publication . Preprint . 2011

The Different Nature in Seyfert 2 Galaxies With and Without Hidden Broad-Line Regions

Wu, Yu-Zhong; Zhang, En-Peng; Liang, Yan-Chun; Zhang, Cheng-Min; Zhao, Yong-Heng;
Open Access English
  • Published: 21 Jan 2011
Abstract
We compile a large sample of 120 Seyfert 2 galaxies (Sy2s) which contains 49 hidden broad-line region (HBLR) Sy2s and 71 non-HBLR Sy2s. From the difference in the power sources between two groups, we test if HBLR Sy2s are dominated by active galactic nuclei (AGNs), and if non-HBLR Sy2s are dominated by starbursts. We show that: (1) HBLR Sy2s have larger accretion rates than non-HBLR Sy2s; (2) HBLR Sy2s have larger \Nev $\lambda 14.32$/\Neii $\lambda 12.81$ and \oiv $\lambda 25.89$/\Neii $\lambda 12.81$ line ratios than non-HBLR Sy2s; (3) HBLR Sy2s have smaller $IRAS$ $f_{60}/f_{25}$ flux ratio which shows the relative strength of the host galaxy and nuclear emis...
Subjects
free text keywords: Astrophysics - High Energy Astrophysical Phenomena
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