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Merging of a CO WD and a He-rich WD to produce a type Ia supernovae
Liu DD(刘栋栋)1,2,3,4; Wang B(王博)1,2,3,4; Wu CY(吴程远)1,2,3,4; Han ZW(韩占文)1,2,3,4
Source PublicationASTRONOMY & ASTROPHYSICS
2017-10-25
Volume606
DOI10.1051/0004-6361/201629788
Contribution Rank第1完成单位
Indexed BySCI ; EI
KeywordBinaries: Close Stars: Evolution Supernovae: General
Abstract

Context. Although type Ia supernovae (SNe Ia) play a key role in astrophysics, the companions of the exploding carbon-oxygen white dwarfs (CO WDs) are still not completely identified. It has been suggested recently that a He-rich WD (a He WD or a hybrid HeCO WD) that merges with a CO WD may produce an SN Ia. This theory was based on the double-detonation model, in which the shock compression in the CO core caused by the surface explosion of the He-rich shell might lead to the explosion of the whole CO WD. However, so far, very few binary population synthesis (BPS) studies have been made on the merger scenario of a CO WD and a He-rich WD in the context of SNe Ia. 

Aims. We aim to systematically study the Galactic birthrates and delay-time distributions of SNe Ia based on the merger scenario of a CO WD and a He-rich WD. 

Methods. We performed a series of Monte Carlo BPS simulations to investigate the properties of SNe Ia from the merging of a COWD and a He-rich WD based on the Hurley rapid binary evolution code. We also considered the influence of different metallicities on the final results. 

Results. From our simulations, we found that no more than 15% of all SNe Ia stem from the merger scenario of a CO WD and a He-rich WD, and their delay times range from similar to 110 Myr to the Hubble time. This scenario mainly contributes to SN Ia explosions with intermediate and long delay times. The present work indicates that the merger scenario of a CO WD and a He-rich WD can roughly reproduce the birthrates of SN 1991bg-like events, and cover the range of their delay times. We also found that SN Ia birthrates from this scenario would be higher for the cases with low metallicities.

Funding ProjectNational Basic Research Program of China (973 programme)[2014CB845700] ; National Natural Science Foundation of China[11673059] ; National Natural Science Foundation of China[11521303] ; National Natural Science Foundation of China[11390374] ; National Natural Science Foundation of China[11573016] ; Chinese Academy of Sciences[KJZD-EW-M06-01] ; Key Research Program of Frontier Science CAS[QYZDB-SSW-SYS001] ; Youth Innovation Promotion Association CAS ; Natural Science Foundation of Yunnan Province[2013HB097] ; Natural Science Foundation of Yunnan Province[2013HA005]
Funding OrganizationNational Basic Research Program of China (973 programme)[2014CB845700] ; National Natural Science Foundation of China[11673059, 11521303, 11390374, 11573016] ; Chinese Academy of Sciences[KJZD-EW-M06-01] ; Key Research Program of Frontier Science CAS[QYZDB-SSW-SYS001] ; Youth Innovation Promotion Association CAS ; Natural Science Foundation of Yunnan Province[2013HB097, 2013HA005]
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
PublisherEDP SCIENCES S A
Publication Place17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN0004-6361
URL查看原文
WOS IDWOS:000413939700004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCOMMON ENVELOPE EVOLUTION ; DOUBLE WHITE-DWARFS ; DELAY-TIME DISTRIBUTION ; BINDING-ENERGY PARAMETER ; CLOSE BINARY EVOLUTION ; SUBDWARF-B-STARS ; X-RAY SOURCES ; INITIAL MASS ; STELLAR EVOLUTION ; EXPLOSION MODELS
EI Accession Number20174404342924
EI KeywordsSupernovae
EI Classification Number657.2Extraterrestrial Physics and Stellar Phenomena - 922.2Mathematical Statistics
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/10183
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 AuthorLiu DD(刘栋栋)
Affiliation1.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, Kunming, 650216, China
3.University of Chinese Academy of Sciences, Beijing, 100049, China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 100012, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu DD,Wang B,Wu CY,et al. Merging of a CO WD and a He-rich WD to produce a type Ia supernovae[J]. ASTRONOMY & ASTROPHYSICS,2017,606.
APA Liu DD,Wang B,Wu CY,&Han ZW.(2017).Merging of a CO WD and a He-rich WD to produce a type Ia supernovae.ASTRONOMY & ASTROPHYSICS,606.
MLA Liu DD,et al."Merging of a CO WD and a He-rich WD to produce a type Ia supernovae".ASTRONOMY & ASTROPHYSICS 606(2017).
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