribution, suggesting a prolate or bipolar structure that develops as early as the second day. Combining the angular expansion rate with radial velocity measurements, we derive a geometric distance to the nova of 4.54 ± 0.59 kiloparsecs from the Sun.
DOI: 10.1038/nature13834
PubMed: 25363778
Links to Exploration step
pubmed:25363778Le document en format XML
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Ten Brummelaar</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Gies, D R" sort="Gies, D R" uniqKey="Gies D" first="D R" last="Gies">D R Gies</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Farrington, C D" sort="Farrington, C D" uniqKey="Farrington C" first="C D" last="Farrington">C D Farrington</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Kloppenborg, B" sort="Kloppenborg, B" uniqKey="Kloppenborg B" first="B" last="Kloppenborg">B. Kloppenborg</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Chesneau, O" sort="Chesneau, O" uniqKey="Chesneau O" first="O" last="Chesneau">O. Chesneau</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Monnier, J D" sort="Monnier, J D" uniqKey="Monnier J" first="J D" last="Monnier">J D Monnier</name><affiliation><nlm:affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Ridgway, S T" sort="Ridgway, S T" uniqKey="Ridgway S" first="S T" last="Ridgway">S T Ridgway</name><affiliation><nlm:affiliation>National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, Arizona 85719, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Scott, N" sort="Scott, N" uniqKey="Scott N" first="N" last="Scott">N. Scott</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Tallon Bosc, I" sort="Tallon Bosc, I" uniqKey="Tallon Bosc I" first="I" last="Tallon-Bosc">I. Tallon-Bosc</name><affiliation><nlm:affiliation>Université de Lyon; Université Lyon 1, Observatoire de Lyon, 9 avenue Charles André, 69230 Saint Genis Laval; CNRS UMR 5574, Centre de Recherche Astrophysique de Lyon; École Normale Supérieure, 69007 Lyon, France.</nlm:affiliation></affiliation></author><author><name sortKey="Mcalister, H A" sort="Mcalister, H A" uniqKey="Mcalister H" first="H A" last="Mcalister">H A Mcalister</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Boyajian, T" sort="Boyajian, T" uniqKey="Boyajian T" first="T" last="Boyajian">T. Boyajian</name><affiliation><nlm:affiliation>Department of Astronomy, Yale University, New Haven, Connecticut 06511, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Maestro, V" sort="Maestro, V" uniqKey="Maestro V" first="V" last="Maestro">V. Maestro</name><affiliation><nlm:affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Sydney, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Mourard, D" sort="Mourard, D" uniqKey="Mourard D" first="D" last="Mourard">D. Mourard</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Meilland, A" sort="Meilland, A" uniqKey="Meilland A" first="A" last="Meilland">A. Meilland</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Nardetto, N" sort="Nardetto, N" uniqKey="Nardetto N" first="N" last="Nardetto">N. Nardetto</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Stee, P" sort="Stee, P" uniqKey="Stee P" first="P" last="Stee">P. Stee</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Sturmann, J" sort="Sturmann, J" uniqKey="Sturmann J" first="J" last="Sturmann">J. Sturmann</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Vargas, N" sort="Vargas, N" uniqKey="Vargas N" first="N" last="Vargas">N. Vargas</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Baron, F" sort="Baron, F" uniqKey="Baron F" first="F" last="Baron">F. Baron</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Ireland, M" sort="Ireland, M" uniqKey="Ireland M" first="M" last="Ireland">M. Ireland</name><affiliation><nlm:affiliation>Research School of Astronomy and Astrophysics, Australian National University, Canberra, Australian Capital Territory 2611, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Baines, E K" sort="Baines, E K" uniqKey="Baines E" first="E K" last="Baines">E K Baines</name><affiliation><nlm:affiliation>Remote Sensing Division, Naval Research Laboratory, 4555 Overlook Avenue Southwest, Washington, DC 20375, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Che, X" sort="Che, X" uniqKey="Che X" first="X" last="Che">X. Che</name><affiliation><nlm:affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Jones, J" sort="Jones, J" uniqKey="Jones J" first="J" last="Jones">J. Jones</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Richardson, N D" sort="Richardson, N D" uniqKey="Richardson N" first="N D" last="Richardson">N D Richardson</name><affiliation><nlm:affiliation>Département de Physique and Centre de Recherche en Astrophysique du Québec (CRAQ), Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada.</nlm:affiliation></affiliation></author><author><name sortKey="Roettenbacher, R M" sort="Roettenbacher, R M" uniqKey="Roettenbacher R" first="R M" last="Roettenbacher">R M Roettenbacher</name><affiliation><nlm:affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Sturmann, L" sort="Sturmann, L" uniqKey="Sturmann L" first="L" last="Sturmann">L. Sturmann</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Turner, N H" sort="Turner, N H" uniqKey="Turner N" first="N H" last="Turner">N H Turner</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Tuthill, P" sort="Tuthill, P" uniqKey="Tuthill P" first="P" last="Tuthill">P. Tuthill</name><affiliation><nlm:affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Sydney, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Van Belle, G" sort="Van Belle, G" uniqKey="Van Belle G" first="G" last="Van Belle">G. Van Belle</name><affiliation><nlm:affiliation>Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, Arizona 86001, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Von Braun, K" sort="Von Braun, K" uniqKey="Von Braun K" first="K" last="Von Braun">K. Von Braun</name><affiliation><nlm:affiliation>Max Planck Institute for Astronomy (MPIA), Konigstuhl 17, 69117 Heidelberg, Germany.</nlm:affiliation></affiliation></author><author><name sortKey="Zavala, R T" sort="Zavala, R T" uniqKey="Zavala R" first="R T" last="Zavala">R T Zavala</name><affiliation><nlm:affiliation>United States Naval Observatory, Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, Arizona 86001, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Banerjee, D P K" sort="Banerjee, D P K" uniqKey="Banerjee D" first="D P K" last="Banerjee">D P K. Banerjee</name><affiliation><nlm:affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</nlm:affiliation></affiliation></author><author><name sortKey="Ashok, N M" sort="Ashok, N M" uniqKey="Ashok N" first="N M" last="Ashok">N M Ashok</name><affiliation><nlm:affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</nlm:affiliation></affiliation></author><author><name sortKey="Joshi, V" sort="Joshi, V" uniqKey="Joshi V" first="V" last="Joshi">V. Joshi</name><affiliation><nlm:affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</nlm:affiliation></affiliation></author><author><name sortKey="Becker, J" sort="Becker, J" uniqKey="Becker J" first="J" last="Becker">J. Becker</name><affiliation><nlm:affiliation>1] Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA [2] Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, California 91106, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Muirhead, P S" sort="Muirhead, P S" uniqKey="Muirhead P" first="P S" last="Muirhead">P S Muirhead</name><affiliation><nlm:affiliation>Department of Astronomy, Boston University, Boston, Massachusetts 02215, USA.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2014">2014</date><idno type="RBID">pubmed:25363778</idno><idno type="pmid">25363778</idno><idno type="doi">10.1038/nature13834</idno><idno type="wicri:Area/PubMed/Corpus">003286</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">003286</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">The expanding fireball of Nova Delphini 2013.</title><author><name sortKey="Schaefer, G H" sort="Schaefer, G H" uniqKey="Schaefer G" first="G H" last="Schaefer">G H Schaefer</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Ten Brummelaar, T" sort="Ten Brummelaar, T" uniqKey="Ten Brummelaar T" first="T" last="Ten Brummelaar">T. Ten Brummelaar</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Gies, D R" sort="Gies, D R" uniqKey="Gies D" first="D R" last="Gies">D R Gies</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Farrington, C D" sort="Farrington, C D" uniqKey="Farrington C" first="C D" last="Farrington">C D Farrington</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Kloppenborg, B" sort="Kloppenborg, B" uniqKey="Kloppenborg B" first="B" last="Kloppenborg">B. Kloppenborg</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Chesneau, O" sort="Chesneau, O" uniqKey="Chesneau O" first="O" last="Chesneau">O. Chesneau</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Monnier, J D" sort="Monnier, J D" uniqKey="Monnier J" first="J D" last="Monnier">J D Monnier</name><affiliation><nlm:affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Ridgway, S T" sort="Ridgway, S T" uniqKey="Ridgway S" first="S T" last="Ridgway">S T Ridgway</name><affiliation><nlm:affiliation>National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, Arizona 85719, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Scott, N" sort="Scott, N" uniqKey="Scott N" first="N" last="Scott">N. Scott</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Tallon Bosc, I" sort="Tallon Bosc, I" uniqKey="Tallon Bosc I" first="I" last="Tallon-Bosc">I. Tallon-Bosc</name><affiliation><nlm:affiliation>Université de Lyon; Université Lyon 1, Observatoire de Lyon, 9 avenue Charles André, 69230 Saint Genis Laval; CNRS UMR 5574, Centre de Recherche Astrophysique de Lyon; École Normale Supérieure, 69007 Lyon, France.</nlm:affiliation></affiliation></author><author><name sortKey="Mcalister, H A" sort="Mcalister, H A" uniqKey="Mcalister H" first="H A" last="Mcalister">H A Mcalister</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Boyajian, T" sort="Boyajian, T" uniqKey="Boyajian T" first="T" last="Boyajian">T. Boyajian</name><affiliation><nlm:affiliation>Department of Astronomy, Yale University, New Haven, Connecticut 06511, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Maestro, V" sort="Maestro, V" uniqKey="Maestro V" first="V" last="Maestro">V. Maestro</name><affiliation><nlm:affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Sydney, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Mourard, D" sort="Mourard, D" uniqKey="Mourard D" first="D" last="Mourard">D. Mourard</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Meilland, A" sort="Meilland, A" uniqKey="Meilland A" first="A" last="Meilland">A. Meilland</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Nardetto, N" sort="Nardetto, N" uniqKey="Nardetto N" first="N" last="Nardetto">N. Nardetto</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Stee, P" sort="Stee, P" uniqKey="Stee P" first="P" last="Stee">P. Stee</name><affiliation><nlm:affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</nlm:affiliation></affiliation></author><author><name sortKey="Sturmann, J" sort="Sturmann, J" uniqKey="Sturmann J" first="J" last="Sturmann">J. Sturmann</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Vargas, N" sort="Vargas, N" uniqKey="Vargas N" first="N" last="Vargas">N. Vargas</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Baron, F" sort="Baron, F" uniqKey="Baron F" first="F" last="Baron">F. Baron</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Ireland, M" sort="Ireland, M" uniqKey="Ireland M" first="M" last="Ireland">M. Ireland</name><affiliation><nlm:affiliation>Research School of Astronomy and Astrophysics, Australian National University, Canberra, Australian Capital Territory 2611, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Baines, E K" sort="Baines, E K" uniqKey="Baines E" first="E K" last="Baines">E K Baines</name><affiliation><nlm:affiliation>Remote Sensing Division, Naval Research Laboratory, 4555 Overlook Avenue Southwest, Washington, DC 20375, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Che, X" sort="Che, X" uniqKey="Che X" first="X" last="Che">X. Che</name><affiliation><nlm:affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Jones, J" sort="Jones, J" uniqKey="Jones J" first="J" last="Jones">J. Jones</name><affiliation><nlm:affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Richardson, N D" sort="Richardson, N D" uniqKey="Richardson N" first="N D" last="Richardson">N D Richardson</name><affiliation><nlm:affiliation>Département de Physique and Centre de Recherche en Astrophysique du Québec (CRAQ), Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada.</nlm:affiliation></affiliation></author><author><name sortKey="Roettenbacher, R M" sort="Roettenbacher, R M" uniqKey="Roettenbacher R" first="R M" last="Roettenbacher">R M Roettenbacher</name><affiliation><nlm:affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Sturmann, L" sort="Sturmann, L" uniqKey="Sturmann L" first="L" last="Sturmann">L. Sturmann</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Turner, N H" sort="Turner, N H" uniqKey="Turner N" first="N H" last="Turner">N H Turner</name><affiliation><nlm:affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Tuthill, P" sort="Tuthill, P" uniqKey="Tuthill P" first="P" last="Tuthill">P. Tuthill</name><affiliation><nlm:affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Sydney, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Van Belle, G" sort="Van Belle, G" uniqKey="Van Belle G" first="G" last="Van Belle">G. Van Belle</name><affiliation><nlm:affiliation>Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, Arizona 86001, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Von Braun, K" sort="Von Braun, K" uniqKey="Von Braun K" first="K" last="Von Braun">K. Von Braun</name><affiliation><nlm:affiliation>Max Planck Institute for Astronomy (MPIA), Konigstuhl 17, 69117 Heidelberg, Germany.</nlm:affiliation></affiliation></author><author><name sortKey="Zavala, R T" sort="Zavala, R T" uniqKey="Zavala R" first="R T" last="Zavala">R T Zavala</name><affiliation><nlm:affiliation>United States Naval Observatory, Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, Arizona 86001, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Banerjee, D P K" sort="Banerjee, D P K" uniqKey="Banerjee D" first="D P K" last="Banerjee">D P K. Banerjee</name><affiliation><nlm:affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</nlm:affiliation></affiliation></author><author><name sortKey="Ashok, N M" sort="Ashok, N M" uniqKey="Ashok N" first="N M" last="Ashok">N M Ashok</name><affiliation><nlm:affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</nlm:affiliation></affiliation></author><author><name sortKey="Joshi, V" sort="Joshi, V" uniqKey="Joshi V" first="V" last="Joshi">V. Joshi</name><affiliation><nlm:affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</nlm:affiliation></affiliation></author><author><name sortKey="Becker, J" sort="Becker, J" uniqKey="Becker J" first="J" last="Becker">J. Becker</name><affiliation><nlm:affiliation>1] Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA [2] Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, California 91106, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Muirhead, P S" sort="Muirhead, P S" uniqKey="Muirhead P" first="P S" last="Muirhead">P S Muirhead</name><affiliation><nlm:affiliation>Department of Astronomy, Boston University, Boston, Massachusetts 02215, USA.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Nature</title><idno type="eISSN">1476-4687</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A classical nova occurs when material accreting onto the surface of a white dwarf in a close binary system ignites in a thermonuclear runaway. Complex structures observed in the ejecta at late stages could result from interactions with the companion during the common-envelope phase. Alternatively, the explosion could be intrinsically bipolar, resulting from a localized ignition on the surface of the white dwarf or as a consequence of rotational distortion. Studying the structure of novae during the earliest phases is challenging because of the high spatial resolution needed to measure their small sizes. Here we report near-infrared interferometric measurements of the angular size of Nova Delphini 2013, starting one day after the explosion and continuing with extensive time coverage during the first 43 days. Changes in the apparent expansion rate can be explained by an explosion model consisting of an optically thick core surrounded by a diffuse envelope. The optical depth of the ejected material changes as it expands. We detect an ellipticity in the light distribution, suggesting a prolate or bipolar structure that develops as early as the second day. Combining the angular expansion rate with radial velocity measurements, we derive a geometric distance to the nova of 4.54 ± 0.59 kiloparsecs from the Sun.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">25363778</PMID><DateCreated><Year>2014</Year><Month>11</Month><Day>13</Day></DateCreated><DateCompleted><Year>2014</Year><Month>12</Month><Day>15</Day></DateCompleted><DateRevised><Year>2014</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1476-4687</ISSN><JournalIssue CitedMedium="Internet"><Volume>515</Volume><Issue>7526</Issue><PubDate><Year>2014</Year><Month>Nov</Month><Day>13</Day></PubDate></JournalIssue><Title>Nature</Title><ISOAbbreviation>Nature</ISOAbbreviation></Journal><ArticleTitle>The expanding fireball of Nova Delphini 2013.</ArticleTitle><Pagination><MedlinePgn>234-6</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1038/nature13834</ELocationID><Abstract><AbstractText>A classical nova occurs when material accreting onto the surface of a white dwarf in a close binary system ignites in a thermonuclear runaway. Complex structures observed in the ejecta at late stages could result from interactions with the companion during the common-envelope phase. Alternatively, the explosion could be intrinsically bipolar, resulting from a localized ignition on the surface of the white dwarf or as a consequence of rotational distortion. Studying the structure of novae during the earliest phases is challenging because of the high spatial resolution needed to measure their small sizes. Here we report near-infrared interferometric measurements of the angular size of Nova Delphini 2013, starting one day after the explosion and continuing with extensive time coverage during the first 43 days. Changes in the apparent expansion rate can be explained by an explosion model consisting of an optically thick core surrounded by a diffuse envelope. The optical depth of the ejected material changes as it expands. We detect an ellipticity in the light distribution, suggesting a prolate or bipolar structure that develops as early as the second day. Combining the angular expansion rate with radial velocity measurements, we derive a geometric distance to the nova of 4.54 ± 0.59 kiloparsecs from the Sun.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Schaefer</LastName><ForeName>G H</ForeName><Initials>GH</Initials><AffiliationInfo><Affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>ten Brummelaar</LastName><ForeName>T</ForeName><Initials>T</Initials><AffiliationInfo><Affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Gies</LastName><ForeName>D R</ForeName><Initials>DR</Initials><AffiliationInfo><Affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Farrington</LastName><ForeName>C D</ForeName><Initials>CD</Initials><AffiliationInfo><Affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kloppenborg</LastName><ForeName>B</ForeName><Initials>B</Initials><AffiliationInfo><Affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Chesneau</LastName><ForeName>O</ForeName><Initials>O</Initials><AffiliationInfo><Affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Monnier</LastName><ForeName>J D</ForeName><Initials>JD</Initials><AffiliationInfo><Affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ridgway</LastName><ForeName>S T</ForeName><Initials>ST</Initials><AffiliationInfo><Affiliation>National Optical Astronomy Observatory, 950 North Cherry Avenue, Tucson, Arizona 85719, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Scott</LastName><ForeName>N</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Tallon-Bosc</LastName><ForeName>I</ForeName><Initials>I</Initials><AffiliationInfo><Affiliation>Université de Lyon; Université Lyon 1, Observatoire de Lyon, 9 avenue Charles André, 69230 Saint Genis Laval; CNRS UMR 5574, Centre de Recherche Astrophysique de Lyon; École Normale Supérieure, 69007 Lyon, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>McAlister</LastName><ForeName>H A</ForeName><Initials>HA</Initials><AffiliationInfo><Affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Boyajian</LastName><ForeName>T</ForeName><Initials>T</Initials><AffiliationInfo><Affiliation>Department of Astronomy, Yale University, New Haven, Connecticut 06511, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Maestro</LastName><ForeName>V</ForeName><Initials>V</Initials><AffiliationInfo><Affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Sydney, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Mourard</LastName><ForeName>D</ForeName><Initials>D</Initials><AffiliationInfo><Affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Meilland</LastName><ForeName>A</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Nardetto</LastName><ForeName>N</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Stee</LastName><ForeName>P</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>Laboratoire Lagrange, UMR 7293, Université de Sophia-Antipolis (UNS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur (OCA), Boulevard de l'Observatoire, CS 34229, F-06304 Nice, Cedex 4, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Sturmann</LastName><ForeName>J</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Vargas</LastName><ForeName>N</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Baron</LastName><ForeName>F</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ireland</LastName><ForeName>M</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Research School of Astronomy and Astrophysics, Australian National University, Canberra, Australian Capital Territory 2611, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Baines</LastName><ForeName>E K</ForeName><Initials>EK</Initials><AffiliationInfo><Affiliation>Remote Sensing Division, Naval Research Laboratory, 4555 Overlook Avenue Southwest, Washington, DC 20375, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Che</LastName><ForeName>X</ForeName><Initials>X</Initials><AffiliationInfo><Affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Jones</LastName><ForeName>J</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, PO Box 5060, Atlanta, Georgia 30302, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Richardson</LastName><ForeName>N D</ForeName><Initials>ND</Initials><AffiliationInfo><Affiliation>Département de Physique and Centre de Recherche en Astrophysique du Québec (CRAQ), Université de Montréal, CP 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Roettenbacher</LastName><ForeName>R M</ForeName><Initials>RM</Initials><AffiliationInfo><Affiliation>Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Sturmann</LastName><ForeName>L</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Turner</LastName><ForeName>N H</ForeName><Initials>NH</Initials><AffiliationInfo><Affiliation>The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, California 91023, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Tuthill</LastName><ForeName>P</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>Sydney Institute for Astronomy, School of Physics, University of Sydney, New South Wales 2006, Sydney, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>van Belle</LastName><ForeName>G</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, Arizona 86001, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>von Braun</LastName><ForeName>K</ForeName><Initials>K</Initials><AffiliationInfo><Affiliation>Max Planck Institute for Astronomy (MPIA), Konigstuhl 17, 69117 Heidelberg, Germany.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zavala</LastName><ForeName>R T</ForeName><Initials>RT</Initials><AffiliationInfo><Affiliation>United States Naval Observatory, Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, Arizona 86001, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Banerjee</LastName><ForeName>D P K</ForeName><Initials>DP</Initials><AffiliationInfo><Affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ashok</LastName><ForeName>N M</ForeName><Initials>NM</Initials><AffiliationInfo><Affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Joshi</LastName><ForeName>V</ForeName><Initials>V</Initials><AffiliationInfo><Affiliation>Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Becker</LastName><ForeName>J</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>1] Department of Astronomy, University of Michigan, 941 Dennison Building, Ann Arbor, Michigan 48109, USA [2] Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, California 91106, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Muirhead</LastName><ForeName>P S</ForeName><Initials>PS</Initials><AffiliationInfo><Affiliation>Department of Astronomy, Boston University, Boston, Massachusetts 02215, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>10</Month><Day>26</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Nature</MedlineTA><NlmUniqueID>0410462</NlmUniqueID><ISSNLinking>0028-0836</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2014</Year><Month>05</Month><Day>13</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2014</Year><Month>09</Month><Day>03</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>11</Month><Day>4</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>11</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>11</Month><Day>5</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId 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