A frozen super-Earth orbiting a star at the bottom of the main sequence
Identifieur interne : 005F17 ( Main/Curation ); précédent : 005F16; suivant : 005F18A 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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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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>Santiago</wicri:noRegion></affiliation></author><author><name sortKey="Beaulieu, J P" sort="Beaulieu, J P" uniqKey="Beaulieu J" first="J. P." last="Beaulieu">J. P. 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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><wicri:noRegion>University of Notre Dame, Department of Physics, 225 Nieuwland Science Hall Notre Dame</wicri:noRegion></affiliation></author><author><name sortKey="Cassan, A" sort="Cassan, A" uniqKey="Cassan A" first="A." last="Cassan">A. 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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><wicri:noRegion>Tas 7001</wicri:noRegion></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><wicri:noRegion>Dipartimento di Fisica, Universita degli Studi di Roma</wicri:noRegion></affiliation><affiliation wicri:level="3"><inist:fA14 i1="07"><s1>Tor Vergata"</s1><s2>Rome</s2><s3>ITA</s3><sZ>6 aut.</sZ></inist:fA14><country>Italie</country><placeName><settlement type="city">Rome</settlement><region nuts="2">Latium</region></placeName></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="3"><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><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Dong, S" sort="Dong, S" uniqKey="Dong S" first="S." last="Dong">S. Dong</name><affiliation wicri:level="4"><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><placeName><settlement type="city">Ithaca (New York)</settlement><region type="state">État de New York</region></placeName><orgName type="university">Université Cornell</orgName></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><wicri:noRegion>Princeton, NJ 08540</wicri:noRegion></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><wicri:noRegion>Columbus, OH 43210</wicri:noRegion></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><wicri:noRegion>Osaka 560-0043</wicri:noRegion></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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>Columbus, OH 43210</wicri:noRegion></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><wicri:noRegion>31400 Toulouse</wicri:noRegion><placeName><settlement type="city">Toulouse</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region></placeName></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>Tas 7001</wicri:noRegion></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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>Tas 7001</wicri:noRegion></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><wicri:noRegion>Auckland</wicri:noRegion></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><wicri:noRegion>Nagoya 464-8602</wicri:noRegion></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><wicri:noRegion>Warsaw University Observatory. Al. Ujazdowskie 4</wicri:noRegion></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>38051 Grenoble</wicri:noRegion><placeName><settlement type="city">Grenoble</settlement><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region></placeName></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><idno type="wicri:Area/PascalFrancis/Checkpoint">001414</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001414</idno><idno type="wicri:doubleKey">0004-6361:2012:Kubas D:a:frozen:super</idno><idno type="wicri:Area/Main/Merge">006249</idno><idno type="wicri:Area/Main/Curation">005F17</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="3"><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><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>London, WC1E 6BT</wicri:noRegion></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><wicri:noRegion>University of Notre Dame, Department of Physics, 225 Nieuwland Science Hall Notre Dame</wicri:noRegion></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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>Tas 7001</wicri:noRegion></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><wicri:noRegion>Dipartimento di Fisica, Universita degli Studi di Roma</wicri:noRegion></affiliation><affiliation wicri:level="3"><inist:fA14 i1="07"><s1>Tor Vergata"</s1><s2>Rome</s2><s3>ITA</s3><sZ>6 aut.</sZ></inist:fA14><country>Italie</country><placeName><settlement type="city">Rome</settlement><region nuts="2">Latium</region></placeName></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="3"><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><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Dong, S" sort="Dong, S" uniqKey="Dong S" first="S." last="Dong">S. Dong</name><affiliation wicri:level="4"><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><placeName><settlement type="city">Ithaca (New York)</settlement><region type="state">État de New York</region></placeName><orgName type="university">Université Cornell</orgName></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><wicri:noRegion>Princeton, NJ 08540</wicri:noRegion></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><wicri:noRegion>Columbus, OH 43210</wicri:noRegion></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><wicri:noRegion>Osaka 560-0043</wicri:noRegion></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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>Columbus, OH 43210</wicri:noRegion></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><wicri:noRegion>31400 Toulouse</wicri:noRegion><placeName><settlement type="city">Toulouse</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region></placeName></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>Tas 7001</wicri:noRegion></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><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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><wicri:noRegion>Tas 7001</wicri:noRegion></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><wicri:noRegion>Auckland</wicri:noRegion></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><wicri:noRegion>Nagoya 464-8602</wicri:noRegion></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><wicri:noRegion>Warsaw University Observatory. Al. Ujazdowskie 4</wicri:noRegion></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>Santiago</wicri:noRegion></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><wicri:noRegion>38051 Grenoble</wicri:noRegion><placeName><settlement type="city">Grenoble</settlement><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Rhône-Alpes</region></placeName></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></record>Pour manipuler ce document sous Unix (Dilib)
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