YNAO OpenIR  > 大样本恒星演化研究组
The outcomes of carbon-oxygen white dwarfs accreting CO-rich material
Wu CY(吴程远)1,2,3; Wang B(王博)1,2,3; Liu DD(刘栋栋)1,2,3
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2019-02-01
Volume483Issue:1Pages:263-275
DOI10.1093/mnras/sty3176
Contribution Rank第1完成单位
Indexed BySCI
Keywordbinaries: close stars: evolution supernovae: general white dwarfs
Abstract

The double-degenerate model, involving the merger of double carbon-oxygen white dwarfs (COWDs), is one of the two classic models for the progenitors of Type Ia supernovae (SNe Ia). Previous studies suggested that off-centre carbon burning would occur if the mass accretion rate ((M) over dot(acc)) is relatively high during the merging process, leading to the formation of oxygen-neon (ONe) cores that may collapse into neutron stars. However, the off-centre carbon burning is still incompletely understood, especially when the inwardly propagating burning wave reaches the centre. In this paper, we aim to investigate the propagating characteristics of burning waves and the subsequently evolutionary outcomes of these CO cores. We simulated the long-term evolution of CO WDs that accrete CO-rich material by employing the stellar evolution code MESA on the basis of the thick-disc assumption (slow merger). We found that the final outcomes of CO WDs strongly depend on (M) over dot(acc) (M-circle dot yr(-1)) based on the thick-disc assumption, which can be divided into four regions: (1) explosive carbon ignition in the centre, then SNe Ia ((M) over dot(acc) < 2.45 x 10(-6)); (2) OSi cores, then neutron stars (2.45 x 10(-6) less than or similar to (M) over dot(acc) < 4.5 x 10(-6)); (3) ONe cores, then e-capture SNe (4.5 x 10(-6) less than or similar to (M) over dot(acc) < 1.05 x 10(-5)); (4) off-centre oxygen and neon ignition, then off-centre explosion or Si-Fe cores ((M) over dot(acc) greater than or similar to 1.05 x 10(-5)). Our results indicate that the final fates of double CO WD mergers are strongly dependent on the merging processes (e.g. slow merger, fast merger, composite merger, violent merger, etc.).

Funding ProjectNational Natural Science Foundation of China[11873085] ; 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[61561053] ; Chinese Academy of Sciences[KJZD-EW-M06-01] ; Chinese Academy of Sciences[QYZDB-SSW-SYS001] ; Natural Science Foundation of Yunnan Province[2018FB005] ; Natural Science Foundation of Yunnan Province[2017HC018]
Funding OrganizationNational Natural Science Foundation of China[11873085, 11673059, 11521303, 11390374, 61561053] ; Chinese Academy of Sciences[KJZD-EW-M06-01, QYZDB-SSW-SYS001] ; Natural Science Foundation of Yunnan Province[2018FB005, 2017HC018]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
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:000462251000017
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSINGLE-DEGENERATE CHANNEL ; OFF-CENTER IGNITION ; IA SUPERNOVAE ; EVOLUTION ; PROGENITORS ; BINARIES ; MODELS ; PROPAGATION ; COMPANION ; MATTER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/19643
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 AuthorWu CY(吴程远); Wang B(王博)
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.Centre 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
Wu CY,Wang B,Liu DD. The outcomes of carbon-oxygen white dwarfs accreting CO-rich material[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,483(1):263-275.
APA Wu CY,Wang B,&Liu DD.(2019).The outcomes of carbon-oxygen white dwarfs accreting CO-rich material.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,483(1),263-275.
MLA Wu CY,et al."The outcomes of carbon-oxygen white dwarfs accreting CO-rich material".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 483.1(2019):263-275.
Files in This Item:
File Name/Size DocType Version Access License
The outcomes of carb(2101KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wu CY(吴程远)]'s Articles
[Wang B(王博)]'s Articles
[Liu DD(刘栋栋)]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wu CY(吴程远)]'s Articles
[Wang B(王博)]'s Articles
[Liu DD(刘栋栋)]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wu CY(吴程远)]'s Articles
[Wang B(王博)]'s Articles
[Liu DD(刘栋栋)]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: The outcomes of carbon–oxygen white dwarfs accreting CO-rich material.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.