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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Characterizing lenses and lensed stars of high-magnification single-lens gravitational microlensing events with lenses passing over source stars
Astrophysical Journal, Volume 751, No. 1, Article 41, Year 2012
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Description
We present the analysis of the light curves of nine high-magnification single-lens gravitational microlensing events with lenses passing over source stars, including OGLE-2004-BLG-254, MOA-2007-BLG-176, MOA-2007-BLG-233/OGLE- 2007-BLG-302, MOA-2009-BLG-174, MOA-2010-BLG-436, MOA-2011-BLG-093, MOA-2011-BLG-274, OGLE-2011-BLG-0990/MOA-2011-BLG-300, and OGLE-2011-BLG-1101/ MOA-2011-BLG-325. For all of the events, we measure the linear limb-darkening coefficients of the surface brightness profile of source stars by measuring the deviation of the light curves near the peak affected by the finite-source effect. For seven events, we measure the Einstein radii and the lens-source relative proper motions. Among them, five events are found to have Einstein radii of less than 0.2 mas, making the lenses very low mass star or brown dwarf candidates. For MOA-2011-BLG-274, especially, the small Einstein radius of θE 0.08 mas combined with the short timescale of t E 2.7days suggests the possibility that the lens is a free-floating planet. For MOA-2009-BLG-174, we measure the lens parallax and thus uniquely determine the physical parameters of the lens. We also find that the measured lens mass of 0.84 M ⊙ is consistent with that of a star blended with the source, suggesting that the blend is likely to be the lens. Although we did not find planetary signals for any of the events, we provide exclusion diagrams showing the confidence levels excluding the existence of a planet as a function of the separation and mass ratio. © 2012. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Choi, Joon-young
South Korea, Cheongju
Chungbuk National University
Shin, In-gu
South Korea, Cheongju
Chungbuk National University
Park, S. Y.
South Korea, Cheongju
Chungbuk National University
Han, Cheongho
South Korea, Cheongju
Chungbuk National University
Gould, Andrew P.
United States, Columbus
The Ohio State University
Sumi, Takahiro
Japan, Suita
Osaka University
Udalski, Andrzej
Poland, Warsaw
University of Warsaw
Beaulieu, Jean Philippe H.
France, Paris
Sorbonne Université
Street, Rachel A.
United States, Santa Barbara
Las Cumbres Observatory Global Telescope Network, Inc
Dominik, Martin
United Kingdom, St Andrews
University of st Andrews
Allen, William H.
Unknown Affiliation
Almeida, Leonardo Andrade
Brazil, Sao Jose Dos Campos
Instituto Nacional de Pesquisas Espaciais
Bos, Marc
Unknown Affiliation
Christie, Grant W.
New Zealand, Auckland
Stardome Observatory, Auckland
DePoy, Darren L.
United States, College Station
Texas A&m University
Dong, Subo
United States, Princeton
Institute for Advanced Study
Drummond, John
New Zealand, Gisborne
Possum Observatory
Gal-Yam, Avishay
Israel, Rehovot
Weizmann Institute of Science Israel
Gaudi, B. Scott
United States, Columbus
The Ohio State University
Henderson, Calen B.
United States, Columbus
The Ohio State University
Hung, Liwei
United States, Los Angeles
University of California, Los Angeles
Jablonski, Francisco J.
Brazil, Sao Jose Dos Campos
Instituto Nacional de Pesquisas Espaciais
Janczak, Julia
United States, Columbus
The Ohio State University
Lee, Chung-uk
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Mallia, Franco
Chile
Campo Catino Austral Observatory
Maury, Alain
Chile
Campo Catino Austral Observatory
McCormick, Jennie M.
New Zealand, Auckland
Farm Cove Observatory
McGregor, D.
United States, Columbus
The Ohio State University
Monard, Libert A.G.Berto
South Africa, Pretoria
Bronberg Observatory
Moorhouse, D. M.
Unknown Affiliation
Muñoz, José Antonio
Spain, Valencia
Universitat de València
Natusch, Timothy J.
New Zealand, Auckland
Stardome Observatory, Auckland
Nelson, Cailin A.
United States, Tucson
The University of Arizona
Park, Byeong-gon
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Pogge, Richard W.
United States, Columbus
The Ohio State University
Tg Tan, T. G.
Australia, Perth
Perth Exoplanet Survey Telescope
Thornley, G.
Unknown Affiliation
Yee, Jennifer C.
United States, Columbus
The Ohio State University
Abe, Fumio
Japan, Nagoya
Nagoya University
Barnard, Ellen
New Zealand, Auckland
The University of Auckland
Baudry, Julie
New Zealand, Auckland
The University of Auckland
Bennett, David P.
United States, Notre Dame
University of Notre Dame
Bond, Ian A.
New Zealand, Auckland
Massey University Auckland
Botzler, Christine S.
New Zealand, Auckland
The University of Auckland
Freeman, Matthew S.R.
New Zealand, Auckland
The University of Auckland
Fukui, Akihiko
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Furusawa, Kei
Japan, Nagoya
Nagoya University
Hayashi, Fumiya
Japan, Nagoya
Nagoya University
Hearnshaw, John B.
New Zealand, Christchurch
University of Canterbury
Hosaka, Shun
Japan, Nagoya
Nagoya University
Itow, Yoshitaka
Japan, Nagoya
Nagoya University
Kamiya, Koki
Japan, Nagoya
Nagoya University
Kilmartin, Pamela M.
New Zealand, Lake Tekapo
University of Canterbury Mount John Observatory
Kobara, Shuhei
Japan, Nagoya
Nagoya University
Korpela, Aarno V.
New Zealand, Wellington
Victoria University of Wellington
Lin, Wei
New Zealand, Auckland
Massey University Auckland
Ling, Chohong
New Zealand, Auckland
Massey University Auckland
Makita, Shota
Japan, Nagoya
Nagoya University
Masuda, Kimiaki
Japan, Nagoya
Nagoya University
Matsubara, Yutaka
Japan, Nagoya
Nagoya University
Miyake, Noriyuki
Japan, Nagoya
Nagoya University
Muraki, Y.
Japan, Kobe
Konan University
Nagaya, Maiko
Japan, Nagoya
Nagoya University
Nishimoto, Kenta
Japan, Nagoya
Nagoya University
Ohnishi, Kouji
Japan, Nagano
National Institute of Technology, Nagano College
Okumura, T.
Japan, Nagoya
Nagoya University
Omori, Kengo
Japan, Nagoya
Nagoya University
Perrott, Yvette C.
New Zealand, Auckland
The University of Auckland
Rattenbury, Nicholas James
New Zealand, Auckland
The University of Auckland
Saito, To
Japan, Tokyo
Tokyo Metropolitan College of Industrial Technology
Skuljan, Ljiljana
New Zealand, Auckland
Massey University Auckland
Sullivan, Denis J.
New Zealand, Wellington
Victoria University of Wellington
Suzuki, Daisuke
Japan, Suita
Osaka University
Suzuki, Kazuya
Japan, Nagoya
Nagoya University
Sweatman, Winston L.
New Zealand, Auckland
Massey University Auckland
Takino, S.
Japan, Nagoya
Nagoya University
Tristram, Paul J.
New Zealand, Lake Tekapo
University of Canterbury Mount John Observatory
Wada, Kohei
Japan, Suita
Osaka University
Yock, C. M.
New Zealand, Auckland
The University of Auckland
Szymánski, Michał K.
Poland, Warsaw
University of Warsaw
Kubiak, Marcin
Poland, Warsaw
University of Warsaw
Pietrzýnski, Grzegorz
Poland, Warsaw
University of Warsaw
Chile, Biobio
Universidad de Concepcion
Soszyński, Igor
Poland, Warsaw
University of Warsaw
Poleski, Radoslaw
Poland, Warsaw
University of Warsaw
Ulaczyk, Krzysztof
Poland, Warsaw
University of Warsaw
Wyrzykowski, Łukasz
Poland, Warsaw
University of Warsaw
United Kingdom, Cambridge
University of Cambridge
Kozłowski, Szymon Z.
Poland, Warsaw
University of Warsaw
Pietrukowicz, Pawełl
Poland, Warsaw
University of Warsaw
Albrow, Michael D.
New Zealand, Christchurch
University of Canterbury
Bachelet, Etienne
France, Paris
Cnrs Centre National de la Recherche Scientifique
Batista, Virginie
United States, Columbus
The Ohio State University
Bennett, Clara S.
United States, Greenbelt
Nasa Goddard Space Flight Center
Bowens-Rubin, Rachel
United States, Cambridge
Massachusetts Institute of Technology
Brillant, Stéphanie
Chile, Santiago
European Southern Observatory Santiago
Cassan, Arnaud
France, Paris
Sorbonne Université
Cole, Andrew A.
Australia, Hobart
University of Tasmania
Corrales, E.
France, Paris
Sorbonne Université
Coutures, Christian
France, Paris
Sorbonne Université
Dieters, Stefan W.B.
France, Paris
Sorbonne Université
France, Paris
Cnrs Centre National de la Recherche Scientifique
Dominis-Prester, Dijana
Croatia, Rijeka
University of Rijeka
Donatowicz, J.
Austria, Vienna
Technische Universität Wien
Fouqué, Pascal
France, Paris
Cnrs Centre National de la Recherche Scientifique
Greenhill, John G.
Australia, Hobart
University of Tasmania
Kane, Stephen R.
United States, Washington, D.c.
National Aeronautics and Space Administration
Menzies, John W.
South Africa, Cape Town
South African Astronomical Observatory
Sahu, Kailash C.
United States, Baltimore
Space Telescope Science Institute
Wambsganss, Joachim
Germany, Heidelberg
Universität Heidelberg
Williams, Andrew J.
Australia, Bickley
Perth Observatory
Zub, Marta
Germany, Heidelberg
Universität Heidelberg
Allan, Alasdair
United Kingdom, Exeter
University of Exeter
Bramich, Daniel M.
Germany, Garching Bei Munchen
European Southern Observatory
Browne, Paul
United Kingdom, St Andrews
University of st Andrews
Clay, Neil R.
United Kingdom, Liverpool
Liverpool John Moores University
Fraser, Stephen N.
United Kingdom, Liverpool
Liverpool John Moores University
Hörne, Keith D.
United Kingdom, St Andrews
University of st Andrews
Kains, Noé
Germany, Garching Bei Munchen
European Southern Observatory
Mottram, Christopher J.
United Kingdom, Liverpool
Liverpool John Moores University
Snodgrass, Colin
Chile, Santiago
European Southern Observatory Santiago
Germany, Gottingen
Max Planck Institute for Solar System Research
Steele, Iain A.
United Kingdom, Liverpool
Liverpool John Moores University
Tsapras, Yiannis
United States, Santa Barbara
Las Cumbres Observatory Global Telescope Network, Inc
Alsubai, Khalid A.
Qatar, Doha
Qatar Foundation
Bozza, Valerio
Italy, Salerno
Università Degli Studi Di Salerno
Burgdorf, Martin J.
Germany, Stuttgart
Universität Stuttgart
Calchi-Novati, Sebastiano
Italy, Salerno
Università Degli Studi Di Salerno
Dodds, Peter
United Kingdom, St Andrews
University of st Andrews
Dreizler, Stefan
Germany, Gottingen
Georg-august-universität Göttingen
Finet, François
Belgium, Liege
Université de Liège
Glitrup, M.
Denmark, Aarhus
Aarhus Universitet
Grundahl, Frank
Denmark, Aarhus
Aarhus Universitet
Hardis, S.
Denmark, Copenhagen
Københavns Universitet
Harpsøe, Kennet B.W.
Denmark, Copenhagen
Københavns Universitet
Denmark, Copenhagen
Statens Naturhistoriske Museum
Hinse, Tobias Cornelius
South Korea, Daejeon
Korea Astronomy and Space Science Institute
Denmark, Copenhagen
Københavns Universitet
Hundertmark, Markus P.G.
United Kingdom, St Andrews
University of st Andrews
Germany, Gottingen
Georg-august-universität Göttingen
Jörgensen, Uffe Gråe
Denmark, Copenhagen
Københavns Universitet
Kerins, Eamonn J.
United Kingdom, Manchester
The University of Manchester
Liebig, Christine
Germany, Heidelberg
Universität Heidelberg
Maier, Gernot
Germany, Heidelberg
Universität Heidelberg
Mancini, Luigi
Italy, Salerno
Università Degli Studi Di Salerno
Germany, Heidelberg
Max Planck Institute for Astronomy
Mathiasen, M.
Denmark, Copenhagen
Københavns Universitet
Penny, Matthew T.
United Kingdom, Manchester
The University of Manchester
Rahvar, Sohrab
Iran, Tehran
Sharif University of Technology
Canada, Waterloo
Perimeter Institute for Theoretical Physics
Ricci, D.
Belgium, Liege
Université de Liège
Scarpetta, Gaetano
Italy, Salerno
Università Degli Studi Di Salerno
Skottfelt, Jesper F.
Denmark, Copenhagen
Københavns Universitet
Surdej, Jean
Belgium, Liege
Université de Liège
Southworth, John K.
United Kingdom, Keele
Keele University
Statistics
Citations: 28
Authors: 146
Affiliations: 63
Identifiers
Doi:
10.1088/0004-637X/751/1/41
ISSN:
0004637X