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The double-degenerate model for the progenitors of Type Ia supernovae
Liu DD(刘栋栋)1,2,3; Wang B(王博)1,2,3; Han ZW(韩占文)1,2,3
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2018-02-01
Volume473Issue:4Pages:5352-5361
DOI10.1093/mnras/stx2756
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Stars: Evolution Supernovae: General White Dwarfs
Abstract

The double-degenerate (DD) model, involving the merging of massive double carbon-oxygen white dwarfs (CO WDs) driven by gravitational wave radiation, is one of the classical pathways for the formation of Type Ia supernovae (SNe Ia). Recently, it has been proposed that the WD+He subgiant channel has a significant contribution to the production of massive double WDs, in which the primary WD accumulates mass by accreting He-rich matter from an He subgiant. We evolved about 1800 CO WD+He star systems and obtained a large and dense grid for producing SNe Ia through the DD model. We then performed a series of binary population synthesis simulations for the DD model, in which the WD+He subgiant channel is calculated by interpolations in the SN Ia production grid. According to our standard model, the Galactic birth rate of SNe Ia is about 2.4 x 10(-3) yr(-1) for the WD+He subgiant channel of the DD model; the total birth rate is about 3.7 x 10(-3) yr(-1) for all channels, reproducing that of observations. Previous theoretical models still have deficit with the observed SNe Ia with delay times <1Gyr and >8Gyr. After considering the WD+He subgiant channel, we found that the delay time distributions are comparable with the observed results. Additionally, some recent studies proposed that the violent WD mergers are more likely to produce SNe Ia based on the DD model. We estimated that the violent mergers through the DD model may contribute to at most 16 per cent of all SNe Ia.

Funding ProjectNational Basic Research Program of China (973 programme)[2014CB845700] ; Natural Science Foundation of China[11673059] ; Natural Science Foundation of China[11521303] ; Natural Science Foundation of China[11573016] ; Natural Science Foundation of China[11390374] ; Chinese Academy of Sciences[KJZD-EW-M06-01] ; Chinese Academy of Sciences[QYZDB-SSW-SYS001] ; Yunnan Province[2013HA005] ; Yunnan Province[2013HB097] ; Yunnan Province[2017HC018]
Funding OrganizationNational Basic Research Program of China (973 programme)[2014CB845700] ; Natural Science Foundation of China[11673059, 11521303, 11573016, 11390374] ; Chinese Academy of Sciences[KJZD-EW-M06-01, QYZDB-SSW-SYS001] ; Yunnan Province[2013HA005, 2013HB097, 2017HC018]
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
WOS IDWOS:000424117300077
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordWHITE-DWARF BINARIES ; DELAY-TIME DISTRIBUTION ; ASYMPTOTIC-GIANT-BRANCH ; X-RAY SOURCES ; EXPLOSION MODELS ; KPD 1930+2752 ; INITIAL MASS ; HELIUM NOVA ; POPULATION SYNTHESIS ; MERGER REMNANTS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12115
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.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, CAS, Kunming 650216, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.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
Liu DD,Wang B,Han ZW. The double-degenerate model for the progenitors of Type Ia supernovae[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,473(4):5352-5361.
APA Liu DD,Wang B,&Han ZW.(2018).The double-degenerate model for the progenitors of Type Ia supernovae.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,473(4),5352-5361.
MLA Liu DD,et al."The double-degenerate model for the progenitors of Type Ia supernovae".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 473.4(2018):5352-5361.
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