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The WD plus He star binaries as the progenitors of type Ia supernovae
Wang B(王博)1,2; Liu DD(刘栋栋)1,2
Source PublicationOPEN ASTRONOMY
2017-04-01
Volume26Issue:1Pages:160-163
DOI10.1515/astro-2017-0018
Contribution Rank第1完成单位
Indexed BySCI
KeywordWhite Dwarfs Binaries: Close Stars: Evolution
Abstract

Employing the MESA stellar evolution code, we computed He accretion onto carbon-oxygen white dwarfs (CO WDs). We found two possible outcomes for models in which the WD steadily grows in mass towards the Chandrasekhar limit. For relatively low He-accretion rates carbon ignition occurs in the center, leading to a type Ia supernova (SN Ia) explosion, whereas for relatively high accretion rates carbon is ignited off-center, probably leading to collapse. Thus the parameter space producing SNe Ia is reduced compared to what was assumed in earlier papers, in which the possibility of off-center ignition was ignored. We then applied these results in binary population synthesis modelling, finding a modest reduction in the expected birthrate of SNe Ia resulting from the WD+He star channel.

Funding ProjectNational Natural Science Foundation of China[11390374]
Funding OrganizationNational Natural Science Foundation of China[11390374]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherDE GRUYTER POLAND SP ZOO
Publication PlaceBOGUMILA ZUGA 32A STR., 01-811 WARSAW, POLAND
ISSN2543-6376
URL查看原文
WOS IDWOS:000427930200008
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordWHITE-DWARFS ; EVOLUTION ; IGNITION
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12297
Collection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
Corresponding AuthorWang B(王博)
Affiliation1.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, CAS, Kunming 650216, China
2.Center for Astronomical Mega-Science, CAS, Beijing 100012, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang B,Liu DD. The WD plus He star binaries as the progenitors of type Ia supernovae[J]. OPEN ASTRONOMY,2017,26(1):160-163.
APA Wang B,&Liu DD.(2017).The WD plus He star binaries as the progenitors of type Ia supernovae.OPEN ASTRONOMY,26(1),160-163.
MLA Wang B,et al."The WD plus He star binaries as the progenitors of type Ia supernovae".OPEN ASTRONOMY 26.1(2017):160-163.
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