Gaseous versus stellar velocity dispersion in emission-line galaxies
文献类型：期刊论文
| 作者 | Chen, Xiao-Yan1,2; Hao, Cai-Na1,3; Wang, Jing |
| 刊名 | Chinese journal of astronomy and astrophysics
 |
| 出版日期 | 2008 |
| 卷号 | 8期号:1页码:25-38 |
| 关键词 | Galaxies : active Galaxies : interactions Galaxies : star-forming Galaxies : seyfert |
| ISSN号 | 1009-9271 |
| 通讯作者 | Chen, xiao-yan(chenxy@bao.ac.cn) |
| 英文摘要 | We compare the ionized gas velocity dispersion sigma(gas) with the stellar velocity dispersion sigma(*) 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 sigma(gas) from the fwhms of emission lines (h alpha, [nii]lambda lambda 6548, 6583 and [sii]lambda lambda 6716, 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 velocity 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 (sigma) over bar gas/sigma* as a function of the redshift and the axial ratio to test the effects of aperture and galaxy inclination, and found that both effects are weak. finally we checked the trend of (sigma) over bar gas/sigma* with the infrared luminosity and found no significant correlation. |
| WOS关键词 | DIGITAL-SKY-SURVEY ; STAR-FORMING GALAXIES ; ACTIVE GALACTIC NUCLEI ; LUMINOUS INFRARED GALAXIES ; BLACK-HOLE MASS ; NARROW-LINE ; DATA RELEASE ; SEYFERT-1 GALAXIES ; DYNAMICAL MASSES ; OPTICAL-SPECTRA |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000253671300003 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2390275 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Chen, Xiao-Yan |
| 作者单位 | 1.Tianjin Normal Univ, Tianjin Astrophys Ctr, Tianjin 300384, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England |
| 推荐引用方式 GB/T 7714 | Chen, Xiao-Yan,Hao, Cai-Na,Wang, Jing. Gaseous versus stellar velocity dispersion in emission-line galaxies[J]. Chinese journal of astronomy and astrophysics,2008,8(1):25-38. |
| APA | Chen, Xiao-Yan,Hao, Cai-Na,&Wang, Jing.(2008).Gaseous versus stellar velocity dispersion in emission-line galaxies.Chinese journal of astronomy and astrophysics,8(1),25-38. |
| MLA | Chen, Xiao-Yan,et al."Gaseous versus stellar velocity dispersion in emission-line galaxies".Chinese journal of astronomy and astrophysics 8.1(2008):25-38. |
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来源：中国科学院大学
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