Discovery of Five Narrow-Line Seyfert 1 Galaxies and Implications on the NLS1 Model
We report the discovery of five Narrow-Line Seyfert 1 galaxies (NLS1s)identified from the ROSAT All-Sky Survey bright sources. One of them has a quasarlike luminosity and two, including the quasar-like one, have close companions and/or show interacting features. We calculate the central black hole masses and Eddington ratios for the five NLSls. In combination with the objects of Kaspi et al., we find that NLSls have smaller central black hole masses and higher accretion rate than normal Seyfert 1s.
作 者： Jiang-Hua Wu Xiang-Tao He Yang Chen Wolfgang Voges 作者单位： Jiang-Hua Wu(National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012)Xiang-Tao He,Yang Chen(Department of Astronomy, Beijing Normal University, Beijing 100875)
Wolfgang Voges(Max-Planck-Institut fur Extraterrestrische Physik, D-85740 Garching, Germany)
刊 名： 天体物理学报(英文版) ISTIC SCI 英文刊名： CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 年，卷(期)： 2003 3(5) 分类号： P14 关键词： black hole physics - galaxy: active - galaxy: Seyfert - X-ray: galaxy