Stellar populations of classical and pseudo-bulges for a sample of isolated spiral galaxies | |
Zhao, Yinghe1,2![]() | |
刊名 | ASTROPHYSICS AND SPACE SCIENCE
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2012-02-01 | |
卷号 | 337期号:2页码:719-728 |
关键词 | Galaxies Spiral-galaxies Evolution-galaxies Stellar content-galaxies Bulges |
ISSN号 | 0004-640X |
英文摘要 | In 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. |
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] | DIGITAL SKY SURVEY ; DYNAMICALLY HOT GALAXIES ; STAR-FORMING GALAXIES ; SEMIEMPIRICAL ANALYSIS ; STRUCTURAL-PROPERTIES ; METALLICITY RELATION ; ELLIPTICAL GALAXIES ; AMIGA PROJECT ; DATA RELEASE ; EVOLUTION |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000299849400024 |
公开日期 | 2013-01-31 |
内容类型 | 期刊论文 |
源URL | [http://libir.pmo.ac.cn/handle/332002/8074] ![]() |
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, Jiangsu, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China |
推荐引用方式 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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