Blue stragglers in galactic open clusters and the simple stellar population models

	Blue stragglers in galactic open clusters and the simple stellar population models
	Xin Y(新宇)1,2 ; Deng, LC 2; Han ZW(韩占文)1
	2007-08
会议名称	IAU Symposium #241 - Stellar Populations as Building Blocks of Galaxies
关键词	blue stragglers open clusters and associations: general Galaxy: stellar content
卷号	241
页码	203-204
英文摘要	The presence of blue straggler stars (BSs) as secure members of Galactic open clusters (OCs) poses a major challenge to the conventional picture of evolutionary population synthesis (EPS) based on the stellar evolution theory of single stars, since the major formation ways of BSs are all correlated with stellar interactions. With a working sample including 100 Galactic OCs with age ranging from 0.1 to 10 Gyr, the contributions of BSs to the integrated light of their host clusters are calculated on an individual cluster base. We also show in this work that the intrinsic evolutionary stages of OCs can be enormously misunderstood by the conventional simple stellar population (SSP) models, if the real/observed integrated spectral energy distributions (ISEDs) of OCs are the only thing that we can depend on and are fitted with ISEDs of conventional SSPs, and consequently the huge uncertainties in age and/or metallicity can be conservatively estimated at 50%. Thus, we strongly confirm that when the conventional EPS technique is used to study the properties of stellar populations in complicated systems such as galaxies, the contributions of BSs should be definitely taken into account in order to avoid big fitting mistake.
收录类别	其他
产权排序	第一完成单位
会议网址	http://adsabs.harvard.edu/abs/2007IAUS..241..203X
会议录	Proceedings of IAU Symposium #241 - Stellar Populations as Building Blocks of Galaxies
会议录出版者	Cambridge University Press
会议录出版地	Cambridge
学科主题	天文学
语种	英语
内容类型	会议论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/231]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.National Astronomical Observatories/Yunnan, CAS, Kunming, 650011, China 2.National Astronomical Observatories/Beijing, CAS, Beijing, 100012, China
推荐引用方式 GB/T 7714	Xin Y,Deng, LC,Han ZW. Blue stragglers in galactic open clusters and the simple stellar population models[C]. 见:IAU Symposium #241 - Stellar Populations as Building Blocks of Galaxies.http://adsabs.harvard.edu/abs/2007IAUS..241..203X.