The single degenerate channel for the progenitors of Type Ia supernovae

	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); Chen XF(陈雪飞); Han ZW(韩占文); Meng XC(孟祥存)
	2008
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
关键词	Binaries: close stars: evolution supernovae: general white dwarf: metallicity
卷号	4
期号	252
页码	379-382
通讯作者	Meng, XC (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
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.
收录类别	CPCI
产权排序	第一完成单位
会议网址	http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=2452044&fileId=S1743921308023259
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
学科主题	Astronomy & Astrophysics
语种	英语
ISSN号	1743-9213
ISBN号	978-0-521-88983-4
内容类型	会议论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/240]
专题	云南天文台_大样本恒星演化研究组
通讯作者	Meng XC(孟祥存)
推荐引用方式 GB/T 7714	Meng XC,Chen XF,Han ZW,et al. The single degenerate channel for the progenitors of Type Ia supernovae[C]. 见:252nd Symposium of the International-Astronomical-Union. Sanya, PEOPLES R CHINA. 2008-04-06.http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=2452044&fileId=S1743921308023259.