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.

    University of Warsaw

  • Author: Sumi, T.

    Osaka University

  • Author: Dominik, M.

    University of St Andrews

  • Author: Beaulieu, J.-P

    Université Pierre et Marie Curie

  • 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.

    University of Warsaw

  • Author: Kubiak, M.

    University of Warsaw

  • Author: Soszyn´ski, I.

    University of Warsaw

  • Author: Pietrzyn´ski, G.

    University of Warsaw

  • Author: Poleski, R.

    University of Warsaw

  • Author: Ulaczyk, K.

    University of Warsaw

  • Author: Pietrukowicz, P.

    University of Warsaw

  • Author: Kozłowski, S.

    University of Warsaw

  • Author: Skowron, J.

    Ohio State University

  • Author: Wyrzykowski, Ł.

    University of Warsaw

  • Author: Abe, F.

    Nagoya University

  • Author: Bennett, D. P.

    University of Notre Dame

  • 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.

    Konan University

  • Author: Nagaya, M.

    Nagoya University

  • Author: Nishimoto, K.

    Nagoya University

  • Author: Ohnishi, K.

    Nagano National College of Technology

  • 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 College of Industrial Technology

  • 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 Observatory

  • Author: Depoy, D. L.

    Texas A&M University

  • Author: Dong, S.

    Institute for Advanced Study

  • Author: Gal-Yam, A.

    Weizmann Institute of Science

  • 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.

    Tel Aviv University

  • Author: Maoz, D.

    Tel Aviv University

  • Author: McCormick, J.

    Farm Cove Observatory

  • Author: McGregor, D.

    Ohio State University

  • Author: Moorhouse, D.

    Kumeu Observatory

  • Author: Muñoz, J. A.

    Universidad de Valencia

  • Author: Natusch, T.

    Auckland Observatory

  • 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.

    Tel Aviv University

  • Author: Shvartzvald, Y.

    Tel Aviv University

  • 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 Observatory

  • Author: Malamud, U.

    Tel Aviv University

  • 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 Astronomy and Space Science Institute

  • Author: Park, B.-G

    Korea Astronomy and Space Science Institute

  • Author: Koo, J.-R

    Korea Astronomy and Space Science Institute

  • 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.

    Liverpool John Moores University

  • 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 Operations GmbH

  • Author: Calchi Novati, S.

    Università degli Studi di Salerno

  • Author: Dodds, P.

    University of St Andrews

  • Author: Dreizler, S.

    Göttingen University

  • Author: Fang, X.-S

    Chinese Academy of Sciences

  • Author: Grundahl, F.

    Aarhus University

  • Author: Gu, C.-H

    Chinese Academy of Sciences

  • Author: Hardis, S.

    University of Copenhagen

  • Author: Harpsøe, K.

    University of Copenhagen

  • Author: Hinse, T. C.

    Korea Astronomy and Space Science Institute

  • 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.

    Institut d'Astrophysique et de Géophysique

  • Author: Scarpetta, G.

    Università degli Studi di Salerno

  • Author: Skottfelt, J.

    University of Copenhagen

  • Author: Southworth, J.

    Keele University

  • Author: Surdej, J.

    Institut d'Astrophysique et de Géophysique

  • Author: Tregloan-Reed, J.

    Keele University

  • Author: Wertz, O.

    Institut d'Astrophysique et de Géophysique

  • 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.

    University of the Free State

  • Author: Cassan, A.

    Université Pierre et Marie Curie

  • Author: Cole, A.

    University of Tasmania

  • Author: Cook, K. H.

    Lawrence Livermore National Laboratory

  • Author: Corrales, E.

    Université Pierre et Marie Curie

  • Author: Coutures, Ch

    Université Pierre et Marie Curie

  • Author: Dieters, S.

    Université Pierre et Marie Curie

  • Author: Dominis Prester, D.

    University of Rijeka

  • Author: Donatowicz, J.

    Vienna University of Technology

  • Author: Fouque´, P.

    Université de Toulouse

  • Author: Greenhill, J.

    University of Tasmania

  • Author: Hill, K.

    University of Tasmania

  • Author: Hoffman, M.

    University of the Free State

  • Author: Kane, S. R.

    California Institute of Technology

  • Author: Kubas, D.

    Université Pierre et Marie Curie

  • Author: Marquette, J.-B

    Université Pierre et Marie Curie

  • Author: Martin, R.

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

  • Author: Meintjes, P.

    University of the Free State

  • 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
Volume760:116
Issue number2
Pages (from-to)1-10
Number of pages10
ISSN0004-637X
DOIs
StatePublished - 2012
Peer-reviewedYes
CitationsWeb of Science® Times Cited: 7
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