A frozen super-Earth orbiting a star at the bottom of the main sequence
Identifieur interne : 004D04 ( PascalFrancis/Curation ); précédent : 004D03; suivant : 004D05A frozen super-Earth orbiting a star at the bottom of the main sequence
Auteurs : D. Kubas [France, Chili] ; J. P. Beaulieu [France, Royaume-Uni] ; D. P. Bennett [États-Unis] ; A. Cassan [France] ; A. Cole [Australie] ; J. Lunine [Italie] ; J. B. Marquette [France] ; S. Dong [États-Unis] ; A. Gould [États-Unis] ; T. Sumi [Japon] ; V. Batista [France, États-Unis] ; P. Fouque [France] ; S. Brillant [Chili] ; S. Dieters [France, Australie] ; C. Coutures [France] ; J. Greenhill [Australie] ; I. Bond [Nouvelle-Zélande] ; T. Nagayama [Japon] ; A. Udalski [Pologne] ; E. Pompei [Chili] ; D. E. A. Nürnberger [Chili] ; J. B. Le Bouquin [Chili, France]Source :
- Astronomy and astrophysics : (Berlin. Print) [ 0004-6361 ] ; 2012.
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- Pascal (Inist)
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Abstract
Context. Microlensing is a unique method to probe low mass exoplanets beyond the snow line. However, the scientific potential of the new microlensing planet discovery is often unfulfilled due to lack of knowledge of the properties of the lens and source stars. The discovery light curve of the super Earth MOA-2007-BLG-192Lb suffers from significant degeneracies that limit what can be inferred about its physical properties. Aims. High resolution adaptive optics images allow us to solve this problem by resolving the microlensing target from all unrelated background stars, yielding the unique determination of magnified source and lens fluxes. This estimation permits the solution of our microlens model for the mass of the planet and its host and their physical projected separation. Methods. We observed the microlensing event MOA-2007-BLG-192 at high angular resolution in JHKs with the NACO adaptive optics system on the VLT while the object was still amplified by a factor 1.23 and then at baseline 18 months later. We analyzed and calibrated the NACO photometry in the standard 2MASS system in order to accurately constrain the source and the lens star fluxes. Results. We detect light from the host star of MOA-2007-BLG-192Lb, which significantly reduces the uncertainties in its characteristics as compared to earlier analyses. We find that MOA-2007-BLG-192L is most likely a very low mass late type M-dwarf (0.084+0.015-0.012 M◦.) at a distance of 660+100-70 pc orbited by a 3.2+5.2-1.8 M◦+ super-Earth at 0.66+0.51-0.22 AU. We then discuss the properties of this cold planetary system.
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Cole</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>University of Tasmania, School of Mathematics and Physics, Private Bag 37, GPO Hobart</s1><s2>Tas 7001</s2><s3>AUS</s3><sZ>5 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Lunine, J" sort="Lunine, J" uniqKey="Lunine J" first="J." last="Lunine">J. Lunine</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Dipartimento di Fisica, Universita degli Studi di Roma</s1><s3>ITA</s3><sZ>6 aut.</sZ></inist:fA14><country>Italie</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Tor Vergata"</s1><s2>Rome</s2><s3>ITA</s3><sZ>6 aut.</sZ></inist:fA14><country>Italie</country></affiliation></author><author><name sortKey="Marquette, J B" sort="Marquette, J B" uniqKey="Marquette J" first="J. B." last="Marquette">J. B. Marquette</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Dong, S" sort="Dong, S" uniqKey="Dong S" first="S." last="Dong">S. Dong</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Department of Astronomy, 610 Space Sciences Building, Cornell University</s1><s2>Ithaca, NY 14853</s2><s3>USA</s3><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>Sagan Fellow Institute for Advanced Study, Einstein Drive</s1><s2>Princeton, NJ 08540</s2><s3>USA</s3><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Gould, A" sort="Gould, A" uniqKey="Gould A" first="A." last="Gould">A. Gould</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>11 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Sumi, T" sort="Sumi, T" uniqKey="Sumi T" first="T." last="Sumi">T. Sumi</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Department of Earth and Space Science, Osaka University</s1><s2>Osaka 560-0043</s2><s3>JPN</s3><sZ>10 aut.</sZ></inist:fA14><country>Japon</country></affiliation></author><author><name sortKey="Batista, V" sort="Batista, V" uniqKey="Batista V" first="V." last="Batista">V. 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Fouque</name><affiliation wicri:level="1"><inist:fA14 i1="12"><s1>Observatoire Midi-Pyrénées, UMR 5572, 14 avenue Edouard Belin</s1><s2>31400 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Brillant, S" sort="Brillant, S" uniqKey="Brillant S" first="S." last="Brillant">S. Brillant</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Dieters, S" sort="Dieters, S" uniqKey="Dieters S" first="S." last="Dieters">S. Dieters</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>University of Tasmania, School of Mathematics and Physics, Private Bag 37, GPO Hobart</s1><s2>Tas 7001</s2><s3>AUS</s3><sZ>5 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Coutures, C" sort="Coutures, C" uniqKey="Coutures C" first="C." last="Coutures">C. Coutures</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Greenhill, J" sort="Greenhill, J" uniqKey="Greenhill J" first="J." last="Greenhill">J. Greenhill</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>University of Tasmania, School of Mathematics and Physics, Private Bag 37, GPO Hobart</s1><s2>Tas 7001</s2><s3>AUS</s3><sZ>5 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Bond, I" sort="Bond, I" uniqKey="Bond I" first="I." last="Bond">I. Bond</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Institute of Information and Mathematical Sciences, Massey University, Private Bag 102-904, North Shore Mail Centre</s1><s2>Auckland</s2><s3>NZL</s3><sZ>17 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country></affiliation></author><author><name sortKey="Nagayama, T" sort="Nagayama, T" uniqKey="Nagayama T" first="T." last="Nagayama">T. Nagayama</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>Department of Physics and Astrophysics, Faculty of Science, Nagoya University</s1><s2>Nagoya 464-8602</s2><s3>JPN</s3><sZ>18 aut.</sZ></inist:fA14><country>Japon</country></affiliation></author><author><name sortKey="Udalski, A" sort="Udalski, A" uniqKey="Udalski A" first="A." last="Udalski">A. Udalski</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Warsaw University Observatory. Al. Ujazdowskie 4</s1><s2>00-478 Warszawa</s2><s3>POL</s3><sZ>19 aut.</sZ></inist:fA14><country>Pologne</country></affiliation></author><author><name sortKey="Pompei, E" sort="Pompei, E" uniqKey="Pompei E" first="E." last="Pompei">E. Pompei</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Nurnberger, D E A" sort="Nurnberger, D E A" uniqKey="Nurnberger D" first="D. E. A." last="Nürnberger">D. E. A. Nürnberger</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Le Bouquin, J B" sort="Le Bouquin, J B" uniqKey="Le Bouquin J" first="J. B." last="Le Bouquin">J. B. Le Bouquin</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Laboratoire d'Astrophysique de Grenoble, UMR 5571 Université Joseph Fourier/CNRS, BP 53</s1><s2>38051 Grenoble</s2><s3>FRA</s3><sZ>22 aut.</sZ></inist:fA14><country>France</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">12-0314126</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 12-0314126 INIST</idno><idno type="RBID">Pascal:12-0314126</idno><idno type="wicri:Area/PascalFrancis/Corpus">001213</idno><idno type="wicri:Area/PascalFrancis/Curation">004D04</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">A frozen super-Earth orbiting a star at the bottom of the main sequence</title><author><name sortKey="Kubas, D" sort="Kubas, D" uniqKey="Kubas D" first="D." last="Kubas">D. Kubas</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Beaulieu, J P" sort="Beaulieu, J P" uniqKey="Beaulieu J" first="J. P." last="Beaulieu">J. P. Beaulieu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>University College of London, Deparment of Physics and Astronomy, Gower Street</s1><s2>London, WC1E 6BT</s2><s3>GBR</s3><sZ>2 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Bennett, D P" sort="Bennett, D P" uniqKey="Bennett D" first="D. P." last="Bennett">D. P. Bennett</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>University of Notre Dame, Department of Physics, 225 Nieuwland Science Hall Notre Dame</s1><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Cassan, A" sort="Cassan, A" uniqKey="Cassan A" first="A." last="Cassan">A. Cassan</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Cole, A" sort="Cole, A" uniqKey="Cole A" first="A." last="Cole">A. Cole</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>University of Tasmania, School of Mathematics and Physics, Private Bag 37, GPO Hobart</s1><s2>Tas 7001</s2><s3>AUS</s3><sZ>5 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Lunine, J" sort="Lunine, J" uniqKey="Lunine J" first="J." last="Lunine">J. Lunine</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Dipartimento di Fisica, Universita degli Studi di Roma</s1><s3>ITA</s3><sZ>6 aut.</sZ></inist:fA14><country>Italie</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Tor Vergata"</s1><s2>Rome</s2><s3>ITA</s3><sZ>6 aut.</sZ></inist:fA14><country>Italie</country></affiliation></author><author><name sortKey="Marquette, J B" sort="Marquette, J B" uniqKey="Marquette J" first="J. B." last="Marquette">J. B. Marquette</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Dong, S" sort="Dong, S" uniqKey="Dong S" first="S." last="Dong">S. Dong</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Department of Astronomy, 610 Space Sciences Building, Cornell University</s1><s2>Ithaca, NY 14853</s2><s3>USA</s3><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>Sagan Fellow Institute for Advanced Study, Einstein Drive</s1><s2>Princeton, NJ 08540</s2><s3>USA</s3><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Gould, A" sort="Gould, A" uniqKey="Gould A" first="A." last="Gould">A. Gould</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>11 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Sumi, T" sort="Sumi, T" uniqKey="Sumi T" first="T." last="Sumi">T. Sumi</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Department of Earth and Space Science, Osaka University</s1><s2>Osaka 560-0043</s2><s3>JPN</s3><sZ>10 aut.</sZ></inist:fA14><country>Japon</country></affiliation></author><author><name sortKey="Batista, V" sort="Batista, V" uniqKey="Batista V" first="V." last="Batista">V. Batista</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>11 aut.</sZ></inist:fA14><country>États-Unis</country></affiliation></author><author><name sortKey="Fouque, P" sort="Fouque, P" uniqKey="Fouque P" first="P." last="Fouque">P. Fouque</name><affiliation wicri:level="1"><inist:fA14 i1="12"><s1>Observatoire Midi-Pyrénées, UMR 5572, 14 avenue Edouard Belin</s1><s2>31400 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Brillant, S" sort="Brillant, S" uniqKey="Brillant S" first="S." last="Brillant">S. Brillant</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Dieters, S" sort="Dieters, S" uniqKey="Dieters S" first="S." last="Dieters">S. Dieters</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>University of Tasmania, School of Mathematics and Physics, Private Bag 37, GPO Hobart</s1><s2>Tas 7001</s2><s3>AUS</s3><sZ>5 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Coutures, C" sort="Coutures, C" uniqKey="Coutures C" first="C." last="Coutures">C. Coutures</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Greenhill, J" sort="Greenhill, J" uniqKey="Greenhill J" first="J." last="Greenhill">J. Greenhill</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>University of Tasmania, School of Mathematics and Physics, Private Bag 37, GPO Hobart</s1><s2>Tas 7001</s2><s3>AUS</s3><sZ>5 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Bond, I" sort="Bond, I" uniqKey="Bond I" first="I." last="Bond">I. Bond</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Institute of Information and Mathematical Sciences, Massey University, Private Bag 102-904, North Shore Mail Centre</s1><s2>Auckland</s2><s3>NZL</s3><sZ>17 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country></affiliation></author><author><name sortKey="Nagayama, T" sort="Nagayama, T" uniqKey="Nagayama T" first="T." last="Nagayama">T. Nagayama</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>Department of Physics and Astrophysics, Faculty of Science, Nagoya University</s1><s2>Nagoya 464-8602</s2><s3>JPN</s3><sZ>18 aut.</sZ></inist:fA14><country>Japon</country></affiliation></author><author><name sortKey="Udalski, A" sort="Udalski, A" uniqKey="Udalski A" first="A." last="Udalski">A. Udalski</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Warsaw University Observatory. Al. Ujazdowskie 4</s1><s2>00-478 Warszawa</s2><s3>POL</s3><sZ>19 aut.</sZ></inist:fA14><country>Pologne</country></affiliation></author><author><name sortKey="Pompei, E" sort="Pompei, E" uniqKey="Pompei E" first="E." last="Pompei">E. Pompei</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Nurnberger, D E A" sort="Nurnberger, D E A" uniqKey="Nurnberger D" first="D. E. A." last="Nürnberger">D. E. A. Nürnberger</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation></author><author><name sortKey="Le Bouquin, J B" sort="Le Bouquin, J B" uniqKey="Le Bouquin J" first="J. B." last="Le Bouquin">J. B. Le Bouquin</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Chili</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Laboratoire d'Astrophysique de Grenoble, UMR 5571 Université Joseph Fourier/CNRS, BP 53</s1><s2>38051 Grenoble</s2><s3>FRA</s3><sZ>22 aut.</sZ></inist:fA14><country>France</country></affiliation></author></analytic><series><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title><title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title><idno type="ISSN">0004-6361</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title><title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title><idno type="ISSN">0004-6361</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adaptive optics</term><term>Adaptive systems</term><term>Degeneration</term><term>Extrasolar planets</term><term>Gravitational lensing</term><term>Light curves</term><term>Low-mass stars</term><term>Microlenses</term><term>Models</term><term>Orbits</term><term>Photometry</term><term>Physical properties</term><term>Planetary system</term><term>Uncertainty</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Microlentille</term><term>Planète extrasolaire</term><term>Courbe lumière</term><term>Dégénérescence</term><term>Propriété physique</term><term>Optique adaptative</term><term>Modèle</term><term>Système adaptatif</term><term>Photométrie</term><term>Incertitude</term><term>Orbite</term><term>Système planétaire</term><term>Etoile faible masse</term><term>Mirage gravitationnel</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Context. Microlensing is a unique method to probe low mass exoplanets beyond the snow line. However, the scientific potential of the new microlensing planet discovery is often unfulfilled due to lack of knowledge of the properties of the lens and source stars. The discovery light curve of the super Earth MOA-2007-BLG-192Lb suffers from significant degeneracies that limit what can be inferred about its physical properties. Aims. High resolution adaptive optics images allow us to solve this problem by resolving the microlensing target from all unrelated background stars, yielding the unique determination of magnified source and lens fluxes. This estimation permits the solution of our microlens model for the mass of the planet and its host and their physical projected separation. Methods. We observed the microlensing event MOA-2007-BLG-192 at high angular resolution in JHKs with the NACO adaptive optics system on the VLT while the object was still amplified by a factor 1.23 and then at baseline 18 months later. We analyzed and calibrated the NACO photometry in the standard 2MASS system in order to accurately constrain the source and the lens star fluxes. Results. We detect light from the host star of MOA-2007-BLG-192Lb, which significantly reduces the uncertainties in its characteristics as compared to earlier analyses. We find that MOA-2007-BLG-192L is most likely a very low mass late type M-dwarf (0.084<sup>+0.015</sup><sub>-0.012</sub> M<sub>◦.</sub>) at a distance of 660<sup>+100</sup><sub>-70</sub> pc orbited by a 3.2<sup>+5.2</sup><sub>-1.8</sub> M<sub>◦+</sub> super-Earth at 0.66<sup>+0.51</sup><sub>-0.22</sub> AU. We then discuss the properties of this cold planetary system.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0004-6361</s0></fA01><fA02 i1="01"><s0>AAEJAF</s0></fA02><fA03 i2="1"><s0>Astron. astrophys. : (Berl., Print)</s0></fA03><fA05><s2>540</s2></fA05><fA06><s3>p. 2</s3></fA06><fA08 i1="01" i2="1" l="ENG"><s1>A frozen super-Earth orbiting a star at the bottom of the main sequence</s1></fA08><fA11 i1="01" i2="1"><s1>KUBAS (D.)</s1></fA11><fA11 i1="02" i2="1"><s1>BEAULIEU (J. P.)</s1></fA11><fA11 i1="03" i2="1"><s1>BENNETT (D. P.)</s1></fA11><fA11 i1="04" i2="1"><s1>CASSAN (A.)</s1></fA11><fA11 i1="05" i2="1"><s1>COLE (A.)</s1></fA11><fA11 i1="06" i2="1"><s1>LUNINE (J.)</s1></fA11><fA11 i1="07" i2="1"><s1>MARQUETTE (J. B.)</s1></fA11><fA11 i1="08" i2="1"><s1>DONG (S.)</s1></fA11><fA11 i1="09" i2="1"><s1>GOULD (A.)</s1></fA11><fA11 i1="10" i2="1"><s1>SUMI (T.)</s1></fA11><fA11 i1="11" i2="1"><s1>BATISTA (V.)</s1></fA11><fA11 i1="12" i2="1"><s1>FOUQUE (P.)</s1></fA11><fA11 i1="13" i2="1"><s1>BRILLANT (S.)</s1></fA11><fA11 i1="14" i2="1"><s1>DIETERS (S.)</s1></fA11><fA11 i1="15" i2="1"><s1>COUTURES (C.)</s1></fA11><fA11 i1="16" i2="1"><s1>GREENHILL (J.)</s1></fA11><fA11 i1="17" i2="1"><s1>BOND (I.)</s1></fA11><fA11 i1="18" i2="1"><s1>NAGAYAMA (T.)</s1></fA11><fA11 i1="19" i2="1"><s1>UDALSKI (A.)</s1></fA11><fA11 i1="20" i2="1"><s1>POMPEI (E.)</s1></fA11><fA11 i1="21" i2="1"><s1>NÜRNBERGER (D. E. A.)</s1></fA11><fA11 i1="22" i2="1"><s1>LE BOUQUIN (J. B.)</s1></fA11><fA14 i1="01"><s1>Institut d'Astrophysique de Paris, UMR 7095 CNRS - Université Pierre & Marie Curie, 98 bis blv Arago</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>11 aut.</sZ><sZ>14 aut.</sZ><sZ>15 aut.</sZ></fA14><fA14 i1="02"><s1>European Southern Observatory, Casilla 19001, Vitacura 19</s1><s2>Santiago</s2><s3>CHL</s3><sZ>1 aut.</sZ><sZ>13 aut.</sZ><sZ>20 aut.</sZ><sZ>21 aut.</sZ><sZ>22 aut.</sZ></fA14><fA14 i1="03"><s1>University College of London, Deparment of Physics and Astronomy, Gower Street</s1><s2>London, WC1E 6BT</s2><s3>GBR</s3><sZ>2 aut.</sZ></fA14><fA14 i1="04"><s1>University of Notre Dame, Department of Physics, 225 Nieuwland Science Hall Notre Dame</s1><s3>USA</s3><sZ>3 aut.</sZ></fA14><fA14 i1="05"><s1>University of Tasmania, School of Mathematics and Physics, Private Bag 37, GPO Hobart</s1><s2>Tas 7001</s2><s3>AUS</s3><sZ>5 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ></fA14><fA14 i1="06"><s1>Dipartimento di Fisica, Universita degli Studi di Roma</s1><s3>ITA</s3><sZ>6 aut.</sZ></fA14><fA14 i1="07"><s1>Tor Vergata"</s1><s2>Rome</s2><s3>ITA</s3><sZ>6 aut.</sZ></fA14><fA14 i1="08"><s1>Department of Astronomy, 610 Space Sciences Building, Cornell University</s1><s2>Ithaca, NY 14853</s2><s3>USA</s3><sZ>8 aut.</sZ></fA14><fA14 i1="09"><s1>Sagan Fellow Institute for Advanced Study, Einstein Drive</s1><s2>Princeton, NJ 08540</s2><s3>USA</s3><sZ>8 aut.</sZ></fA14><fA14 i1="10"><s1>Department of Astronomy, Ohio State University, 140 W. 18th Ave.</s1><s2>Columbus, OH 43210</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>11 aut.</sZ></fA14><fA14 i1="11"><s1>Department of Earth and Space Science, Osaka University</s1><s2>Osaka 560-0043</s2><s3>JPN</s3><sZ>10 aut.</sZ></fA14><fA14 i1="12"><s1>Observatoire Midi-Pyrénées, UMR 5572, 14 avenue Edouard Belin</s1><s2>31400 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ></fA14><fA14 i1="13"><s1>Institute of Information and Mathematical Sciences, Massey University, Private Bag 102-904, North Shore Mail Centre</s1><s2>Auckland</s2><s3>NZL</s3><sZ>17 aut.</sZ></fA14><fA14 i1="14"><s1>Department of Physics and Astrophysics, Faculty of Science, Nagoya University</s1><s2>Nagoya 464-8602</s2><s3>JPN</s3><sZ>18 aut.</sZ></fA14><fA14 i1="15"><s1>Warsaw University Observatory. Al. Ujazdowskie 4</s1><s2>00-478 Warszawa</s2><s3>POL</s3><sZ>19 aut.</sZ></fA14><fA14 i1="16"><s1>Laboratoire d'Astrophysique de Grenoble, UMR 5571 Université Joseph Fourier/CNRS, BP 53</s1><s2>38051 Grenoble</s2><s3>FRA</s3><sZ>22 aut.</sZ></fA14><fA20><s2>A78.1-A78.10</s2></fA20><fA21><s1>2012</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>14176</s2><s5>354000506679980140</s5></fA43><fA44><s0>0000</s0><s1>© 2012 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>1/4 p.</s0></fA45><fA47 i1="01" i2="1"><s0>12-0314126</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Astronomy and astrophysics : (Berlin. Print)</s0></fA64><fA66 i1="01"><s0>FRA</s0></fA66><fC01 i1="01" l="ENG"><s0>Context. Microlensing is a unique method to probe low mass exoplanets beyond the snow line. However, the scientific potential of the new microlensing planet discovery is often unfulfilled due to lack of knowledge of the properties of the lens and source stars. The discovery light curve of the super Earth MOA-2007-BLG-192Lb suffers from significant degeneracies that limit what can be inferred about its physical properties. Aims. High resolution adaptive optics images allow us to solve this problem by resolving the microlensing target from all unrelated background stars, yielding the unique determination of magnified source and lens fluxes. This estimation permits the solution of our microlens model for the mass of the planet and its host and their physical projected separation. Methods. We observed the microlensing event MOA-2007-BLG-192 at high angular resolution in JHKs with the NACO adaptive optics system on the VLT while the object was still amplified by a factor 1.23 and then at baseline 18 months later. We analyzed and calibrated the NACO photometry in the standard 2MASS system in order to accurately constrain the source and the lens star fluxes. Results. We detect light from the host star of MOA-2007-BLG-192Lb, which significantly reduces the uncertainties in its characteristics as compared to earlier analyses. We find that MOA-2007-BLG-192L is most likely a very low mass late type M-dwarf (0.084<sup>+0.015</sup><sub>-0.012</sub> M<sub>◦.</sub>) at a distance of 660<sup>+100</sup><sub>-70</sub> pc orbited by a 3.2<sup>+5.2</sup><sub>-1.8</sub> M<sub>◦+</sub> super-Earth at 0.66<sup>+0.51</sup><sub>-0.22</sub> AU. We then discuss the properties of this cold planetary system.</s0></fC01><fC02 i1="01" i2="3"><s0>001E03</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>Microlentille</s0><s5>26</s5></fC03><fC03 i1="01" i2="3" l="ENG"><s0>Microlenses</s0><s5>26</s5></fC03><fC03 i1="02" i2="3" l="FRE"><s0>Planète extrasolaire</s0><s5>27</s5></fC03><fC03 i1="02" i2="3" l="ENG"><s0>Extrasolar planets</s0><s5>27</s5></fC03><fC03 i1="03" i2="3" l="FRE"><s0>Courbe lumière</s0><s5>28</s5></fC03><fC03 i1="03" i2="3" l="ENG"><s0>Light curves</s0><s5>28</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Dégénérescence</s0><s5>29</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Degeneration</s0><s5>29</s5></fC03><fC03 i1="05" i2="3" l="FRE"><s0>Propriété physique</s0><s5>30</s5></fC03><fC03 i1="05" i2="3" l="ENG"><s0>Physical properties</s0><s5>30</s5></fC03><fC03 i1="06" i2="3" l="FRE"><s0>Optique adaptative</s0><s5>31</s5></fC03><fC03 i1="06" i2="3" l="ENG"><s0>Adaptive optics</s0><s5>31</s5></fC03><fC03 i1="07" i2="X" l="FRE"><s0>Modèle</s0><s5>32</s5></fC03><fC03 i1="07" i2="X" l="ENG"><s0>Models</s0><s5>32</s5></fC03><fC03 i1="07" i2="X" l="SPA"><s0>Modelo</s0><s5>32</s5></fC03><fC03 i1="08" i2="3" l="FRE"><s0>Système adaptatif</s0><s5>33</s5></fC03><fC03 i1="08" i2="3" l="ENG"><s0>Adaptive systems</s0><s5>33</s5></fC03><fC03 i1="09" i2="3" l="FRE"><s0>Photométrie</s0><s5>34</s5></fC03><fC03 i1="09" i2="3" l="ENG"><s0>Photometry</s0><s5>34</s5></fC03><fC03 i1="10" i2="X" l="FRE"><s0>Incertitude</s0><s5>35</s5></fC03><fC03 i1="10" i2="X" l="ENG"><s0>Uncertainty</s0><s5>35</s5></fC03><fC03 i1="10" i2="X" l="SPA"><s0>Incertidumbre</s0><s5>35</s5></fC03><fC03 i1="11" i2="3" l="FRE"><s0>Orbite</s0><s5>36</s5></fC03><fC03 i1="11" i2="3" l="ENG"><s0>Orbits</s0><s5>36</s5></fC03><fC03 i1="12" i2="X" l="FRE"><s0>Système planétaire</s0><s5>37</s5></fC03><fC03 i1="12" i2="X" l="ENG"><s0>Planetary system</s0><s5>37</s5></fC03><fC03 i1="12" i2="X" l="SPA"><s0>Sistema planetario</s0><s5>37</s5></fC03><fC03 i1="13" i2="3" l="FRE"><s0>Etoile faible masse</s0><s5>38</s5></fC03><fC03 i1="13" i2="3" l="ENG"><s0>Low-mass stars</s0><s5>38</s5></fC03><fC03 i1="14" i2="X" l="FRE"><s0>Mirage gravitationnel</s0><s5>39</s5></fC03><fC03 i1="14" i2="X" l="ENG"><s0>Gravitational lensing</s0><s5>39</s5></fC03><fC03 i1="14" i2="X" l="SPA"><s0>Espejismo gravitacional</s0><s5>39</s5></fC03><fN21><s1>240</s1></fN21><fN44 i1="01"><s1>OTO</s1></fN44><fN82><s1>OTO</s1></fN82></pA></standard></inist></record>Pour manipuler ce document sous Unix (Dilib)
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