MICROLENSING DISCOVERY OF A POPULATION OF VERY TIGHT, VERY LOW MASS BINARY BROWN DWARFS
文献类型：期刊论文
| 作者 | Choi, JY; Han, C; Udalski, A; Sumi, T; Gaudi, BS; Gould, A; Bennett, DP; Dominik, M; Beaulieu, JP; Tsapras, Y |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2013-05-10 |
| 卷号 | 768期号:2 |
| 关键词 | binaries: general gravitational lensing: micro |
| ISSN号 | 0004-637X |
| 产权排序 | 第三十二完成单位 |
| 通讯作者 | Han, C (reprint author), Chungbuk Natl Univ, Inst Astrophys, Dept Phys, Cheongju 371763, South Korea. |
| 英文摘要 | Although many models have been proposed, the physical mechanisms responsible for the formation of low-mass brown dwarfs (BDs) are poorly understood. The multiplicity properties and minimum mass of the BD mass function provide critical empirical diagnostics of these mechanisms. We present the discovery via gravitational microlensing of two very low mass, very tight binary systems. These binaries have directly and precisely measured total system masses of 0.025 M-circle dot and 0.034 M-circle dot, and projected separations of 0.31 AU and 0.19 AU, making them the lowest-mass and tightest field BD binaries known. The discovery of a population of such binaries indicates that BD binaries can robustly form at least down to masses of similar to 0.02 M-circle dot. Future microlensing surveys will measure a mass-selected sample of BD binary systems, which can then be directly compared to similar samples of stellar binaries. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GRAVITATIONAL LENS ; EXTRASOLAR PLANETS ; GALACTIC BULGE ; SYSTEMS ; EVENTS ; SEARCH ; STARS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-637X/768/2/129/meta;jsessionid=D8734B27DCE238BEAC56FD2B5D5C546D.c1 |
| 语种 | 英语 |
| WOS记录号 | WOS:000318228400032 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/6794]  |
| 专题 | 云南天文台_系外行星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 推荐引用方式 GB/T 7714 | Choi, JY,Han, C,Udalski, A,et al. MICROLENSING DISCOVERY OF A POPULATION OF VERY TIGHT, VERY LOW MASS BINARY BROWN DWARFS[J]. ASTROPHYSICAL JOURNAL,2013,768(2). |
| APA | Choi, JY.,Han, C.,Udalski, A.,Sumi, T.,Gaudi, BS.,...&Gu SH.(2013).MICROLENSING DISCOVERY OF A POPULATION OF VERY TIGHT, VERY LOW MASS BINARY BROWN DWARFS.ASTROPHYSICAL JOURNAL,768(2). |
| MLA | Choi, JY,et al."MICROLENSING DISCOVERY OF A POPULATION OF VERY TIGHT, VERY LOW MASS BINARY BROWN DWARFS".ASTROPHYSICAL JOURNAL 768.2(2013). |
入库方式： OAI收割
来源：云南天文台
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