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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
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
Volume2Issue:5Pages:408-418
AbstractWe 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.
KeywordGalaxies : Active Galaxies : Seyfert Polarization Star Formation
Indexed BySCI
Language英语
WOS IDWOS:000178799000004
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8541
Collection光学天文研究部
AffiliationChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
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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