A method for selecting M dwarfs with an increased likelihood of unresolved ultracool companionship
文献类型：期刊论文
| 作者 | Cook, N. J.1; Pinfield, D. J.1; Marocco, F.1; Burningham, B.1,2; Jones, H. R. A.1; Frith, J.1; Zhong, J.3; Luo, A. L.4 ; Qi, Z. X.3; Lucas, P. W.1
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2016-04-01 |
| 卷号 | 457期号:2页码:2192-2208 |
| 关键词 | methods: observational brown dwarfs stars: low-mass infrared: stars |
| 英文摘要 | Locating ultracool companions to M dwarfs is important for constraining low-mass formation models, the measurement of substellar dynamical masses and radii, and for testing ultracool evolutionary models. We present an optimized method for identifying M dwarfs which may have unresolved ultracool companions. We construct a catalogue of 440 694 M dwarf candidates, from Wide-Field Infrared Survey Explorer, Two Micron All-Sky Survey and Sloan Digital Sky Survey, based on optical- and near-infrared colours and reduced proper motion. With strict reddening, photometric and quality constraints we isolate a subsample of 36 898 M dwarfs and search for possible mid-infrared M dwarf + ultracool dwarf candidates by comparing M dwarfs which have similar optical/near-infrared colours (chosen for their sensitivity to effective temperature and metallicity). We present 1082 M dwarf + ultracool dwarf candidates for follow-up. Using simulated ultracool dwarf companions to M dwarfs, we estimate that the occurrence of unresolved ultracool companions amongst our M dwarf + ultracool dwarf candidates should be at least four times the average for our full M dwarf catalogue. We discuss possible contamination and bias and predict yields of candidates based on our simulations. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000373580500082 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5362]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Univ Hertfordshire, Sci & Technol Res Inst, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England 2.NASA, Ames Res Ctr, Mail Stop 245-3, Moffett Field, CA 94035 USA 3.Chinese Acad Sci, SHAO, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 4.Chinese Acad Sci, NAO, Key Lab Opt Astron, Datun Rd 20A, Beijing 100012, Peoples R China 5.Millennium Inst Astrophys, Av Vicua Mackenna 4860, Santiago 7820436, Chile 6.Univ Valparaiso, Ist Fis & Astron, Ave Gran Bretana 1111,Casilla 5030, Valparaiso, Chile 7.Shandong Univ, Weihai 264209, Peoples R China 8.Ist Nazl Astrofis, Osservatorio Astron Torino, Via Osservatorio, I-10023 Turin, Italy |
| 推荐引用方式 GB/T 7714 | Cook, N. J.,Pinfield, D. J.,Marocco, F.,et al. A method for selecting M dwarfs with an increased likelihood of unresolved ultracool companionship[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,457(2):2192-2208. |
| APA | Cook, N. J..,Pinfield, D. J..,Marocco, F..,Burningham, B..,Jones, H. R. A..,...&Smart, R. L..(2016).A method for selecting M dwarfs with an increased likelihood of unresolved ultracool companionship.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,457(2),2192-2208. |
| MLA | Cook, N. J.,et al."A method for selecting M dwarfs with an increased likelihood of unresolved ultracool companionship".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 457.2(2016):2192-2208. |
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来源：国家天文台
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