| CHARACTERIZING LOW-MASS BINARIES FROM OBSERVATION OF LONG-TIMESCALE CAUSTIC-CROSSING GRAVITATIONAL MICROLENSING EVENTS | |
| Shin, IG; Han, C; Choi, JY; Udalski, A; Sumi, T; Gould, A; Bozza, V; Dominik, M; Fouque, P; Horne, K; Szymanski, MK; Kubiak, M; Soszynski, I; Pietrzynski, G; Poleski, R; Ulaczyk, K; Pietrukowicz, P; Kozllowski, S; Skowron, J; Wyrzykowski, L; Collaboration, O; Abe, F; Bennett, DP; Bond, IA; Botzler, CS; Chote, P; Freeman, M; Fukui, A; Furusawa, K; Itow, Y; Kobara, S; Ling, CH; Masuda, K; Matsubara, Y; Miyake, N; Muraki, Y; Ohmori, K; Ohnishi, K; Rattenbury, NJ; Saito, T; Sullivan, DJ; Suzuki, D; Suzuki, K; Sweatman, WL; Takino, S; Tristram, PJ; Wada, K; Yock, PCM; Bramich, DM; Snodgrass, C; Steele, IA; Street, RA; Tsapras, Y; Alsubai, KA; Browne, P; Burgdorf, MJ; Novati, SC; Dodds, P; Dreizler, S; Fang XS(房祥松); Grundahl, F; Gu SH(顾盛宏); Hardis, S; Harpsoe, K; Hinse, TC; Hornstrup, A; Hundertmark, M; Jessen-Hansen, J; Jorgensen, UG; Kains, N; Kerins, E; Liebig, C; Lund, M; Lunkkvist, M; Mancini, L; Mathiasen, M; Penny, MT; Rahvar, S; Ricci, D; Scarpetta, G; Skottfelt, J; Southworth, J; Surdej, J; Tregloan-Reed, J; Wambsganss, J; Wertz, O; Almeida, LA; Batista, V; Christie, G; Depoy, DL; Dong, S; Gaudi, BS; Henderson, C; Jablonski, F; Lee, CU; McCormick, J; McGregor, D; Moorhouse, D; Natusch, T; Ngan, H; Park, SY; Pogge, RW; Tan, TG; Thornley, G; Yee, JC; Albrow, MD; Bachelet, E; Beaulieu, JP; Brillant, S; Cassan, A; Cole, AA; Corrales, E; Coutures, C; Dieters, S; Prester, DD; Donatowicz, J; Greenhill, J; Kubas, D; Marquette, JB; Menzies, JW; Sahu, KC; Zub, M; Shin, IG (reprint author), Chungbuk Natl Univ, Inst Astrophys, Dept Phys, Cheongju 371763, South Korea. | |
| 发表期刊 | ASTROPHYSICAL JOURNAL
 |
| 2012-08-20 | |
| 卷号 | 755期号:2 |
| DOI | 10.1088/0004-637X/755/2/91 |
| 产权排序 | 第29完成单位 |
| 收录类别 | SCI |
| 关键词 | Binaries: General Gravitational Lensing: Micro |
| 摘要 | Despite the astrophysical importance of binary star systems, detections are limited to those located in small ranges of separations, distances, and masses and thus it is necessary to use a variety of observational techniques for a complete view of stellar multiplicity across a broad range of physical parameters. In this paper, we report the detections and measurements of two binaries discovered from observations of microlensing events MOA-2011-BLG-090 and OGLE-2011-BLG-0417. Determinations of the binary masses are possible by simultaneously measuring the Einstein radius and the lens parallax. The measured masses of the binary components are 0.43M(circle dot) and 0.39M(circle dot) for MOA-2011-BLG-090 and 0.57M(circle dot) and 0.17M(circle dot) for OGLE-2011-BLG-0417 and thus both lens components of MOA-2011-BLG-090 and one component of OGLE-2011-BLG-0417 are M dwarfs, demonstrating the usefulness of microlensing in detecting binaries composed of low-mass components. From modeling of the light curves considering full Keplerian motion of the lens, we also measure the orbital parameters of the binaries. The blended light of OGLE-2011-BLG-0417 comes very likely from the lens itself, making it possible to check the microlensing orbital solution by follow-up radial-velocity observation. For both events, the caustic-crossing parts of the light curves, which are critical for determining the physical lens parameters, were resolved by high-cadence survey observations and thus it is expected that the number of microlensing binaries with measured physical parameters will increase in the future. |
| 项目资助者 | Creative Research Initiative Program of National Research Foundation of Korea [2009-0081561] ; European Research Council under the European Community [246678] ; JSPS [JSPS23540339, JSPS19340058] ; German Research Foundation (DFG) ; Communaute francaise de Belgique Actions de recherche concertees-Academie universitaire Wallonie-Europe ; Qatar Foundation through QNRF [NPRP-09-476-1-78] ; European Union [268421] ; Danish Natural Science Foundation (FNU) ; NSF [AST-1103471] ; NASA [NNG04GL51G] ; National Science Foundation Graduate Research Fellowship [2009068160] ; California Institute of Technology (Caltech) ; KRCF Young Scientist Research Fellowship Program ; Korea Astronomy and Space Science Institute (KASI) [2012-1-410-02] ; [JSPS22403003] ; [JSPS23340064] ; [JSPS23340044] |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-637X |
| URL | 查看原文 |
| WOS记录号 | WOS:000307791400008 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | SOLAR-TYPE STARS ; LENS ; PHOTOMETRY ; SYSTEMS ; MULTIPLICITY ; RESOLUTION ; ROTATION ; DISTANCE ; PLANETS ; SEARCH |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5218 |
| 专题 | 恒星物理研究组 |
| 通讯作者 | Shin, IG (reprint author), Chungbuk Natl Univ, Inst Astrophys, Dept Phys, Cheongju 371763, South Korea. |
| 推荐引用方式 GB/T 7714 | Shin, IG,Han, C,Choi, JY,et al. CHARACTERIZING LOW-MASS BINARIES FROM OBSERVATION OF LONG-TIMESCALE CAUSTIC-CROSSING GRAVITATIONAL MICROLENSING EVENTS[J]. ASTROPHYSICAL JOURNAL,2012,755(2). |
| APA | Shin, IG.,Han, C.,Choi, JY.,Udalski, A.,Sumi, T.,...&Shin, IG .(2012).CHARACTERIZING LOW-MASS BINARIES FROM OBSERVATION OF LONG-TIMESCALE CAUSTIC-CROSSING GRAVITATIONAL MICROLENSING EVENTS.ASTROPHYSICAL JOURNAL,755(2). |
| MLA | Shin, IG,et al."CHARACTERIZING LOW-MASS BINARIES FROM OBSERVATION OF LONG-TIMESCALE CAUSTIC-CROSSING GRAVITATIONAL MICROLENSING EVENTS".ASTROPHYSICAL JOURNAL 755.2(2012). |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| CHARACTERIZING LOW-M（1927KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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