期刊
ASTROPHYSICAL JOURNAL
卷 723, 期 1, 页码 81-88出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/723/1/81
关键词
gravitational lensing: micro
资金
- National Research Foundation of Korea [2009-0081561]
- Korea Astronomy and Space Science Institute
- NSF [AST-0757888]
- NASA [NNG04GL51G]
- Royal Society University
- [JSPS20740104]
- [JSPS19340058]
- [JSPS20340052]
- [JSPS18253002]
- STFC [PP/F000057/1, PP/D000955/1, ST/G009465/1, ST/H002391/1, PP/E001149/1, ST/G002355/1, ST/G001987/1, PP/E002137/1] Funding Source: UKRI
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0757888] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1009621] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/G002355/1, PP/D000955/1, ST/H002391/1, ST/G001987/1, PP/F000057/1, ST/G009465/1, PP/E001149/1, PP/E002137/1] Funding Source: researchfish
We report the result of the analysis of a dramatic repeating gravitational microlensing event OGLE-2009-BLG-092/MOA-2009-BLG-137, for which the light curve is characterized by two distinct peaks with perturbations near both peaks. We find that the event is produced by the passage of the source trajectory over the central perturbation regions associated with the individual components of a wide-separation binary. The event is special in the sense that the second perturbation, occurring similar to 100 days after the first, was predicted by the real-time analysis conducted after the first peak, demonstrating that real-time modeling can be routinely done for binary and planetary events. With the data obtained from follow-up observations covering the second peak, we are able to uniquely determine the physical parameters of the lens system. We find that the event occurred on a bulge clump giant and it was produced by a binary lens composed of a K-and M-type main-sequence stars. The estimated masses of the binary components are M-1 = 0.69 +/- 0.11 M-circle dot and M-2 = 0.36 +/- 0.06 M-circle dot, respectively, and they are separated in projection by r(perpendicular to) = 10.9 +/- 1.3 AU. The measured distance to the lens is D-L = 5.6 +/- 0.7 kpc. We also detect the orbital motion of the lens system.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据