Microlensing Binaries with Candidate Brown Dwarf Companions

Publication: Research - peer-reviewJournal article – Annual report year: 2012

  • Author: Shin, I.-G

    Chungbuk National University

  • Author: Han, C.

    Chungbuk National University

  • Author: Gould, A.

    Ohio State University

  • Author: Udalski, A.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Sumi, T.

    Osaka University

  • Author: Dominik, M.

    University of St Andrews

  • Author: Beaulieu, J.-P

    Inst. d'Astrophys. de Paris, Univ. Pierre & Marie Curie, Paris, Universite´ Pierre & Marie Curie, Institut d'Astrophysique de Paris UMR7095 CNRS 98 bis boulevard Arago, Paris F-75014 France

  • Author: Tsapras, Y.

    Las Cumbres Obs. Global Telescope Network, Goleta, CA, Las Cumbres Observatory Global Telescope Network 6740B Cortona Dr. Suite 102, Goleta CA 93117 USA

  • Author: Bozza, V.

    Università degli Studi di Salerno

  • Author: Szyman´ski, M. K.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Kubiak, M.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Soszyn´ski, I.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Pietrzyn´ski, G.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Poleski, R.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Ulaczyk, K.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Pietrukowicz, P.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Kozłowski, S.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Skowron, J.

    Ohio State University

  • Author: Wyrzykowski, Ł.

    Warsaw Univ. Obs., Warsaw, Warsaw University Observatory Al. Ujazdowskie 4, Warsaw 00-478 Poland

  • Author: Abe, F.

    Nagoya University

  • Author: Bennett, D. P.

    Dept. of Phys., Univ. of Notre Dame, Notre Dame, IN, University of Notre Dame, Department of Physics, Notre Dame IN 46556 USA

  • Author: Bond, I. A.

    Massey University

  • Author: Botzler, C. S.

    University of Auckland

  • Author: Freeman, M.

    University of Auckland

  • Author: Fukui, A.

    Nagoya University

  • Author: Furusawa, K.

    Nagoya University

  • Author: Hayashi, F.

    Nagoya University

  • Author: Hearnshaw, J. B.

    University of Canterbury

  • Author: Hosaka, S.

    Nagoya University

  • Author: Itow, Y.

    Nagoya University

  • Author: Kamiya, K.

    Nagoya University

  • Author: Kilmartin, P. M.

    Mt. John Obs., Lake Tekapo, Mt. John Observatory P.O. Box 56, Lake Tekapo 8770 New Zealand

  • Author: Kobara, S.

    Nagoya University

  • Author: Korpela, A.

    Victoria University of Wellington

  • Author: Lin, W.

    Massey University

  • Author: Ling, C. H.

    Massey University

  • Author: Makita, S.

    Nagoya University

  • Author: Masuda, K.

    Nagoya University

  • Author: Matsubara, Y.

    Nagoya University

  • Author: Miyake, N.

    Nagoya University

  • Author: Muraki, Y.

    Dept. of Phys., Konan Univ., Kobe, Konan University, Department of Physics Nishiokamoto 8-9-1, Kobe 658-8501 Japan

  • Author: Nagaya, M.

    Nagoya University

  • Author: Nishimoto, K.

    Nagoya University

  • Author: Ohnishi, K.

    Nagano Nat. Coll. of Technol., Nagano, Nagano National College of Technology, Nagano 381-8550 Japan

  • Author: Okumura, T.

    Nagoya University

  • Author: Omori, K.

    Nagoya University

  • Author: Perrott, Y. C.

    University of Auckland

  • Author: Rattenbury, N.

    University of Auckland

  • Author: Saito, To

    Tokyo Metropolitan Coll. of Ind. Technol., Tokyo, Tokyo Metropolitan College of Industrial Technology, Tokyo 116-8523 Japan

  • Author: Skuljan, L.

    Massey University

  • Author: Sullivan, D. J.

    Victoria University of Wellington

  • Author: Suzuki, D.

    Osaka University

  • Author: Sweatman, W. L.

    Massey University

  • Author: Tristram, P. J.

    Mt. John Obs., Lake Tekapo, Mt. John Observatory P.O. Box 56, Lake Tekapo 8770 New Zealand

  • Author: Wada, K.

    Osaka University

  • Author: Yock, P. C. M.

    University of Auckland

  • Author: Christie, G. W.

    Auckland Obs., Auckland, Auckland Observatory P.O. Box 24-180, Auckland New Zealand

  • Author: Depoy, D. L.

    Texas A&M University

  • Author: Dong, S.

    Inst. for Adv. Study, Princeton, NJ, Institute for Advanced Study Einstein Dr., Princeton NJ 08540 USA

  • Author: Gal-Yam, A.

    Benoziyo Center for Astrophys., Weizmann Inst., Rehovot, Weizmann Institute, Benoziyo Center for Astrophysics, Rehovot 76100 Israel

  • Author: Gaudi, B. S.

    Ohio State University

  • Author: Hung, L.-W

    University of California, Los Angeles

  • Author: Janczak, J.

    Ohio State University

  • Author: Kaspi, S.

    Sch. of Phys. & Astron., Tel-Aviv Univ., Tel Aviv, Tel-Aviv University, School of Physics and Astronomy, Tel Aviv 69978 Israel

  • Author: Maoz, D.

    Sch. of Phys. & Astron., Tel-Aviv Univ., Tel Aviv, Tel-Aviv University, School of Physics and Astronomy, Tel Aviv 69978 Israel

  • Author: McCormick, J.

    Farm Cove Obs., Auckland, Farm Cove Observatory Pakuranga, Auckland New Zealand

  • Author: McGregor, D.

    Ohio State University

  • Author: Moorhouse, D.

    Kumeu Obs., Kumeu, Kumeu Observatory, Kumeu New Zealand

  • Author: Muñoz, J. A.

    Dept. de Astron. y Astrofis., Univ. de Valencia, Valencia, Universidad de Valencia, Departamento de Astronomia´ y Astrofi´sica Burjassot, Valencia E-46100 Spain

  • Author: Natusch, T.

    Auckland Obs., Auckland, Auckland Observatory P.O. Box 24-180, Auckland New Zealand

  • Author: Nelson, C.

    University of Arizona

  • Author: Pogge, R. W.

    Ohio State University

  • Author: Tan, T.-G

    Perth Exoplanet Survey Telescope, Perth, WA, Perth Exoplanet Survey Telescope, Perth WA Australia

  • Author: Polishook, D.

    Sch. of Phys. & Astron., Tel-Aviv Univ., Tel Aviv, Tel-Aviv University, School of Physics and Astronomy, Tel Aviv 69978 Israel

  • Author: Shvartzvald, Y.

    Sch. of Phys. & Astron., Tel-Aviv Univ., Tel Aviv, Tel-Aviv University, School of Physics and Astronomy, Tel Aviv 69978 Israel

  • Author: Shporer, A.

    Las Cumbres Obs. Global Telescope Network, Goleta, CA, Las Cumbres Observatory Global Telescope Network 6740B Cortona Dr. Suite 102, Goleta CA 93117 USA

  • Author: Thornley, G.

    Kumeu Obs., Kumeu, Kumeu Observatory, Kumeu New Zealand

  • Author: Malamud, U.

    Sch. of Phys. & Astron., Tel-Aviv Univ., Tel Aviv, Tel-Aviv University, School of Physics and Astronomy, Tel Aviv 69978 Israel

  • Author: Yee, J. C.

    Ohio State University

  • Author: Choi, J.-Y

    Chungbuk National University

  • Author: Jung, Y.-K

    Chungbuk National University

  • Author: Park, H.

    Chungbuk National University

  • Author: Lee, C.-U

    Korea Astron. & Space Sci. Inst., Daejeon, Korea Astronomy and Space Science Institute 776 Daedukdae-ro Yuseong-gu, Daejeon 305-348 South Korea

  • Author: Park, B.-G

    Korea Astron. & Space Sci. Inst., Daejeon, Korea Astronomy and Space Science Institute 776 Daedukdae-ro Yuseong-gu, Daejeon 305-348 South Korea

  • Author: Koo, J.-R

    Korea Astron. & Space Sci. Inst., Daejeon, Korea Astronomy and Space Science Institute 776 Daedukdae-ro Yuseong-gu, Daejeon 305-348 South Korea

  • Author: Bajek, D.

    University of St Andrews

  • Author: Bramich, D. M.

    European Southern Observatory

  • Author: Browne, P.

    University of St Andrews

  • Author: Horne, K.

    University of St Andrews

  • Author: Ipatov, S.

    Qatar Found., Doha, Qatar Foundation P.O. Box 5825, Doha Qatar

  • Author: Snodgrass, C.

    Max Planck Institute

  • Author: Steele, I.

    Astrophys. Res. Inst., Liverpool John Moores Univ., Birkenhead, Liverpool John Moores University, Astrophysics Research Institute Egerton Wharf, Birkenhead CH41 1LD UK

  • Author: Street, R.

    Las Cumbres Obs. Global Telescope Network, Goleta, CA, Las Cumbres Observatory Global Telescope Network 6740B Cortona Dr. Suite 102, Goleta CA 93117 USA

  • Author: Alsubai, K. A.

    Qatar Found., Doha, Qatar Foundation P.O. Box 5825, Doha Qatar

  • Author: Burgdorf, M. J.

    HE Space Oper. GmbH, Bremen, HE Space Operations GmbH Flughafenallee 24, Bremen D-28199 Germany

  • Author: Calchi Novati, S.

    Università degli Studi di Salerno

  • Author: Dodds, P.

    University of St Andrews

  • Author: Dreizler, S.

    Inst. fur Astrophys., Georg-August-Univ., Go¨ttingen, Georg-August-Universita¨t, Institut fu¨r Astrophysik Friedrich-Hund-Platz 1, Go¨ttingen D-37077 Germany

  • Author: Fang, X.-S

    Joint Lab. for Opt. Astron., Nat. Astron. Obs./Yunnan Obs., Kunming, National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Kunming 650011 China

  • Author: Grundahl, F.

    Aarhus University

  • Author: Gu, C.-H

    Joint Lab. for Opt. Astron., Nat. Astron. Obs./Yunnan Obs., Kunming, National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, Kunming 650011 China

  • Author: Hardis, S.

    University of Copenhagen

  • Author: Harpsøe, K.

    University of Copenhagen

  • Author: Hinse, T. C.

    Korea Astron. & Space Sci. Inst., Daejeon, Korea Astronomy and Space Science Institute 776 Daedukdae-ro Yuseong-gu, Daejeon 305-348 South Korea

  • Author: Hundertmark, M.

    University of St Andrews

  • Author: Jessen-Hansen, J.

    Aarhus University

  • Author: Jørgensen, U. G.

    University of Copenhagen

  • Author: Kains, N.

    University of St Andrews

  • Author: Kerins, E.

    University of Manchester

  • Author: Liebig, C.

    University of St Andrews

  • Author: Lund, M.

    Aarhus University

  • Author: Lundkvist, M.

    Aarhus University

  • Author: Mancini, L.

    Università degli Studi di Salerno

  • Author: Mathiasen, M.

    University of Copenhagen

  • Author: Hornstrup, Allan

    IT-Department, Astrophysics, National Space Institute, Technical University of Denmark, Elektrovej, 2800, Kgs. Lyngby, Denmark

  • Author: Penny, M. T.

    University of Manchester

  • Author: Proft, S.

    Heidelberg University

  • Author: Rahvar, S.

    Sharif University of Technology

  • Author: Ricci, D.

    Inst. d'Astrophys. et de Geophys., Lie`ge, Institut d'Astrophysique et de Ge´ophysique Alle´e du 6 Aou^t 17 Sart Tilman Ba^t. B5c, Lie`ge B-4000 Belgium

  • Author: Scarpetta, G.

    Università degli Studi di Salerno

  • Author: Skottfelt, J.

    University of Copenhagen

  • Author: Southworth, J.

    Keele University

  • Author: Surdej, J.

    Inst. d'Astrophys. et de Geophys., Lie`ge, Institut d'Astrophysique et de Ge´ophysique Alle´e du 6 Aou^t 17 Sart Tilman Ba^t. B5c, Lie`ge B-4000 Belgium

  • Author: Tregloan-Reed, J.

    Keele University

  • Author: Wertz, O.

    Inst. d'Astrophys. et de Geophys., Lie`ge, Institut d'Astrophysique et de Ge´ophysique Alle´e du 6 Aou^t 17 Sart Tilman Ba^t. B5c, Lie`ge B-4000 Belgium

  • Author: Zimmer, F.

    Heidelberg University

  • Author: Albrow, M. D.

    University of Canterbury

  • Author: Batista, V.

    Ohio State University

  • Author: Brillant, S.

    European Southern Observatory

  • Author: Caldwell, J. A. R.

    McDonald Obs., Fort Davis, TX, McDonald Observatory 16120 State Hwy Spur 78 #2, Fort Davis TX 79334 USA

  • Author: Calitz, J. J.

    Dept. of Phys., Univ. of the Free State, Bloemfontein, University of the Free State, Department of Physics P.O. Box 339, Bloemfontein 9300 South Africa

  • Author: Cassan, A.

    Inst. d'Astrophys. de Paris, Univ. Pierre & Marie Curie, Paris, Universite´ Pierre & Marie Curie, Institut d'Astrophysique de Paris UMR7095 CNRS 98 bis boulevard Arago, Paris F-75014 France

  • Author: Cole, A.

    University of Tasmania

  • Author: Cook, K. H.

    Lawrence Livermore National Laboratory

  • Author: Corrales, E.

    Inst. d'Astrophys. de Paris, Univ. Pierre & Marie Curie, Paris, Universite´ Pierre & Marie Curie, Institut d'Astrophysique de Paris UMR7095 CNRS 98 bis boulevard Arago, Paris F-75014 France

  • Author: Coutures, Ch

    Inst. d'Astrophys. de Paris, Univ. Pierre & Marie Curie, Paris, Universite´ Pierre & Marie Curie, Institut d'Astrophysique de Paris UMR7095 CNRS 98 bis boulevard Arago, Paris F-75014 France

  • Author: Dieters, S.

    Inst. d'Astrophys. de Paris, Univ. Pierre & Marie Curie, Paris, Universite´ Pierre & Marie Curie, Institut d'Astrophysique de Paris UMR7095 CNRS 98 bis boulevard Arago, Paris F-75014 France

  • Author: Dominis Prester, D.

    University of Rijeka

  • Author: Donatowicz, J.

    Vienna University of Technology

  • Author: Fouque´, P.

    LATT, Univ. de Toulouse, Toulouse, Universite´ de Toulouse, LATT 14 Avenue Edouard Belin, Toulouse F-31400 France

  • Author: Greenhill, J.

    University of Tasmania

  • Author: Hill, K.

    University of Tasmania

  • Author: Hoffman, M.

    Dept. of Phys., Univ. of the Free State, Bloemfontein, University of the Free State, Department of Physics P.O. Box 339, Bloemfontein 9300 South Africa

  • Author: Kane, S. R.

    California Institute of Technology

  • Author: Kubas, D.

    Inst. d'Astrophys. de Paris, Univ. Pierre & Marie Curie, Paris, Universite´ Pierre & Marie Curie, Institut d'Astrophysique de Paris UMR7095 CNRS 98 bis boulevard Arago, Paris F-75014 France

  • Author: Marquette, J.-B

    Inst. d'Astrophys. de Paris, Univ. Pierre & Marie Curie, Paris, Universite´ Pierre & Marie Curie, Institut d'Astrophysique de Paris UMR7095 CNRS 98 bis boulevard Arago, Paris F-75014 France

  • Author: Martin, R.

    Perth Obs., Perth, WA, Perth Observatory Walnut Road Bickley, Perth WA 6076 Australia

  • Author: Meintjes, P.

    Dept. of Phys., Univ. of the Free State, Bloemfontein, University of the Free State, Department of Physics P.O. Box 339, Bloemfontein 9300 South Africa

  • Author: Menzies, J.

    South African Astron. Obs., Observatory, South African Astronomical Observatory P.O. Box 9, Observatory 7935 South Africa

  • Author: Pollard, K. R.

    University of Canterbury

  • Author: Sahu, K. C.

    Space Telescope Sci. Inst., Baltimore, MD, Space Telescope Science Institute 3700 San Martin Dr., Baltimore MD 21218 USA

  • Author: Wambsganss, J.

    Heidelberg University

  • Author: Williams, A.

    Perth Obs., Perth, WA, Perth Observatory Walnut Road Bickley, Perth WA 6076 Australia

  • Author: Vinter, C.

    University of Copenhagen

  • Author: Zub, M.

    Heidelberg University

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Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q <0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 ± 0.01 M⊙ and 0.019 ± 0.002 M⊙ for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches.
Original languageEnglish
JournalAstrophysical Journal
Publication date2012
Volume760:116
Issue2
Pages1-10
Number of pages10
ISSN0004-637X
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 5
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