| On the formation of single and binary helium-rich subdwarf O stars | |
Justham, S1,2; Podsiadlowski, P2; Han ZW(韩占文)3,4 ; Justham, S (reprint author), Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China.
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| 发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 2011-01 | |
| 卷号 | 410期号:2页码:984-993 |
| DOI | 10.1111/j.1365-2966.2010.17497.x |
| 产权排序 | 第3完成单位 |
| 收录类别 | SCI |
| 关键词 | Binaries: Close Subdwarfs White Dwarfs |
| 摘要 | We propose a formation channel for the previously unexplained helium-rich subdwarf O (He-rich sdO) stars in which post-subdwarf B (sdB) stars (i.e. hybrid CO-He white dwarfs) reignite helium burning in a shell after gaining matter from their helium white dwarf (WD) companions. Such short-period binaries containing post-sdB WDs and helium WDs are predicted by one of the major binary formation channels for sdB stars. In the majority of cases, mass transfer is expected to lead to a dynamically unstable merger event, leaving a single-star remnant. Calculations of the evolution of these stars show that their properties are consistent with the observed He-rich sdO stars. The luminosity of these stars is about an order of magnitude higher than that of canonical sdB stars. We also suggest that binary systems such as PG 1544+488 and HE 0301-3039, which each contain two hot subdwarfs, could be the outcome of a double-core common-envelope phase. Since this favours intermediate-mass progenitors, this may also explain why the subdwarfs in these systems are He-rich. |
| 项目资助者 | PPARC [PPA/G/S/2003/00056] ; China National Postdoc Fund [20090450005] ; National Science Foundation of China [10950110322, 10903001, 10821061] ; Chinese Academy of Sciences [KJCX2-YW-T24] ; National Science Foundation [NSF PHY05-51164] |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0035-8711 |
| URL | 查看原文 |
| WOS记录号 | WOS:000285766000020 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | IA PROGENITOR SURVEY ; DWARF COOLING CURVE ; WHITE-DWARFS ; SDB STARS ; B-STARS ; ATMOSPHERIC PARAMETERS ; ELLIPTIC GALAXIES ; HOT SUBDWARFS ; MILLISECOND PULSAR ; GLOBULAR-CLUSTERS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4518 |
| 专题 | 大样本恒星演化研究组 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Justham, S (reprint author), Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China. |
| 作者单位 | 1.The Kavli Institute for Astronomy & Astrophysics, Peking University, Beijing 100871, China 2.Sub-department of Astrophysics, Oxford University, Keble Road, Oxford OX1 3RH 3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 4.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Justham, S,Podsiadlowski, P,Han ZW,et al. On the formation of single and binary helium-rich subdwarf O stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,410(2):984-993. |
| APA | Justham, S,Podsiadlowski, P,Han ZW,&Justham, S .(2011).On the formation of single and binary helium-rich subdwarf O stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,410(2),984-993. |
| MLA | Justham, S,et al."On the formation of single and binary helium-rich subdwarf O stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 410.2(2011):984-993. |
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| On the formation of （3773KB） | 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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