PMO OpenIR  > 星系中的恒星形成研究团组
Stellar populations of classical and pseudo-bulges for a sample of isolated spiral galaxies
Zhao, Yinghe1,2
2012-02-01
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume337Issue:2Pages:719-728
AbstractIn this paper we present the stellar population synthesis results for a sample of 75 bulges in isolated spiral Sb-Sc galaxies, using the spectroscopic data from the Sloan Digital Sky Survey and the STARLIGHT code. We find that both pseudo-bulges and classical bulges in our sample are predominantly composed of old stellar populations, with mean mass-weighted stellar age around 10 Gyr. While the stellar population of pseudo-bulges is, in general, younger than that of classical bulges, the difference is not significant, which indicates that it is hard to distinguish pseudo-bulges from classical bulges, at least for these isolated galaxies, only based on their stellar populations. Pseudo-bulges have star formation activities with relatively longer timescale than classical bulges, indicating that secular evolution is more important in this kind of systems. Our results also show that pseudo-bulges have a lower stellar velocity dispersion than their classical counterparts, which suggests that classical bulges are more dispersion-supported than pseudo-bulges.
KeywordGalaxies Spiral-galaxies Evolution-galaxies Stellar Content-galaxies Bulges
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10509-011-0875-7
WOS KeywordDIGITAL SKY SURVEY ; DYNAMICALLY HOT GALAXIES ; STAR-FORMING GALAXIES ; SEMIEMPIRICAL ANALYSIS ; STRUCTURAL-PROPERTIES ; METALLICITY RELATION ; ELLIPTICAL GALAXIES ; AMIGA PROJECT ; DATA RELEASE ; EVOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000299849400024
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8074
Collection星系中的恒星形成研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Yinghe. Stellar populations of classical and pseudo-bulges for a sample of isolated spiral galaxies[J]. ASTROPHYSICS AND SPACE SCIENCE,2012,337(2):719-728.
APA Zhao, Yinghe.(2012).Stellar populations of classical and pseudo-bulges for a sample of isolated spiral galaxies.ASTROPHYSICS AND SPACE SCIENCE,337(2),719-728.
MLA Zhao, Yinghe."Stellar populations of classical and pseudo-bulges for a sample of isolated spiral galaxies".ASTROPHYSICS AND SPACE SCIENCE 337.2(2012):719-728.
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