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题名:
The single degenerate channel for the progenitors of Type Ia supernovae
作者: Meng XC(孟祥存); Chen XF(陈雪飞); Han ZW(韩占文)
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
会议录: IAU Symposium Proceedings Series - ART OF MODELLING STARS IN THE 21ST CENTURY
会议录出版者: CAMBRIDGE UNIV PRESS
会议录出版地: THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
出版日期: 2008
卷号: 4
期号: 252
页码: 379-382
学科分类: Astronomy & Astrophysics
产权排序: 第1完成单位
收录类别: CPCI
通讯作者: Meng, XC (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
关键词: Binaries: close ; stars: evolution ; supernovae: general ; white dwarf: metallicity
英文摘要: 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.
语种: 英语
相关网址: 查看原文
ISBN号: 978-0-521-88983-4
ISSN号: 1743-9213
归档日期: 2008-11-07
内容类型: 会议论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/240
Appears in Collections:大样本恒星演化研究组_会议论文

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