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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Gravitational binary-lens events with prominent effects of lens orbital motion
Astrophysical Journal, Volume 778, No. 2, Article 134, Year 2013
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Description
Gravitational microlensing events produced by lenses composed of binary masses are important because they provide a major channel for determining physical parameters of lenses. In this work, we analyze the light curves of two binary-lens events, OGLE-2006-BLG-277 and OGLE-2012-BLG-0031, for which the light curves exhibit strong deviations from standard models. From modeling considering various second-order effects, we find that the deviations are mostly explained by the effect of the lens orbital motion. We also find that lens parallax effects can mimic orbital effects to some extent. This implies that modeling light curves of binary-lens events not considering orbital effects can result in lens parallaxes that are substantially different from actual values and thus wrong determinations of physical lens parameters. This demonstrates the importance of routine consideration of orbital effects in interpreting light curves of binary-lens events. It is found that the lens of OGLE-2006-BLG-277 is a binary composed of a low-mass star and a brown dwarf companion. © 2013. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Park, Hyuk
Unknown Affiliation
Udalski, Andrzej
Unknown Affiliation
Han, Cheongho
Unknown Affiliation
Gould, Andrew P.
Unknown Affiliation
Beaulieu, Jean Philippe H.
Unknown Affiliation
Tsapras, Yiannis
Unknown Affiliation
Szymánski, Michał K.
Unknown Affiliation
Kubiak, Marcin
Unknown Affiliation
Soszyński, Igor
Unknown Affiliation
Pietrzýnski, Grzegorz
Unknown Affiliation
Poleski, Radoslaw
Unknown Affiliation
Ulaczyk, Krzysztof
Unknown Affiliation
Pietrukowicz, Pawełl
Unknown Affiliation
Kozłowski, Szymon Z.
Unknown Affiliation
Skowron, Jan
Unknown Affiliation
Wyrzykowski, Łukasz
Unknown Affiliation
Choi, Joon-young
Unknown Affiliation
DePoy, Darren L.
Unknown Affiliation
Dong, Subo
Unknown Affiliation
Gaudi, B. Scott
Unknown Affiliation
Hwang, Kyu-ha
Unknown Affiliation
Jung, Younkil
Unknown Affiliation
Kavka, A.
Unknown Affiliation
Lee, Chung-uk
Unknown Affiliation
Monard, Libert A.G.Berto
Unknown Affiliation
Park, Byeong-gon
Unknown Affiliation
Pogge, Richard W.
Unknown Affiliation
Porritt, I.
Unknown Affiliation
Shin, In-gu
Unknown Affiliation
Yee, Jennifer C.
Unknown Affiliation
Albrow, Michael D.
Unknown Affiliation
Bennett, David P.
Unknown Affiliation
Caldwell, John A.R.
Unknown Affiliation
Cassan, Arnaud
Unknown Affiliation
Coutures, Christian
Unknown Affiliation
Dominis, D.
Unknown Affiliation
Donatowicz, J.
Unknown Affiliation
Fouqué, Pascal
Unknown Affiliation
Greenhill, John G.
Unknown Affiliation
Huber, Mark E.C.
Unknown Affiliation
Jörgensen, Uffe Gråe
Unknown Affiliation
Kane, Stephen R.
Unknown Affiliation
Kubas, Daniel
Unknown Affiliation
Marquette, Jean Baptiste
Unknown Affiliation
Menzies, John W.
Unknown Affiliation
Pitrou, Cyril
Unknown Affiliation
Pollard, Karen R.
Unknown Affiliation
Sahu, Kailash C.
Unknown Affiliation
Wambsganss, Joachim
Unknown Affiliation
Williams, Andrew J.
Unknown Affiliation
Zub, Marta
Unknown Affiliation
Allan, Alasdair
Unknown Affiliation
Bramich, Daniel M.
Unknown Affiliation
Browne, Paul
Unknown Affiliation
Dominik, Martin
Unknown Affiliation
Hörne, Keith D.
Unknown Affiliation
Hundertmark, Markus P.G.
Unknown Affiliation
Kains, Noé
Unknown Affiliation
Snodgrass, Colin
Unknown Affiliation
Steele, Iain A.
Unknown Affiliation
Street, Rachel A.
Unknown Affiliation
Statistics
Citations: 61
Authors: 61
Affiliations: 33
Identifiers
Doi:
10.1088/0004-637X/778/2/134
ISSN:
0004637X
e-ISSN:
15384357