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He-accreting carbon-oxygen white dwarfs and Type Ia supernovae
Wang B(王博)1,2; Podsiadlowski, Philipp3; Han ZW(韩占文)1,2
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2017-12-01
Volume472Issue:2Pages:1593-1599
DOI10.1093/mnras/stx2192
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Stars: Evolution Supernovae: General White Dwarfs
Abstract

He accretion on to carbon-oxygen white dwarfs (CO WDs) plays a fundamental role when studying the formation of Type Ia supernovae (SNe Ia). Employing the mesa stellar evolution code, we calculated the long-term evolution of He-accreting CO WDs. Previous studies usually supposed that a WD can grow in mass to the Chandrasekhar limit in the stable He burning region and finally produce an SN Ia. However, in this study, we find that off-centre carbon ignition occurs in the stable He burning region if the accretion rate is above a critical value (similar to 2.05 x 10(-6) M-circle dot yr(-1)), resulting in accretion-induced collapse rather than an SN Ia. If the accretion rate is below the critical value, explosive carbon ignition will eventually happen in the centre producing an SN Ia. Taking into account the possibility of off-centre carbon ignition, we have re-determined the initial parameter space that produces SNe Ia in the He star donor channel, one of the promising channels to produce SNe Ia in young populations. Since this parameter space is smaller than was found in the previous study of Wang et al. (2009), the SN Ia rates are also correspondingly smaller. We also determined the chemical abundance profile of the He-accreting WDs at the moment of explosive carbon ignition, which can be used as initial input for SN Ia explosion models.

Funding ProjectNSFC[11673059] ; NSFC[11390374] ; NSFC[11521303] ; Yunnan Province[2013HA005] ; Yunnan Province[2013HB097] ; CAS[QYZDB-SSW-SYS001] ; CAS[KJZD-EW-M06-01]
Funding OrganizationNSFC[11673059, 11390374, 11521303] ; Yunnan Province[2013HA005, 2013HB097] ; CAS[QYZDB-SSW-SYS001, KJZD-EW-M06-01]
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
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
Archive Date2017-09-25
WOS IDWOS:000413082900026
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordX-RAY SOURCES ; DEGENERATE DWARF ; BURNING SHELLS ; KPD 1930+2752 ; LIGHT CURVES ; DELAY TIMES ; HELIUM NOVA ; PROGENITORS ; EVOLUTION ; STAR
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11903
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
3.Department of Astronomy, Oxford University, Oxford OX1 3RH, UK
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang B,Podsiadlowski, Philipp,Han ZW. He-accreting carbon-oxygen white dwarfs and Type Ia supernovae[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,472(2):1593-1599.
APA Wang B,Podsiadlowski, Philipp,&Han ZW.(2017).He-accreting carbon-oxygen white dwarfs and Type Ia supernovae.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,472(2),1593-1599.
MLA Wang B,et al."He-accreting carbon-oxygen white dwarfs and Type Ia supernovae".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 472.2(2017):1593-1599.
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