The triple degenerate star WD 1704+481
文献类型：期刊论文
| 作者 | Maxted, PFL1; Marsh, TR1; Moran, CKJ1; Han ZW(韩占文)2,3,4
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2000-05-11 |
| 卷号 | 314期号:2页码:334-337 |
| 关键词 | binaries : close binaries : spectroscopic stars : individual : WD 1704+481 white dwarfs |
| ISSN号 | 0035-8711 |
| 产权排序 | 第二完成单位 |
| 通讯作者 | Maxted, PFL |
| 英文摘要 | WD 1704+481 is a visual binary in which both components are white dwarfs. We present spectra of the H alpha line of both stars which show that one component (WD 1704+481.2=Sanduleak B=GR 577) is a close binary with two white dwarf components. Thus, WD 1704+481 is the first known triple degenerate star. From radial velocity measurements of the close binary we find an orbital period of 0.1448 d, a mass ratio, qM(bright)M(faint), of 0.70 +/- 0.03 and a difference in the gravitational redshifts of 11.5 +/- 2.3 km s(-1). The masses of the close pair of white dwarfs predicted by the mass ratio and gravitational redshift difference combined with theoretical cooling curves are 0.39 +/- 0.05 and 0.56 +/- 0.07 M-.. WD 1704+481 is therefore also likely to be the first example of a double degenerate in which the less massive white dwarf is composed of helium and the other white dwarf is composed of carbon and oxygen. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | WHITE-DWARFS ; BINARY ; EVOLUTION |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/314/2/334 |
| 语种 | 英语 |
| WOS记录号 | WOS:000087209900014 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4392]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 作者单位 | 1.University of Southampton, Department of Physics & Astronomy, Highfield, Southampton S017 1BJ 2.Yunnan Observatory, Academia Sinica, Kunming, 650011, China 3.National Astronomical Observatories, The Chinese Academy of Sciences, Beijing 100012, China 4.Institute of Astronomy, Madingley Road, Cambridge CB3 0HA |
| 推荐引用方式 GB/T 7714 | Maxted, PFL,Marsh, TR,Moran, CKJ,et al. The triple degenerate star WD 1704+481[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2000,314(2):334-337. |
| APA | Maxted, PFL,Marsh, TR,Moran, CKJ,&Han ZW.(2000).The triple degenerate star WD 1704+481.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,314(2),334-337. |
| MLA | Maxted, PFL,et al."The triple degenerate star WD 1704+481".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 314.2(2000):334-337. |
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来源：云南天文台
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