[en] Microlensing detections of cool planets are important for the construction of an unbiased sample to estimate the frequency of planets beyond the snow line, which is where giant planets are thought to form according to the core accretion theory of planet formation. In this paper, we report the discovery of a giant planet detected from the analysis of the light curve of a high-magnification microlensing event MOA 2010-BLG-477. The measured planet-star mass ratio is q = (2.181 ± 0.004) × 10[SUP]-3[/SUP] and the projected separation is s = 1.1228 ± 0.0006 in units of the Einstein radius. The angular Einstein radius is unusually large θ[SUB]E[/SUB] = 1.38 ± 0.11 mas. Combining this measurement with constraints on the "microlens parallax" and the lens flux, we can only limit the host mass to the range 0.13 < M/M [SUB]&sun;[/SUB] < 1.0. In this particular case, the strong degeneracy between microlensing parallax and planet orbital motion prevents us from measuring more accurate host and planet masses. However, we find that adding Bayesian priors from two effects (Galactic model and Keplerian orbit) each independently favors the upper end of this mass range, yielding star and planet masses of M [SUB]*[/SUB] = 0.67[SUP]+0.33[/SUP] [SUB]- 0.13[/SUB] M [SUB]&sun;[/SUB] and m[SUB]p[/SUB] = 1.5[SUP]+0.8[/SUP] [SUB]- 0.3[/SUB] M [SUB]JUP[/SUB] at a distance of D = 2.3 ± 0.6 kpc, and with a semi-major axis of a = 2[SUP]+3[/SUP] [SUB]- 1[/SUB] AU. Finally, we show that the lens mass can be determined from future high-resolution near-IR adaptive optics observations independently from two effects, photometric and astrometric.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Bachelet, E.; IRAP, Université de Toulouse, CNRS, 14 Avenue Edouard Belin, 31400 Toulouse, France
Shin, I.-G.; Department of Physics, Chungbuk National University, Cheongju 361-763, Republic of Korea
Han, C.; Department of Physics, Chungbuk National University, Cheongju 361-763, Republic of Korea ; Corresponding author.
Fouqué, P.; IRAP, Université de Toulouse, CNRS, 14 Avenue Edouard Belin, 31400 Toulouse, France
Gould, A.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Menzies, J. W.; South African Astronomical Observatory, P.O. Box 9, Observatory 7925, South Africa
Beaulieu, J.-P.; UPMC-CNRS, UMR 7095, Institut d'Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris, France
Bennett, D. P.; Department of Physics, 225 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556, USA
Bond, I. A.; Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
Dong, Subo; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA ; Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540, USA
Heyrovský, D.; Institute of Theoretical Physics, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic
Rattenbury, N. J.; Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand
Saito, To; Tokyo Metropolitan College of Aeronautics, Tokyo 116-8523, Japan
Sullivan, D. J.; School of Chemical and Physical Sciences, Victoria University, Wellington, New Zealand
Suzuki, D.; Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
Sweatman, W. L.; Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
Tristram, P. J.; Mt. John University Observatory, P.O. Box 56, Lake Tekapo 8770, New Zealand
Wada, K.; Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
Yock, P. C. M.; Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand
The MOA Collaboration
Szymański, M. K.; Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Marquette, J.-B.; UPMC-CNRS, UMR 7095, Institut d'Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris, France
Pietrzyński, G.; Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ; Departamento de Astronomía, Universidad de Concepción, Casilla 160-C, Concepción, Chile
Wyrzykowski, Ł.; Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
The OGLE Collaboration
Kains, N.; European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany ; SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
Snodgrass, C.; Max Planck Institute for Solar System Research, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany
Steele, I. A.; Astrophysics Research Institute, Liverpool John Moores University, Liverpool CH41 1LD, UK
Marshall, J.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
The RoboNet Collaboration
Alsubai, K. A.; Qatar Foundation, P.O. Box 5825, Doha, Qatar
Bozza, V.; Dipartimento di Fisica "E. R. Caianiello," Università degli Studi di Salerno, Via S. Allende, 84081 Baronissi (SA), Italy
Browne, P.; SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
Burgdorf, M. J.; Deutsches SOFIA Institut, Universität Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany ; SOFIA Science Center, NASA Ames Research Center, Mail Stop N211-3, Moffett Field, CA 94035, USA
Calchi Novati, S.; Dipartimento di Fisica "E. R. Caianiello," Università degli Studi di Salerno, Via S. Allende, 84081 Baronissi (SA), Italy ; Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Vietri Sul Mare (SA), Italy
Dodds, P.; SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
Finet, François ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Gerner, T.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Skowron, J.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Hardis, S.; Niels Bohr Institutet, Københavns Universitet, Juliane Maries Vej 30, 2100 København Ø, Denmark
Harpsøe, K.; Niels Bohr Institutet, Københavns Universitet, Juliane Maries Vej 30, 2100 København Ø, Denmark ; Centre for Star and Planet Formation, Københavns Universitet, Øster Voldgade 5-7, 1350 København Ø, Denmark
Hinse, T. C.; Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon 305-348, Republic of Korea
Kerins, E.; Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Mancini, L.; Dipartimento di Fisica "E. R. Caianiello," Università degli Studi di Salerno, Via S. Allende, 84081 Baronissi (SA), Italy ; Max Planck Institute for Astronomy, Königstuhl 17, 619117 Heidelberg, Germany
Mathiasen, M.; Niels Bohr Institutet, Københavns Universitet, Juliane Maries Vej 30, 2100 København Ø, Denmark
Penny, M. T.; Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Proft, S.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Rahvar, S.; Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran, Iran
Ricci, Davide ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Street, R. A.; Las Cumbres Observatory Global Telescope Network, 6740B Cortona Dr, Goleta, CA 93117, USA
Scarpetta, G.; Dipartimento di Fisica "E. R. Caianiello," Università degli Studi di Salerno, Via S. Allende, 84081 Baronissi (SA), Italy ; INFN, Gruppo Collegato di Salerno, Sezione di Napoli, Italy
Schönebeck, F.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Southworth, J.; Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK
Surdej, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Wambsganss, J.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
MiNDSTEp Consortium, The; )
Sumi, T.; Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan ; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Abe, L.; Laboratoire Fizeau, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, 06300 Nice, France
Agabi, K.; Laboratoire Fizeau, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, 06300 Nice, France
Albrow, M. D.; Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand
Allen, W.; Vintage Lane Observatory, Blenheim, New Zealand
Bertin, E.; UPMC-CNRS, UMR 7095, Institut d'Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris, France
Bos, M.; Molehill Astronomical Observatory, North Shore, New Zealand
Bramich, D. M.; European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
Chavez, J.; McDonald Observatory, 16120 St. Hwy Spur 78 #2, Fort Davis, TX 79734, USA
Christie, G. W.; Auckland Observatory, Auckland, New Zealand
Cole, A. A.; School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
Crouzet, N.; Laboratoire Fizeau, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, 06300 Nice, France
Dieters, S.; School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
Dominik, M.; SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK ; Royal Society University Research Fellow.
Drummond, J.; Possum Observatory, New Zealand
Greenhill, J.; School of Mathematics and Physics, University of Tasmania, Private Bag 37, Hobart, TAS 7001, Australia
Guillot, T.; Laboratoire Fizeau, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, 06300 Nice, France
Henderson, C. B.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Hessman, F. V.; Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
Horne, K.; SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
Hundertmark, M.; SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK ; Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
Johnson, J. A.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Jørgensen, U. G.; Niels Bohr Institutet, Københavns Universitet, Juliane Maries Vej 30, 2100 København Ø, Denmark ; Centre for Star and Planet Formation, Københavns Universitet, Øster Voldgade 5-7, 1350 København Ø, Denmark
Kandori, R.; National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Liebig, C.; SUPA, School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK ; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Mékarnia, D.; Laboratoire Fizeau, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, 06300 Nice, France
McCormick, J.; Farm Cove Observatory, Centre for Backyard Astrophysics, Pakuranga, Auckland, New Zealand
Moorhouse, D.; Kumeu Observatory, Kumeu, New Zealand
Nagayama, T.; Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
Nataf, D.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Natusch, T.; Auckland Observatory, Auckland, New Zealand ; Institute for Radiophysics and Space Research, AUT University, Auckland, New Zealand
Nishiyama, S.; Extrasolar Planet Detection Project Office, National Astronomical Observatory of Japan (NAOJ), Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan
Rivet, J.-P.; Laboratoire Fizeau, Observatoire de la Côte d'Azur, Boulevard de l'Observatoire, 06300 Nice, France
Sahu, K. C.; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
Shvartzvald, Y.; School of Physics and Astronomy and Wise Observatory, Tel-Aviv University, Tel-Aviv 69978, Israel
Thornley, G.; Kumeu Observatory, Kumeu, New Zealand
Tomczak, A. R.; Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843-4242, USA
Tsapras, Y.; Las Cumbres Observatory Global Telescope Network, 6740B Cortona Dr, Goleta, CA 93117, USA ; School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London E1 4NS, UK
Yee, J. C.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Batista, V.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA ; UPMC-CNRS, UMR 7095, Institut d'Astrophysique de Paris, 98bis boulevard Arago, F-75014 Paris, France
Bennett, C. S.; Department of Physics, Massachussets Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
Zub, M.; Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
The PLANET Collaboration
de Almeida, L. Andrade; Divisao de Astrofisica, Instituto Nacional de Pesquisas Espaciais, Avenida dos Astronautas, 1758 Sao José dos Campos, 12227-010 SP, Brazil
DePoy, D. L.; Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843-4242, USA
Gaudi, B. S.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Hung, L.-W.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Jablonski, F.; Divisao de Astrofisica, Instituto Nacional de Pesquisas Espaciais, Avenida dos Astronautas, 1758 Sao José dos Campos, 12227-010 SP, Brazil
Kaspi, S.; School of Physics and Astronomy and Wise Observatory, Tel-Aviv University, Tel-Aviv 69978, Israel
Klein, N.; School of Physics and Astronomy and Wise Observatory, Tel-Aviv University, Tel-Aviv 69978, Israel
Lee, C.-U.; Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon 305-348, Republic of Korea
Lee, Y.; Department of Astronomy and Space Science, Chungnam University, Republic of Korea
Koo, J.-R.; Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon 305-348, Republic of Korea
Maoz, D.; School of Physics and Astronomy and Wise Observatory, Tel-Aviv University, Tel-Aviv 69978, Israel
Muñoz, J. A.; Departamento de Astronomiá y Astrofísica, Universidad de Valencia, E-46100 Burjassot, Valencia, Spain
Pogge, R. W.; Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
Polishook, D.; School of Physics and Astronomy and Wise Observatory, Tel-Aviv University, Tel-Aviv 69978, Israel
Shporer, A.; Las Cumbres Observatory Global Telescope Network, 6740B Cortona Dr, Goleta, CA 93117, USA ; Department of Physics, University of California, Santa Barbara, CA 93106, USA
Collaboration, The F. U. N.
Abe, F.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Botzler, C. S.; Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand
Chote, P.; School of Chemical and Physical Sciences, Victoria University, Wellington, New Zealand
Freeman, M.; Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand
Fukui, A.; Okayama Astrophysical Observatory, National Astronomical Observatory, 3037-5 Honjo, Kamogata, Asakuchi, Okayama 719-0232, Japan
Furusawa, K.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Harris, P.; School of Chemical and Physical Sciences, Victoria University, Wellington, New Zealand
Itow, Y.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Kobara, S.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Ling, C. H.; Institute for Information and Mathematical Sciences, Massey University, Private Bag 102-904, Auckland 1330, New Zealand
Masuda, K.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Matsubara, Y.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Miyake, N.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Ohmori, K.; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Ohnishi, K.; Nagano National College of Technology, Nagano 381-8550, Japan
