The Different Nature of Seyfert 2 Galaxies With and Without Hidden Broad-line Regions

@article{Wu2011TheDN,
  title={The Different Nature of Seyfert 2 Galaxies With and Without Hidden Broad-line Regions},
  author={Yu-Zhong Wu and En-peng Zhang and Yan-chun Liang and Cheng-min Zhang and Yongheng Zhao},
  journal={The Astrophysical Journal},
  year={2011},
  volume={730},
  pages={121}
}
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 whether HBLR Sy2s are dominated by active galactic nuclei (AGNs) and whether 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 [Ne V] λ14.32/[Ne II] λ12.81 and [O IV] λ25.89/[Ne II] λ12.81 line ratios… 

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