Super-Eddington wind scenario for the progenitors of type Ia supernovae: Accreting He-rich matter onto white dwarfs
文献类型：期刊论文
| 作者 | Wang B(王博)1,2 ; Li Y(李焱)1,2; Ma X(马鑫)1,2; Liu DD(刘栋栋)1,2; Cui X(崔晓)1,2; Han ZW(韩占文)1,2
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2015-12 |
| 卷号 | 584期号:37 |
| ISSN号 | 1432-0746 |
| 关键词 | stars: evolution binaries: close supernovae: general white dwarfs |
| 通讯作者 | Wang, B (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650216, Peoples R China. |
| 产权排序 | 第一完成单位 |
| 英文摘要 | Context. Supernovae of type Ia (SNe Ia) are believed to be thermonuclear explosions of carbon-oxygen white dwarfs (CO WDs). However, the mass accretion process onto CO WDs is still not completely understood. Aims. In this paper, we study the accretion of He-rich matter onto CO WDs and explore a scenario in which a strong wind forms on the surface of the WD if the total luminosity exceeds the Eddington limit. Methods. Using a stellar evolution code called modules for experiments in stellar astrophysics (MESA), we simulated the He accretion process onto CO WDs for WDs with masses of 0.6-1.35 M-circle dot and various accretion rates of 10(-8)-10(-5) M-circle dot yr(-1). Results. If the contribution of the total luminosity is included when determining the Eddington accretion rate, then a super-Eddington wind could be triggered at relatively lower accretion rates than those of previous studies based on steady-state models. The super-Eddington wind can prevent the WDs with high accretion rates from evolving into red-giant-like He stars. We found that the contributions from thermal energy of the WD are non-negligible, judging by our simulations, even though the nuclear burning energy is the dominating source of luminosity. We also provide the limits of the steady He-burning regime in which the WDs do not lose any accreted matter and increase their mass steadily, and calculated the mass retention efficiency during He layer flashes for various WD masses and accretion rates. These obtained results can be used in future binary population synthesis computations. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STELLAR ASTROPHYSICS MESA ; AM CVN STARS ; DELAY TIMES ; HELIUM NOVA ; POPULATION SYNTHESIS ; MASS LIMIT ; EVOLUTION ; BINARY ; MODEL ; SHELL |
| 收录类别 | SCI |
| 原文出处 | http://www.aanda.org/articles/aa/abs/2015/12/aa26569-15/aa26569-15.html |
| 语种 | 英语 |
| WOS记录号 | WOS:000366936800037 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9393]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, PR China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, PR China |
| 推荐引用方式 GB/T 7714 | Wang B,Li Y,Ma X,et al. Super-Eddington wind scenario for the progenitors of type Ia supernovae: Accreting He-rich matter onto white dwarfs[J]. ASTRONOMY & ASTROPHYSICS,2015,584(37). |
| APA | Wang B,Li Y,Ma X,Liu DD,Cui X,&Han ZW.(2015).Super-Eddington wind scenario for the progenitors of type Ia supernovae: Accreting He-rich matter onto white dwarfs.ASTRONOMY & ASTROPHYSICS,584(37). |
| MLA | Wang B,et al."Super-Eddington wind scenario for the progenitors of type Ia supernovae: Accreting He-rich matter onto white dwarfs".ASTRONOMY & ASTROPHYSICS 584.37(2015). |
入库方式： OAI收割
来源：云南天文台
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