Article (Scientific journals)
Microlensing Binaries Discovered through High-magnification Channel
Shin, I.-G.; Choi, J.-Y.; Park, S.-Y. et al.
2012In Astrophysical Journal, 746, p. 127
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Keywords :
binaries: general; gravitational lensing: micro
Abstract :
[en] Microlensing can provide a useful tool to probe binary distributions down to low-mass limits of binary companions. In this paper, we analyze the light curves of eight binary-lensing events detected through the channel of high-magnification events during the seasons from 2007 to 2010. The perturbations, which are confined near the peak of the light curves, can be easily distinguished from the central perturbations caused by planets. However, the degeneracy between close and wide binary solutions cannot be resolved with a 3σ confidence level for three events, implying that the degeneracy would be an important obstacle in studying binary distributions. The dependence of the degeneracy on the lensing parameters is consistent with a theoretical prediction that the degeneracy becomes severe as the binary separation and the mass ratio deviate from the values of resonant caustics. The measured mass ratio of the event OGLE-2008-BLG-510/MOA-2008-BLG-369 is q ~ 0.1, making the companion of the lens a strong brown dwarf candidate.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Shin, I.-G.;  Department of Physics, Institute for Astrophysics, Chungbuk National University, Cheongju 371-763, Republic of Korea
Choi, J.-Y.;  Department of Physics, Institute for Astrophysics, Chungbuk National University, Cheongju 371-763, Republic of Korea
Park, S.-Y.;  Department of Physics, Institute for Astrophysics, Chungbuk National University, Cheongju 371-763, Republic of Korea
Han, C.;  Department of Physics, Institute for Astrophysics, Chungbuk National University, Cheongju 371-763, Republic of Korea ; The μFUN Collaboration. ; Author.
Gould, A.;  Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA ; The μFUN Collaboration.
Sumi, T.;  Department of Earth and Space Science, Osaka University, Osaka 560-0043, Japan ; The MOA Collaboration.
Udalski, A.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ; The OGLE Collaboration.
Beaulieu, J.-P.;  Institut d'Astrophysique de Paris, UMR7095 CNRS-Université Pierre & Marie Curie, 98 bis Boulevard Arago, 75014 Paris, France ; The PLANET Collaboration.
Dominik, M.;  School of Physics & Astronomy, SUPA, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK ; The RoboNet Collaboration. ; The MiNDSTEp Consortium. ; Royal Society University Research Fellow.
Allen, W.;  Vintage Lane Observatory, Blenheim, New Zealand
Bos, M.;  Molehill Astronomical Observatory, North Shore, New Zealand
Greenhill, J.;  School of Math and Physics, University of Tasmania, Private Bag 37, GPO Hobart, Tasmania 7001, Australia
Hoffman, M.;  Faculty of Natural and Agricultural Sciences, Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
Jørgensen, U. G.;  Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, Denmark ; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, 1350 Copenhagen, Denmark
Kane, S. R.;  NASA Exoplanet Science Institute, Caltech, MS 100-22, 770 South Wilson Avenue, Pasadena, CA 91125, USA
Kubas, D.;  Institut d'Astrophysique de Paris, UMR7095 CNRS-Université Pierre & Marie Curie, 98 bis Boulevard Arago, 75014 Paris, France ; European Southern Observatory, Casilla 19001, Vitacura 19, Santiago, Chile
Marquette, J.-B.;  Institut d'Astrophysique de Paris, UMR7095 CNRS-Université Pierre & Marie Curie, 98 bis Boulevard Arago, 75014 Paris, France
Martin, R.;  Perth Observatory, Walnut Road, Bickley, Perth 6076, Australia
Meintjes, P.;  Faculty of Natural and Agricultural Sciences, Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
Menzies, J.;  South African Astronomical Observatory, P.O. Box 9 Observatory 7935, South Africa
Pollard, K. R.;  Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand
Christie, G. W.;  Auckland Observatory, P.O. Box 24-180, Auckland, New Zealand
Sahu, K. C.;  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
Wambsganss, J.;  Astronomisches Rechen-Institut (ARI), Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstrasse 12-14, 69120 Heidelberg, Germany
Williams, A.;  Perth Observatory, Walnut Road, Bickley, Perth 6076, Australia
Vinter, C.;  Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, Denmark
Zub, M.;  Astronomisches Rechen-Institut (ARI), Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstrasse 12-14, 69120 Heidelberg, Germany
Allan, A.;  School of Physics, University of Exeter, Stocker Road, Exeter, Devon, EX4 4QL, UK
Browne, P.;  School of Physics & Astronomy, SUPA, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK
Horne, K.;  School of Physics & Astronomy, SUPA, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK
Snodgrass, C.;  European Southern Observatory, Casilla 19001, Vitacura 19, Santiago, Chile ; Max-Planck-Institut för Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany
Depoy, D. L.;  Department of Physics, Texas A&M University, College Station, TX, USA
Steele, I.;  Astrophysics Research Institute, Liverpool John Moores University, Egerton Wharf, Birkenhead CH41 1LD, UK
Street, R.;  Las Cumbres Observatory Global Telescope Network, 6740B Cortona Dr, Suite 102, Goleta, CA 93117, USA
Tsapras, Y.;  Las Cumbres Observatory Global Telescope Network, 6740B Cortona Dr, Suite 102, Goleta, CA 93117, USA
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, Paul;  School of Physics & Astronomy, SUPA, 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.;  School of Physics & Astronomy, SUPA, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK
Dong, S.;  Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540, USA
Dreizler, S.;  Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
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
Glitrup, M.;  Department of Physics & Astronomy, Aarhus Universitet, Ny Munkegade, 8000 Århus C, Denmark
Grundahl, F.;  Department of Physics & Astronomy, Aarhus Universitet, Ny Munkegade, 8000 Århus C, Denmark
Hardis, S.;  Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, Denmark
Harpsøe, K.;  Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, Denmark ; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, 1350 Copenhagen, Denmark
Hessman, F. V.;  Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
Hinse, T. C.;  Korea Astronomy and Space Science Institute, Daejeon 305-348, Republic of Korea ; Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, Denmark ; Armagh Observatory, College Hill, Armagh, BT61 9DG, Northern Ireland, UK
Hundertmark, M.;  School of Physics & Astronomy, SUPA, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK ; Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
Drummond, J.;  Possum Observatory, Patutahi, New Zealand
Kains, N.;  School of Physics & Astronomy, SUPA, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK ; ESO Headquarters, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
Kerins, E.;  Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
Liebig, C.;  School of Physics & Astronomy, SUPA, 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
Maier, G.;  Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
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 Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, 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)
Gal-Yam, A.;  Benoziyo Center for Astrophysics, the Weizmann Institute, Israel
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
Schäfer, S.;  Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
Schönebeck, F.;  Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Skottfelt, J.;  Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, Denmark
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Southworth, J.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Zimmer, F.;  Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, 69120 Heidelberg, Germany
Gaudi, B. S.;  Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA
Hung, L.-W.;  Department of Physics & Astronomy, University of California Los Angeles, Los Angeles, CA 90095, USA
Janczak, J.;  Department of Physics, Ohio State University, 191 W. Woodruff, Columbus, OH 43210, USA
Kaspi, S.;  School of Physics and Astronomy, Tel-Aviv University, Tel Aviv 69978, Israel
Lee, C.-U.;  Korea Astronomy and Space Science Institute, Daejeon 305-348, Republic of Korea
Mallia, F.;  Campo Catino Austral Observatory, San Pedro de Atacama, Chile
Maoz, D.;  School of Physics and Astronomy, Tel-Aviv University, Tel Aviv 69978, Israel
Maury, A.;  Campo Catino Austral Observatory, San Pedro de Atacama, Chile
McCormick, J.;  Farm Cove Observatory, Pakuranga, Auckland, New Zealand
Monard, L. A. G.;  Bronberg Observatory, Pretoria, South Africa
Moorhouse, D.;  Kumeu Observatory, Kumeu, New Zealand
Muñoz, J. A.;  Departamento de Astronomiá y Astrofísica, Universidad de Valencia, E-46100 Burjassot, Valencia, Spain
Natusch, T.;  Auckland Observatory, P.O. Box 24-180, Auckland, New Zealand
Nelson, C.;  College of Optical Sciences, University of Arizona, 1630 E. University Blvd, Tucson, AZ 85721, USA
Park, B.-G.;  Korea Astronomy and Space Science Institute, Daejeon 305-348, Republic of Korea
Pogge, R. W.;  Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA
Polishook, D.;  School of Physics and Astronomy, Tel-Aviv University, Tel Aviv 69978, Israel
Shvartzvald, Y.;  School of Physics and Astronomy, Tel-Aviv University, Tel Aviv 69978, Israel
Shporer, A.;  School of Physics and Astronomy, Tel-Aviv University, Tel Aviv 69978, Israel
Thornley, G.;  Kumeu Observatory, Kumeu, New Zealand
Yee, J. C.;  Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA
Abe, F.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Bennett, D. P.;  Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA
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Botzler, C. S.;  Department of Physics, University of Auckland, Private Bag 92019, Auckland, New Zealand
Fukui, A.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Furusawa, K.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Hayashi, F.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
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Hosaka, S.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Itow, Y.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Kamiya, K.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Kilmartin, P. M.;  Mt. John Observatory, P.O. Box 56, Lake Tekapo 8770, New Zealand
Kobara, S.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Korpela, A.;  School of Chemical and Physical Sciences, Victoria University, Wellington, New Zealand
Lin, W.;  Institute of Information and Mathematical Sciences, Massey University, Private Bag 102-904, North Shore Mail Centre, Auckland, New Zealand
Ling, C. H.;  Institute of Information and Mathematical Sciences, Massey University, Private Bag 102-904, North Shore Mail Centre, Auckland, New Zealand
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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
Muraki, Y.;  Department of Physics, Konan University, Nishiokamoto 8-9-1, Kobe 658-8501, Japan
Nagaya, M.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Nishimoto, K.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Ohnishi, K.;  Nagano National College of Technology, Nagano 381-8550, Japan
Okumura, T.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
Omori, K.;  Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
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Sullivan, D. J.;  School of Chemical and Physical Sciences, Victoria University, Wellington, New Zealand
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Tristram, P. J.;  Mt. John Observatory, P.O. Box 56, Lake Tekapo 8770, New Zealand
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Szymański, M. K.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Kubiak, M.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Pietrzyński, G.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ; Departamento de Fisica, Universidad de Concepción, Casilla 160-C, Concepción, Chile
Soszyński, I.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Poleski, R.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Ulaczyk, K.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Wyrzykowski, Ł.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland ; Institute of Astronomy Cambridge University, Madingley Road, CB3 0HA Cambridge, UK
Kozłowski, S.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Pietrukowicz, P.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland
Albrow, M. D.;  Department of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch 8020, New Zealand
Batista, V.;  Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA
Bramich, D. M.;  European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748 Garching bei München, Germany
Brillant, S.;  European Southern Observatory, Casilla 19001, Vitacura 19, Santiago, Chile
Caldwell, J. A. R.;  McDonald Observatory, 16120 St Hwy Spur 78 #2, Fort Davis, TX 79734, USA
Calitz, J. J.;  Faculty of Natural and Agricultural Sciences, Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
Cassan, A.;  Institut d'Astrophysique de Paris, UMR7095 CNRS-Université Pierre & Marie Curie, 98 bis Boulevard Arago, 75014 Paris, France
Cole, A.;  School of Math and Physics, University of Tasmania, Private Bag 37, GPO Hobart, Tasmania 7001, Australia
Cook, K. H.;  Institute of Geophysics and Planetary Physics (IGPP), L-413, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA 94551, USA
Corrales, E.;  Institut d'Astrophysique de Paris, UMR7095 CNRS-Université Pierre & Marie Curie, 98 bis Boulevard Arago, 75014 Paris, France
Coutures, Ch;  Institut d'Astrophysique de Paris, UMR7095 CNRS-Université Pierre & Marie Curie, 98 bis Boulevard Arago, 75014 Paris, France
Dieters, S.;  Institut d'Astrophysique de Paris, UMR7095 CNRS-Université Pierre & Marie Curie, 98 bis Boulevard Arago, 75014 Paris, France ; LATT, Université de Toulouse, CNRS, 14 Avenue Edouard Belin, 31400 Toulouse, France
Dominis Prester, D.;  Physics Department, Faculty of Arts and Sciences, University of Rijeka, Omladinska 14, 51000 Rijeka, Croatia
Donatowicz, J.;  Department of Computing, Technical University of Vienna, Wiedner Hauptstrasse 10, Vienna, Austria
Fouqué, P.;  LATT, Université de Toulouse, CNRS, 14 Avenue Edouard Belin, 31400 Toulouse, France
More authors (142 more) Less
Language :
English
Title :
Microlensing Binaries Discovered through High-magnification Channel
Publication date :
01 February 2012
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
University of Chicago Press, Chicago, United States - Illinois
Volume :
746
Pages :
127
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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