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Comparisons of infrared colors and emission-line intensities between two types of Seyfert 2 galaxies
Cheng, LP; Zhao, YH; Wei, JY
2002-10-01
发表期刊CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
卷号2期号:5页码:408-418
摘要We study the relation between the infrared colors, [OIII] emission lines, gaseous absorbing column density (N-H),and the detectability of the polarized (hidden) broad-line region (HBLR) in a large sample of 75 Seyfert 2 galaxies (Sy2s). From the indicators of star-formation activity, f(60)/f(100) and L-FIR/L-B, we find some evidence that the Sy2s without HBLR show higher star-formation activities than those with HBLR, in agreement with previous prediction. Also, we confirm that the HBLR Sy2s tend to have a larger luminosity ratio of the core to the host galaxy, suggesting that the HBLR Sy2s display more powerful AGN activity. However, the level of obscuration found in previous papers is nearly indistinguishable between the two types of Sy2s. The results support the statement that the non-HBLR Sy2s, with a weaker core component and a stronger star-formation activity component, are intrinsically different from the HBLR Sy2s, which are Sy1 systems with a hidden powerful AGN core and a low star-formation activity. The indications are that the non-HBLR Sy2s might be at an earlier evolutionary phase than the HBLR Sy2s.
关键词Galaxies : Active Galaxies : Seyfert Polarization Star Formation
收录类别SCI
语种英语
WOS记录号WOS:000178799000004
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8541
专题光学天文研究部
作者单位Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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GB/T 7714
Cheng, LP,Zhao, YH,Wei, JY. Comparisons of infrared colors and emission-line intensities between two types of Seyfert 2 galaxies[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2002,2(5):408-418.
APA Cheng, LP,Zhao, YH,&Wei, JY.(2002).Comparisons of infrared colors and emission-line intensities between two types of Seyfert 2 galaxies.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2(5),408-418.
MLA Cheng, LP,et al."Comparisons of infrared colors and emission-line intensities between two types of Seyfert 2 galaxies".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 2.5(2002):408-418.
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