Influence of alpha-enhancement on effective temperatures of hot subdwarfs

doi:10.1007/s10509-010-0291-4

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	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 ; Guo, JP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊	ASTROPHYSICS AND SPACE SCIENCE
	2010-10
卷号	329 期号:1-2 页码:15-18
DOI	10.1007/s10509-010-0291-4
产权排序	第1完成单位
收录类别	SCI
关键词	Stars: Abundances Stars: Subdwarfs Stars: Horizontal-branch
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.
项目资助者	National Natural Science Foundation of China [10773026, 10821061, 2007CB815406] ; Chinese Academy of Sciences [KJCX2-YW-T24] ; Yunnan Natural Science Foundation [06GJ061001]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-640X
URL	查看原文
WOS记录号	WOS:000282823200004
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	STELLAR EVOLUTION ; ELLIPTIC GALAXIES ; GLOBULAR-CLUSTERS ; MODELS ; STARS ; OPACITIES ; ISOCHRONES ; INDEXES ; SYSTEMS ; CARBON
引用统计
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/4486
专题	大样本恒星演化研究组中国科学院天体结构与演化重点实验室
通讯作者	Guo, JP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
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
第一作者单位	中国科学院云南天文台
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,&Guo, JP .(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.

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