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THE STELLAR POPULATION AND STAR FORMATION PROPERTIES OF BLUE COMPACT DWARF GALAXIES
Zhao, Yinghe1,2; Gu, Qiusheng2,3; Gao, Yu1
2011-02-01
Source PublicationASTRONOMICAL JOURNAL
ISSN0004-6256
Volume141Issue:2Pages:68(14pp)
AbstractWe 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.
KeywordGalaxies: Dwarf Galaxies: Starburst Galaxies: Stellar Content
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-6256/141/2/68
WOS KeywordEMISSION-LINE GALAXIES ; HUBBLE-SPACE-TELESCOPE ; DIGITAL SKY SURVEY ; LUMINOSITY-METALLICITY RELATIONS ; FORMING GALAXIES ; FORMATION HISTORY ; UNIVERSIDAD-COMPLUTENSE ; STARBURST GALAXIES ; MADRID LIST ; SEMIEMPIRICAL ANALYSIS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000286186100040
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4526
Collection星系中的恒星形成研究团组
Affiliation1.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
Recommended Citation
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).
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