Influence of alpha-enhancement on effective temperatures of hot subdwarfs

	Influence of alpha-enhancement on effective temperatures of hot subdwarfs
	Guo JP(郭建坡)1,2,3 ; Zhang FH(张奉辉)1,2 ; Zhang XF(张先飞)1,2,3 ; Han ZW(韩占文)1,2
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2010-10
卷号	329 期号:1-2 页码:15-18
关键词	Stars: abundances Stars: subdwarfs Stars: horizontal-branch
ISSN号	0004-640X
通讯作者	Guo, JP (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	Observations of metal elements in some halo or bulge globular clusters and in some elliptical galaxies have shown the alpha-enhancement phenomenon. Hot subdwarfs are important stars, e.g., they are important sources of far-ultraviolet light in the Galaxy and have successfully been used to explain the UV-upturn in elliptical galaxies. Therefore, we try to study the impacts of alpha-enhancement on hot subdwarfs. In our calculation, the value of the metallicity is 0.02, all the core masses of hot subdwarfs are 0.475 M (aS (TM)), and the envelope masses of the hot subdwarfs are 0.001, 0.005 and 0.016 M (aS (TM)), respectively. We find that the influences of alpha-enhancement on luminosity and evolutionary age of hot subdwarfs are not visible. But alpha-enhancement can make the effective temperatures of hot subdwarfs become higher, and the thicker their envelopes are, the more obvious this influence is.
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 EVOLUTION ; ELLIPTIC GALAXIES ; GLOBULAR-CLUSTERS ; MODELS ; STARS ; OPACITIES ; ISOCHRONES ; INDEXES ; SYSTEMS ; CARBON
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007%2Fs10509-010-0291-4
语种	英语
WOS记录号	WOS:000282823200004
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4486]
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, P.R. China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, P.R. China 3.Graduate School of the Chinese Academy of Sciences, Beijing, 100049, P.R. China
推荐引用方式 GB/T 7714	Guo JP,Zhang FH,Zhang XF,et al. Influence of alpha-enhancement on effective temperatures of hot subdwarfs[J]. ASTROPHYSICS AND SPACE SCIENCE,2010,329(1-2):15-18.
APA	Guo JP,Zhang FH,Zhang XF,&Han ZW.(2010).Influence of alpha-enhancement on effective temperatures of hot subdwarfs.ASTROPHYSICS AND SPACE SCIENCE,329(1-2),15-18.
MLA	Guo JP,et al."Influence of alpha-enhancement on effective temperatures of hot subdwarfs".ASTROPHYSICS AND SPACE SCIENCE 329.1-2(2010):15-18.