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The single degenerate channel for the progenitors of Type Ia supernovae
Meng XC(孟祥存); Chen XF(陈雪飞); Han ZW(韩占文); Meng, XC (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
2008
会议名称252nd Symposium of the International-Astronomical-Union
会议录名称IAU Symposium Proceedings Series - ART OF MODELLING STARS IN THE 21ST CENTURY
卷号4
期号252
页码379-382
会议日期2008-04-06
会议地点Sanya, PEOPLES R CHINA
出版地THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
出版者CAMBRIDGE UNIV PRESS
产权排序第1完成单位
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.
关键词Binaries: Close Stars: Evolution Supernovae: General White Dwarf: Metallicity
学科领域Astronomy & Astrophysics
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ISBN号978-0-521-88983-4
收录类别CPCI
ISSN号1743-9213
语种英语
归档日期2008-11-07
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 (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
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Meng XC,Chen XF,Han ZW,et al. The single degenerate channel for the progenitors of Type Ia supernovae[C]. THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND:CAMBRIDGE UNIV PRESS,2008:379-382.
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