Article (Scientific journals)
MOA-2010-BLG-311: A planetary candidate below the threshold of reliable detection
Yee, J. C.; Hung, L.-W.; Bond, I. A. et al.
2013In Astrophysical Journal, 769 (1), p. 77
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Keywords :
Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] We analyze MOA-2010-BLG-311, a high magnification (A_max>600) microlensing event with complete data coverage over the peak, making it very sensitive to planetary signals. We fit this event with both a point lens and a 2-body lens model and find that the 2-body lens model is a better fit but with only Delta chi^2~140. The preferred mass ratio between the lens star and its companion is $q=10^(-3.7+/-0.1), placing the candidate companion in the planetary regime. Despite the formal significance of the planet, we show that because of systematics in the data the evidence for a planetary companion to the lens is too tenuous to claim a secure detection. When combined with analyses of other high-magnification events, this event helps empirically define the threshold for reliable planet detection in high-magnification events, which remains an open question.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Yee, J. C.
Hung, L.-W.
Bond, I. A.
Allen, W.
Monard, L. A. G.
Albrow, M. D.
Fouque, P.
Dominik, M.
Tsapras, Y.
Udalski, A.
Gould, A.
Cole, A. A.
Corrales, E.
Coutures, C.
Dieters, S.
Dominis Prester, D.
Donatowicz, J.
Greenhill, J.
Henderson, C. B.
Kubas, D.
Marquette, J.-B.
Dodds, P.
Martin, R.
Menzies, J. W.
Shappee, B.
Williams, A.
Wouters, D.
van Saders, J.
Zub, M.
Street, R. A.
Horne, K.
Bramich, D. M.
Finet, François ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Steele, I. A.
Alsubai, K. A.
Bozza, V.
Browne, P.
Burgdorf, M. J.
Calchi Novati, S.
Gerner, T.
Hardis, S.
Harpsoe, K.
Hessman, F. V.
Hinse, T. C.
Hundertmark, M.
Jorgensen, U. G.
Kains, N.
Zellem, R.
Kerins, E.
Liebig, C.
Mancini, L.
Mathiasen, M.
Penny, M. T.
Proft, S.
Rahvar, S.
Ricci, Davide ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Sahu, K. C.
Scarpetta, G.
Bos, M.
Schafer, S.
Schonebeck, F.
Snodgrass, C.
Southworth, J.
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Wambsgans, J.
Christie, G. W.
DePoy, D. L.
Dong, Subo
Drummond, J.
Gaudi, B. S.
Gorbikov, E.
Han, C.
Kaspi, S.
Klein, N.
Lee, C.-U.
Maoz, D.
McCormick, J.
Moorhouse, D.
Natusch, T.
Nola, M.
Park, B.-G.
Pogge, R. W.
Polishook, D.
Shporer, A.
Shvartzvald, Y.
Skowron, J.
Thornley, G.
Abe, F.
Bennett, D. P.
Botzler, C. S.
Chote, P.
Freeman, M.
Fukui, A.
Furusawa, K.
Harris, P.
Itow, Y.
Ling, C. H.
Masuda, K.
Matsubara, Y.
Miyake, N.
Ohnishi, K.
Rattenbury, N. J.
Saito, To
Sullivan, D. J.
Sumi, T.
Suzuki, D.
Sweatman, W. L.
Tristram, P. J.
Wada, K.
Yock, P. C. M.
Szymanski, M. K.
Soszynski, I.
Kubiak, M.
Poleski, R.
Ulaczyk, K.
Pietrzynski, G.
Wyrzykowski, L.
Bachelet, E.
Batista, V.
Beatty, T. G.
Beaulieu, J.-P.
Bennett, C. S.
Bowens-Rubin, R.
Brillant, S.
Caldwell, J. A. R.
Cassan, A.
More authors (116 more) Less
Language :
English
Title :
MOA-2010-BLG-311: A planetary candidate below the threshold of reliable detection
Publication date :
20 May 2013
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
IOP Publishing, Bristol, United Kingdom
Volume :
769
Issue :
1
Pages :
77
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
28 pages, 6 Figures, 3 Tables. Submitted to ApJ. For a brief video presentation on this paper, please see http://www.youtube.com/user/OSUAstronomy 10/25/2012 - Updated author list
Available on ORBi :
since 08 February 2013

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