Inclusion of binaries in evolutionary population synthesis

	Inclusion of binaries in evolutionary population synthesis
	Zhang FH(张奉辉)1 ; Han ZW(韩占文)1 ; Li LF(李立芳)1 ; Hurley, JR 2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2005-03-01
卷号	357 期号:3 页码:1088-1103
关键词	binaries : general stars : evolution galaxies : clusters : general
ISSN号	0035-8711
通讯作者	Zhang, FH (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan Province, Peoples R China.
产权排序	第一完成单位
英文摘要	Using evolutionary population synthesis we present integrated colours, integrated spectral energy distributions and absorption-line indices defined by the Lick Observatory image dissector scanner (referred to as the Lick/IDS) system, for an extensive set of instantaneous-burst binary stellar populations with and without binary interactions. The ages of the populations are in the range 1-15 Gyr and the metallicities are in the range 0.0001-0.03. By comparing the results for populations with and without binary interactions we show that the inclusion of binary interactions makes the integrated U-B, B-V, V-R and R-I colours and all Lick/IDS spectral absorption indices (except for H) substantially smaller. In other words, binary evolution makes a population appear bluer. This effect raises the derived age and metallicity of the population. We calculate several sets of additional solar-metallicity binary stellar populations to explore the influence of the binary evolution algorithm input parameters (the common-envelope ejection efficiency and the stellar wind mass-loss rate) on the resulting integrated colours. We also look at the dependence on the choice of distribution functions used to generate the initial binary population. The results show that variations in the choice of input model parameters and distributions can significantly affect the results. However, comparing the discrepancies that exist between the colours of various models, we find that the differences are less than those produced between the models with and those without binary interactions. Therefore it is very necessary to consider binary interactions in order to draw accurate conclusions from evolutionary population synthesis work.
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]	SINGLE STELLAR POPULATIONS ; ABSORPTION-FEATURE INDEXES ; MASS-RATIO DISTRIBUTION ; SUBDWARF-B-STARS ; SOLAR NEIGHBORHOOD ; SPECTROSCOPIC BINARIES ; ELLIPTIC GALAXIES ; METALLICITY ; MODELS ; ORIGIN
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/357/3/1088
语种	英语
WOS记录号	WOS:000227086400028
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4417]
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 Observatory, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province, 650011, China 2.Centre for Stellar and Planetary Astrophysics, School of Mathematical Sciences, Monash University, VIC 3800, Australia
推荐引用方式 GB/T 7714	Zhang FH,Han ZW,Li LF,et al. Inclusion of binaries in evolutionary population synthesis[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2005,357(3):1088-1103.
APA	Zhang FH,Han ZW,Li LF,&Hurley, JR.(2005).Inclusion of binaries in evolutionary population synthesis.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,357(3),1088-1103.
MLA	Zhang FH,et al."Inclusion of binaries in evolutionary population synthesis".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 357.3(2005):1088-1103.