Gravitational Binary-lens Events with Prominent Effects of Lens Orbital Motion
H. Park, A. Udalski, C. Han, A. Gould, J. -P. Beaulieu, Y. Tsapras, M. K. Szymański, M. Kubiak, I. Soszyński, G. Pietrzyński, R. Poleski, K. Ulaczyk, P. Pietruk… 展开作者
H. Park, A. Udalski, C. Han, A. Gould, J. -P. Beaulieu, Y. Tsapras, M. K. Szymański, M. Kubiak, I. Soszyński, G. Pietrzyński, R. Poleski, K. Ulaczyk, P. Pietrukowicz, S. Kozłowski, J. Skowron, Ł. Wyrzykowski, J. -Y. Choi, D. L. Depoy, Subo Dong, B. S. Gaudi, K. -H. Hwang, Y. K. Jung, A. Kavka, C. -U. Lee, L. A. G. Monard, B. -G. Park, R. W. Pogge, I. Porritt, I. -G. Shin, J. C. Yee, M. D. Albrow, D. P. Bennett, J. A. R. Caldwell, A. Cassan, C. Coutures, D. Dominis, J. Donatowicz, P. Fouqué, J. Greenhill, M. Huber, U. G. Jørgensen, S. Kane, D. Kubas, J. -B. Marquette, J. Menzies, C. Pitrou, K. R. Pollard, K. C. Sahu, J. Wambsganss, A. Williams, M. Zub, A. Allan, D. M. Bramich, P. Browne, M. Dominik, K. Horne, M. Hundertmark, N. Kains, C. Snodgrass, I. A. Steele, R. A. Street
Gravitational microlensing events produced by lenses composed of binary masses are important because they provide a major channel to determine 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.
Gaia20fnr: A binary-lens microlensing event with full orbital motion revealed by four space telescopes
University of Warsaw（华沙大学）；Isaac Newton Group of Telescopes（艾萨克·牛顿望远镜组）；National Centre for Nuclear Research（国家核研究中心）；Zentrum für Astronomie der Universität Heidelberg（海德堡大学天文学中心）；Nicolaus Copernicus University（尼古拉·哥白尼大学）；Vilnius University（维尔纽斯大学）；Université Marie et Louis Pasteur, CNRS, Institut UTINAM UMR 6213（玛丽和路易斯·巴斯德大学、法国国家科学研究中心、UTINAM研究所）；Las Cumbres Observatory（拉斯坎布雷斯天文台）
The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. X. Enigmatic Class of Double Periodic Variables in the Large Magellanic Cloud
The Optical Gravitational Lensing Experiment. Dwarf Novae in the OGLE Data. I. Three New Dwarf Novae: One in the Period Gap and Two Longer Period Objects
Modeling Binary Lenses and Sources with the BAGLE Python Package
University of Maryland（马里兰大学）；NASA Goddard Space Flight Center（NASA戈达德太空飞行中心）；University of California, Berkeley（加州大学伯克利分校）；Observatories of the Carnegie Institution for Science（卡内基科学研究所天文台）
COBALT-BLUE: a fast and accurate model for gravitational self-lensing binary systems
Newcastle University（纽卡斯尔大学）；Durham University（杜伦大学）；University of Southampton（南安普顿大学）；Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences（波兰科学院尼古拉·哥白尼天文学中心）；The Open University（开放大学）；Michigan State University（密歇根州立大学）；University of Washington（华盛顿大学）
