OGLE-2005-BLG-018: CHARACTERIZATION OF FULL PHYSICAL AND ORBITAL PARAMETERS OF A GRAVITATIONAL BINARY LENS
OGLE-2005-BLG-018: CHARACTERIZATION OF FULL PHYSICAL AND ORBITAL PARAMETERS OF A GRAVITATIONAL BINARY LENS
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OGLE-2005-BLG-018：引力双星透镜的完整物理和轨道参数的表征
DOI：
10.1088/0004-637x/735/2/85
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
K. Woller
中科院分区：
文献类型：
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作者：
I. Shin;A. Udalski;C. Han;A. Gould;M. Dominik;P. Fouqué;M. Kubiak;M. Szymański;G. Pietrzynki;I. Soszyński;K. Ulaczyk;Ł. Wyrzykowski;D. Depoy;S. Dong;B. Gaudi;C.‐U. Lee;B.;R. Pogge;M. Albrow;A. Allan;J. Beaulieu;D. Bennett;M. Bode;D. Bramich;S. Brillant;M. Burgdorf;H. Calitz;A. Cassan;K. Cook;E. Corrales;C. Coutures;N. Desort;S. Dieters;D. Dominis Prester;J. Donatowicz;S. Fraser;J. Greenhill;K. Hill;M. Hoffman;K. Horne;U. G. Jörgensen;S. Kane;D. Kubas;J. Marquette;R. Martin;P. Meintjes;J. Menzies;C. Mottram;T. Naylor;K. Pollard;K. Sahu;C. Snodgrass;I. Steele;C. Vinter;J. Wambsganss;A. Williams;K. Woller
本文介绍了引力双星透镜事件OGLE-2005-BLG-018的分析结果。事件的光变曲线由两个相邻的强特征和一个与强特征分离的弱特征表征。光变曲线与基于标准二元参数的最佳拟合模型存在明显偏差。为了解释偏差，我们测试模型，包括各种高阶效应的观察者，源，和透镜的运动。由此，我们发现在描述光变曲线时，必须考虑透镜的轨道运动。通过建立考虑视差效应和开普勒轨道运动的光变曲线模型，不仅可以测量光学系统的物理参数，而且可以得到完整的透镜系统的轨道解。结果表明，这一事件是由位于银河系凸起的双星透镜产生的，距离地球6.7 ± 0.3kpc。质量分别为0.9 ± 0.3 M和0.5 ± 0.1 M的单个透镜组件以a = 2.5 ± 1.0 Au的半长轴分开，并以P = 3.1 ± 1.3 yr的周期相互绕轨道运行。这一事件表明，它是可能的提取详细信息的二元透镜系统，以及解决透镜光变曲线。
We present the result of the analysis of the gravitational binary-lensing event OGLE-2005-BLG-018. The light curve of the event is characterized by two adjacent strong features and a single weak feature separated from the strong features. The light curve exhibits noticeable deviations from the best-fit model based on standard binary parameters. To explain the deviation, we test models including various higher-order effects of the motions of the observer, source, and lens. From this, we find that it is necessary to account for the orbital motion of the lens in describing the light curve. From modeling the light curve considering the parallax effect and Keplerian orbital motion, we are able to not only measure the physical parameters but also to find a complete orbital solution of the lens system. It is found that the event was produced by a binary lens located in the Galactic bulge with a distance of 6.7 ± 0.3 kpc from the Earth. The individual lens components with masses 0.9 ± 0.3 M☉ and 0.5 ± 0.1 M☉ are separated with a semi-major axis of a = 2.5 ± 1.0 AU and orbiting each other with a period P = 3.1 ± 1.3 yr. This event demonstrates that it is possible to extract detailed information about binary lens systems from well-resolved lensing light curves.
通过高倍放大通道发现的微透镜双星
DOI：
10.1088/0004-637x/746/2/127
发表时间：
2012
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Shin I
通讯作者：
Shin I