Gaseous versus Stellar Velocity Dispersion in Emission-Line Galaxies
文献类型：期刊论文
| 作者 | XiaoYan Chen1; CaiNa Hao1; Jing Wang2 |
| 刊名 | Chinese Astronomy and Astrophysics
 |
| 出版日期 | 2008 |
| 卷号 | 8期号:1页码:25 |
| 关键词 | galaxies active - galaxies interactions - galaxies star-forming - galaxies:Seyfert |
| ISSN号 | 0275-1062 |
| 英文摘要 | We compare the ionized gas velocity dispersion σgas with the stellar velocity dis-persion σ* in star-forming galaxies, composite galaxies, Low Ionization Nuclear Emission-line Regions (LINERs) and Seyfert 2s, compiled from a cross-identification of Sloan Digital Sky Survey Fourth Data Release (SDSS DR4) and Point Source Catalogue Redshift Survey (PSCz). We measure σgas from the FWHMs of emission lines (Hα, NIIλλ6548, 6583 and SII λλ6716, 6731). A significant correlation between the gas and stellar velocity dispersion exists, despite substantial scatter. The mean value of the gas to stellar velocity dispersion ratio is close to unity. This suggests that gas velocity dispersion can substitute for the stellar veloc-ity dispersion as a tracer of the gravitational potential well for all the four types of galaxies,but the involved uncertainties are different from type to type. We also studied σgas/σ* as a function of the redshift and the axial ratio to test the effects of aperture and galaxy inclina-tion, and found that both effects are weak. Finally we checked the trend of σgas/σ* with the infrared luminosity and found no significant correlation. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/63620]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.天津师范大学 2.中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | XiaoYan Chen,CaiNa Hao,Jing Wang. Gaseous versus Stellar Velocity Dispersion in Emission-Line Galaxies[J]. Chinese Astronomy and Astrophysics,2008,8(1):25. |
| APA | XiaoYan Chen,CaiNa Hao,&Jing Wang.(2008).Gaseous versus Stellar Velocity Dispersion in Emission-Line Galaxies.Chinese Astronomy and Astrophysics,8(1),25. |
| MLA | XiaoYan Chen,et al."Gaseous versus Stellar Velocity Dispersion in Emission-Line Galaxies".Chinese Astronomy and Astrophysics 8.1(2008):25. |
入库方式： OAI收割
来源：国家天文台
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