An isochrone data base and a rapid model for stellar population synthesis

doi:10.1111/j.1365-2966.2008.12793.x

YNAO OpenIR > 大样本恒星演化研究组

	An isochrone data base and a rapid model for stellar population synthesis
	Li ZM(李忠木)1,2 ; Han ZW(韩占文)1 ; Li, ZM (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2008-06-11
卷号	387 期号:1 页码:105-114
DOI	10.1111/j.1365-2966.2008.12793.x
产权排序	第1完成单位
收录类别	SCI
关键词	Galaxies : Stellar Content Galaxies : Elliptical And Lenticular Cd
摘要	We first presented an isochrone data base that can be widely used for stellar population synthesis studies and colour-magnitude diagram (CMD) fitting. The data base consists of the isochrones of both single-star and binary-star simple stellar populations (ss-SSPs and bs-SSPs). The ranges for the age and metallicity of populations are 0-15 Gyr and 0.0001-0.03, respectively. All data are available for populations with two widely used initial mass functions (IMFs), that is, Salpeter IMF and Chabrier IMF. The uncertainty caused by the data base (about 0.81 per cent) is designed to be smaller than those caused by the Hurley code and widely used stellar spectra libraries (e.g. BaSeL 3.1) when it is used for stellar population synthesis. Based on the isochrone data base, we then built a rapid stellar population synthesis (RPS) model and calculated the high-resolution (0.3-angstrom) integrated spectral energy distributions, Lick indices and colour indices for bs-SSPs and ss-SSPs. In particular, we calculated the UBVRIJHKLM colours, ugriz colours and some composite colours that consist of magnitudes on different systems. These colours are useful for disentangling the well-known stellar age-metallicity degeneracy according to our previous work. As an example for applying the isochrone data base for CMD fitting, we fitted the CMDs of two star clusters (M67 and NGC 1868) and obtained their distance moduli, colour excesses, stellar metallicities and ages. The results showed that the isochrones of bs-SSPs are closer to those of real star clusters. It suggests that we should take the effects of binary interactions into account in stellar population synthesis. We also discussed on the limitations of the application of the isochrone data base and the results of the RPS model.
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0035-8711
URL	查看原文
归档日期	2008-08-06
WOS记录号	WOS:000256378700010
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	HIGH-SPECTRAL-RESOLUTION ; MASS-RATIO DISTRIBUTION ; EARLY-TYPE GALAXIES ; ELLIPTIC GALAXIES ; SPECTROSCOPIC BINARIES ; EVOLUTIONARY SYNTHESIS ; OPEN CLUSTERS ; METALLICITY ; LIBRARY ; CALIBRATION
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/4454
专题	大样本恒星演化研究组
通讯作者	Li, ZM (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, The Chinese Academy of Sciences, Kunming 650011, China 2.Graduate University of the Chinese Academy of Sciences, Beijing 100049, 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	Li ZM,Han ZW,Li, ZM . An isochrone data base and a rapid model for stellar population synthesis[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2008,387(1):105-114.
APA	Li ZM,Han ZW,&Li, ZM .(2008).An isochrone data base and a rapid model for stellar population synthesis.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,387(1),105-114.
MLA	Li ZM,et al."An isochrone data base and a rapid model for stellar population synthesis".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 387.1(2008):105-114.

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