YNAO OpenIR  > 大样本恒星演化研究组
Hydrogen and helium shell burning during white dwarf accretion
Cui X(崔晓)1,2,3; Meng XC(孟祥存)1,2; Han ZW(韩占文)1,2
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
2018-05-01
Volume18Issue:5
DOI10.1088/1674-4527/18/5/58
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Evolution Supernovae: General White Dwarfs
Abstract

Type la supernovae (SNe la) are believed to be thermonuclear explosions of carbon oxygen (CO) white dwarfs (WDs) with masses dose to the Chandrasekhar mass limit. How a CO WD accretes matter and grows in mass to this limit is not well understood, hindering our understanding of SN la explosions and the reliability of using SNe la as a cosmological distance indicator. In this work, we employed the stellar' evolution code MESA to simulate the accretion process of hydrogen-rich material onto a 1.0 M-circle dot CO WD at a high rate (over the Eddington limit) of 4.3 x 10(-7) M-circle dot yr(-1). The simulation demonstrates the characteristics of the double shell burning on top of the WD, with a hydrogen shell burning on top of a helium burning shell. The results show that helium shell burning is not steady (i.e. it flashes). Clashes from the helium shell are weaker than those in the case of accretion of helium-rich material onto a CO WD. The carbon to oxygen mass ratio resulting from the helium shell burning is higher than what was previously thought. Interestingly, the CO WD growing due to accretion has an outer part containing a small fraction of helium in addition to carbon and oxygen. The flashes become weaker and weaker as the accretion continues.

Funding ProjectNational Natural Science Foundation of China[11521303] ; National Natural Science Foundation of China[11733008] ; National Natural Science Foundation of China[11390374] ; National Natural Science Foundation of China[11473063] ; National Natural Science Foundation of China[11522327] ; National Natural Science Foundation of China[11703081] ; Natural Science Foundation of Yunnan Province[2013HA005] ; Natural Science Foundation of Yunnan Province[2017HC018] ; Natural Science Foundation of Yunnan Province[2015HB096] ; CAS Light of West China Program ; Chinese Academy of Sciences[KJZD-EW-M06-01]
Funding OrganizationNational Natural Science Foundation of China[11521303, 11733008, 11390374, 11473063, 11522327, 11703081] ; Natural Science Foundation of Yunnan Province[2013HA005, 2017HC018, 2015HB096] ; CAS Light of West China Program ; Chinese Academy of Sciences[KJZD-EW-M06-01]
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherNATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Publication Place20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS IDWOS:000432273900010
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordMASS ACCUMULATION EFFICIENCY ; SINGLE-DEGENERATE CHANNEL ; IA SUPERNOVAE ; PROGENITORS ; EVOLUTION ; STARS ; MODEL ; BINARIES ; FLASHES ; GIANT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12392
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 AuthorCui X(崔晓)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, 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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Cui X,Meng XC,Han ZW. Hydrogen and helium shell burning during white dwarf accretion[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(5).
APA Cui X,Meng XC,&Han ZW.(2018).Hydrogen and helium shell burning during white dwarf accretion.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(5).
MLA Cui X,et al."Hydrogen and helium shell burning during white dwarf accretion".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.5(2018).
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