Evolved cataclysmic variables as progenitors of AM CVn stars
文献类型：期刊论文
| 作者 | Sarkar, Arnab3; Ge HW(葛宏伟)1,2,3 ; Tout, Christopher A3
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2023-02-07 |
| 卷号 | 520期号:2页码:3187-3200 |
| ISSN号 | 0035-8711 |
| 关键词 | binaries close - stars magnetic field-stars mass-loss - novae cataclysmic variables - stars rotation - white dwarfs |
| DOI | 10.1093/mnras/stad354 |
| 产权排序 | 第2完成单位 |
| 文献子类 | Article |
| 英文摘要 | We model cataclysmic variables (CVs) with solar metallicity donors ( X = 0.7 andZ = 0.02) that evolve to form AM CVn stars through the evolved CV formation channel using various angular momentum loss mechanisms by magnetic braking (AMLMB). We find that the time-scale for AML(MB) in our double-dynamo (DD) model is shorter than that of previously used empirical formulae. Owing to the shorter time-scales, a larger parameter space of initial conditions evolves to form AM CVn stars with the DD model than with other models. We perform an analysis of the expected number of AM CVn stars formed through the Evolved CV channel and find about 3 times as many AM CVn stars as reported before. We evolve these systems in detail with the Cambridge stellar evolution code ( STARS ) and show that evolved CVs populate a region with orbital period P-orb >= 5 . 5 hr . We evolve our donors beyond their orbital period minimum and find that a significant number become extremely H-exhausted systems. This makes them indistinguishable from systems evolved from the He-star and the White Dwarf (WD) channels in terms of the absence of H in their spectra. We also compare the masses, mass-transfer rates of the donor, and the orbital period with observations. We find that the state of the donor and the absence of H in systems such as YZ LMi and V396 Hya match with our modelled trajectories, while systems such as CR Boo and HP Lib match with our modelled tracks if their actual donor mass lies on the lower-end of the observed mass range. |
| 学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
| URL标识 | 查看原文 |
| 出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
| WOS关键词 | CLOSE BINARY-SYSTEMS ; STELLAR EVOLUTION ; X-RAY ; SPECTROSCOPY ; POPULATION ; GAIA14AAE ; EMISSION ; DWARFS ; MODELS ; DONORS |
| 资助项目 | Gates Cambridge Trust ; NSFC[12173081] ; key research programme of frontier sciences, CAS[ZDBS-LY-7005] ; Yunnan Fundamental Research Projects[202101AV070001] ; Churchill College |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000943150500025 |
| 资助机构 | Gates Cambridge Trust ; NSFC[12173081] ; key research programme of frontier sciences, CAS[ZDBS-LY-7005] ; Yunnan Fundamental Research Projects[202101AV070001] ; Churchill College |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/25876]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 通讯作者 | Sarkar, Arnab; Ge HW(葛宏伟); Tout, Christopher A |
| 作者单位 | 1.University of Chinese Academy of Sciences, Beijing 100049, China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 3.Institute of Astronomy, The Observatories, Madingley Road, Cambridge CB3 OHA, UK; |
| 推荐引用方式 GB/T 7714 | Sarkar, Arnab,Ge HW,Tout, Christopher A. Evolved cataclysmic variables as progenitors of AM CVn stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,520(2):3187-3200. |
| APA | Sarkar, Arnab,Ge HW,&Tout, Christopher A.(2023).Evolved cataclysmic variables as progenitors of AM CVn stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,520(2),3187-3200. |
| MLA | Sarkar, Arnab,et al."Evolved cataclysmic variables as progenitors of AM CVn stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 520.2(2023):3187-3200. |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。