THE STELLAR POPULATION AND STAR FORMATION PROPERTIES OF BLUE COMPACT DWARF GALAXIES

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 星系中的恒星形成研究团组

	THE STELLAR POPULATION AND STAR FORMATION PROPERTIES OF BLUE COMPACT DWARF GALAXIES
	Zhao, Yinghe1,2 ; Gu, Qiusheng 2,3; Gao, Yu1
刊名	ASTRONOMICAL JOURNAL
	2011-02-01
卷号	141 期号:2 页码:68(14pp)
关键词	galaxies: dwarf galaxies: starburst galaxies: stellar content
ISSN号	0004-6256
英文摘要	We study stellar populations, star formation histories (SFIIs), and star formation properties for a sample of blue compact dwarf galaxies (BCDs) selected by cross-correlating the Gil de Paz et al. sample with the Sloan Digital Sky Survey Data Release 6. The sample includes 31 BCDs, which span a large range of galactic parameters. Using a stellar population synthesis method, we derive stellar populations and reconstruct SFHs for these BCDs. Our studies confirm that BCDs are not young systems experiencing their first star formation, but old systems undergoing a starburst activity. The stellar mass-weighted ages can be up to 10 Gyr, while the luminosity-weighted ages might be up to approximately three orders of magnitude younger (similar to 10 Myr) for most galaxies. Based on multiwavelength data, we also study the integrated star formation properties. The star formation rate (SFR) for our sample galaxies spans nearly three orders of magnitude, from a few 10(-3) to similar to 1M(circle dot) yr(-1), with a median value of similar to 0.1M(circle dot) yr(-1). We find that about 90% of BCDs in our sample have their birthrate parameter (the ratio of the current SFR to the averaged past SFR) b > 2-3. We further discuss correlations of the current SFR with the integrated galactic stellar mass and explore the connection between SFR and metallicity.
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]	EMISSION-LINE GALAXIES ; HUBBLE-SPACE-TELESCOPE ; DIGITAL SKY SURVEY ; LUMINOSITY-METALLICITY RELATIONS ; FORMING GALAXIES ; FORMATION HISTORY ; UNIVERSIDAD-COMPLUTENSE ; STARBURST GALAXIES ; MADRID LIST ; SEMIEMPIRICAL ANALYSIS
收录类别	SCI
语种	英语
WOS记录号	WOS:000286186100040
公开日期	2012-08-07
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/4526]
专题	紫金山天文台_星系中的恒星形成研究团组
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China 3.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Yinghe,Gu, Qiusheng,Gao, Yu. THE STELLAR POPULATION AND STAR FORMATION PROPERTIES OF BLUE COMPACT DWARF GALAXIES[J]. ASTRONOMICAL JOURNAL,2011,141(2):68(14pp).
APA	Zhao, Yinghe,Gu, Qiusheng,&Gao, Yu.(2011).THE STELLAR POPULATION AND STAR FORMATION PROPERTIES OF BLUE COMPACT DWARF GALAXIES.ASTRONOMICAL JOURNAL,141(2),68(14pp).
MLA	Zhao, Yinghe,et al."THE STELLAR POPULATION AND STAR FORMATION PROPERTIES OF BLUE COMPACT DWARF GALAXIES".ASTRONOMICAL JOURNAL 141.2(2011):68(14pp).