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Super-Eddington wind scenario for the progenitors of type Ia supernovae: Accreting He-rich matter onto white dwarfs
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; Wang, B (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650216, Peoples R China.
发表期刊ASTRONOMY & ASTROPHYSICS
2015-12
卷号584期号:37
DOI10.1051/0004-6361/201526569
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收录类别SCI
关键词Stars: Evolution Binaries: Close Supernovae: General White Dwarfs
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.
项目资助者National Basic Research Program of China (973 programme)(2014CB845700) ; National Natural Science Foundation of China(11390374,11521303,11322327,U1331117) ; Chinese Academy of Sciences(KJZD-EW-M06-01,XDB09010202) ; Natural Science Foundation of Yunnan Province(2013HB097,2013FB083)
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
URL查看原文
归档日期2015-12-02
WOS记录号WOS:000366936800037
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]STELLAR ASTROPHYSICS MESA ; AM CVN STARS ; DELAY TIMES ; HELIUM NOVA ; POPULATION SYNTHESIS ; MASS LIMIT ; EVOLUTION ; BINARY ; MODEL ; SHELL
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9393
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Wang, B (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650216, Peoples R China.
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
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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.,...&Wang, B .(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).
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