YNAO OpenIR  > 大样本恒星演化研究组
The single degenerate channel for the progenitors of Type Ia supernovae
Meng XC(孟祥存)1,2; Chen XF(陈雪飞)1; Han ZW(韩占文)1
会议录名称IAU Symposium Proceedings Series - ART OF MODELLING STARS IN THE 21ST CENTURY
2008
卷号4
期号252
页码379-382
DOI10.1017/S1743921308023259
会议录编者/会议主办者Deng, L; Chan, KL
产权排序第1完成单位
收录类别CPCI
会议名称252nd Symposium of the International-Astronomical-Union
会议日期2008-04-06
会议地点Sanya, PEOPLES R CHINA
会议赞助商Int Astron Union; Natl Nat Sci Fdn China; Chinese Acad Sci; Natl Astron Observatories
关键词Binaries: Close Stars: Evolution Supernovae: General White Dwarf: Metallicity
摘要

We have carried Out a detailed study of the single-degenerate channel for the progenitors of type Ia supernovae (SNe Ia). In the model, a carbon-oxygen white dwarf (CO WD) accretes hydrogen-rich material from an unevolved or a slightly evolved non-degenerate companion to increase its mass to Chandrasekhar mass limit. Incorporating the prescription of Hachisu et al. (1999a) for the accretion efficiency into Eggleton's stellar evolution code and assuming that the prescription is valid for all metallicities, we performed binary stellar evolution calculations for more than 25,000 close WD binary systems with various metallicities. The initial parameter spaces for SNe Ia are presented in an orbital period-secondary mass (log P(i), M(2)(i)) plane for each Z. Adopting the results above, we studied the birth rate of SNe Ia for various Z via binary population synthesis. From the study, we see that for a high Z, SNe Ia occur systemically earlier and the peak value of the birth rate is larger if a single starburst is assumed. The Galactic birth rate from the channel is lower than (but comparable to) that inferred from observations. We also showed the distributions of the parameters of the binary systems at the moment of supernova explosion and the distributions of the properties of companions after supernova explosion. The former provides physics input to simulate the interaction between supernova ejecta and its companion, and the latter is helpful for searching the companions in supernova remnants.

项目资助者N/A
语种英语
学科领域天文学 ; 天体物理学 ; 恒星与银河系
学科门类理学 ; 理学::天文学
文章类型Proceedings Paper
出版者CAMBRIDGE UNIV PRESS
出版地THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
ISBN号978-0-521-88983-4
ISSN号1743-9213
URL查看原文
归档日期2008-11-07
WOS记录号WOS:000263138600072
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Stellar Evolution ; Low-mass ; Stars ; Models ; Opacities ; Companion ; Systems
引用统计
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/240
专题大样本恒星演化研究组
通讯作者Meng XC(孟祥存)
作者单位1.National Astronomical Observatories/Yunnan Observatory, the Chinese Academy of Sciences, Kunming, 650011, China
2.Graduate School of the Chinese Academy of Sciences
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Meng XC,Chen XF,Han ZW. The single degenerate channel for the progenitors of Type Ia supernovae[C]//Deng, L; Chan, KL. THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND:CAMBRIDGE UNIV PRESS,2008:379-382.
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