The formation of subdwarf B stars

	The formation of subdwarf B stars
	Han ZW(韩占文); Podsiadlowski, P; Maxted, PFL; Marsh, TR; Ivanova, N; Han ZW(韩占文)
	2002
会议名称	187 Colloquium on Exotic Stars as Challenges to Evolution
会议日期	2002-03-04
会议地点	MIAMI, FL
卷号	279
页码	285-290
通讯作者	Han, ZW (reprint author), CAS, NAOC, Yunnan Observ, Kunming 650011, Peoples R China.
英文摘要	We performed full binary evolution calculations and carried out binary population synthesis studies in order to investigate the formation of subdwarf B (sdB) stars via, the channels of stable Roche lobe overflow (RLOF), common envelope ejection and helium white dwarf mergers. Our model is successful in the explanation of observational properties of sdB stars, e.g. we explained the orbital period - minimum companion mass (log P - M-comp) diagram, the effective temperature - surface gravity (T-eff - log g) diagram, the orbital period distribution, the log(gtheta(4)) (theta = 5040/T-eff) distribution, the mass function distribution, the binary. fraction of sdB stars, the fraction of sdB binaries with WD companions, the birth rates, the space number densities, etc. We conclude that (a) the first RLOF needs to be more stabilized than commonly assumed, (b) the first stable RLOF is not conservative, (c) common envelope ejection is very efficient.
收录类别	CPCI
产权排序	第一完成单位
会议网址	http://adsabs.harvard.edu/abs/2002ASPC..279..285H
会议录	ASTRONOMICAL SOCIETY OF THE PACIFIC (ASP) CONFERENCE SERIES - EXOTIC STARS AS CHALLENGES TO EVOLUTION, PROCEEDINGS
会议录出版者	ASTRONOMICAL SOC PACIFIC
会议录出版地	390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
学科主题	Astronomy & Astrophysics
语种	英语
ISBN号	1-58381-122-2
内容类型	会议论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/221]
专题	云南天文台_大样本恒星演化研究组
推荐引用方式 GB/T 7714	Han ZW,Podsiadlowski, P,Maxted, PFL,et al. The formation of subdwarf B stars[C]. 见:187 Colloquium on Exotic Stars as Challenges to Evolution. MIAMI, FL. 2002-03-04.http://adsabs.harvard.edu/abs/2002ASPC..279..285H.