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《中国天文和天体物理学报(英文版)》 2003-05
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Discovery of Five Narrow-Line Seyfert 1 Galaxies and Im- plications on the NLS1 Model

Jiang-Hua Wu, Xiang-Tao He, Yang Chen and Wolfgang Voges 1 National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012; jhwu 2 Department of Astronomy, Beijing Normal University, Beijing 100875 3 Max-Planck-Institut fur Extraterrestrische Physik, D-85740 Garching, Germany  
We report the discovery of five Narrow-Line Seyfert 1 galaxies (NLSls) identified from the ROSAT All-Sky Survey bright sources. One of them has a quasar-like 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.
【CateGory Index】: P145.8
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