Binary population synthesis for blue stragglers

	Binary population synthesis for blue stragglers
	Chen XF(陈雪飞)1,2 ; Han ZW(韩占文)1,2
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2010-10
卷号	329 期号:1-2 页码:277-282
关键词	Binaries: close Star: evolution Blue stragglers
ISSN号	0004-640X
通讯作者	Chen, X (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	In this talk, we will simply show the consequences of binary population synthesis for blue stragglers, such as the integrated spectral energy distribution (ISED), the color-magnitude diagram, the specific frequency, and the influences on colors. Blue stragglers have been found in all stellar populations and they are an important population component in both stellar evolution and star clusters. Much evidence shows that blue stragglers are relevant to primordial binaries. The binary population synthesis study shows that primordial binary evolution may produce blue stragglers at any given times. The specific frequency in this way decreases with time first, then increases when the age is larger than 10 Gyr, while that from angular momentum loss induced by magnetic braking in low-mass binaries increases with time and exceeds that of primordial binary evolution in a population older than 3 Gyr. Meanwhile, blue stragglers resulting from primordial binary evolution are dominant contributors to the ISEDs in ultraviolet and blue bands in a population between 0.3 and 2.0 Gyr. The mass fraction of the lost matter from the primary accreted by the secondary, beta, significantly affects on the final results, e.g. the specific frequency of blue stragglers decreasing with beta, blue stragglers produced from a high value of beta being more massive, then contributing more to the ISEDs of the host clusters. For old open clusters, it is appropriate to adopt a higher value of beta when the primary is in HG at the onset of mass transfer. Our study also shows that, for most Galactic open clusters, the specific frequency of blue stragglers obtained from our simulations is much lower than that of observations, which has been discussed in this talk.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	STELLAR COLLISION PRODUCTS ; SUBDWARF-B-STARS ; OPEN CLUSTERS ; EVOLUTIONARY SYNTHESIS ; GLOBULAR-CLUSTERS ; CONTACT BINARIES ; CLOSE BINARIES ; MASS-TRANSFER ; SYSTEMS ; MERGERS
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007%2Fs10509-010-0368-0
语种	英语
WOS记录号	WOS:000282823200045
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4491]
专题	云南天文台_大样本恒星演化研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, China
推荐引用方式 GB/T 7714	Chen XF,Han ZW. Binary population synthesis for blue stragglers[J]. ASTROPHYSICS AND SPACE SCIENCE,2010,329(1-2):277-282.
APA	Chen XF,&Han ZW.(2010).Binary population synthesis for blue stragglers.ASTROPHYSICS AND SPACE SCIENCE,329(1-2),277-282.
MLA	Chen XF,et al."Binary population synthesis for blue stragglers".ASTROPHYSICS AND SPACE SCIENCE 329.1-2(2010):277-282.