| Discovery of Five Narrow－Line Seyfert 1 Galaxies and Implications on the NLS1 Model |
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| 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) |
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| 摘 要： |
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| 关 键 词： | 黑洞 活性 X射线 赛弗特星系 Seyfert星系 NLS1模型 |
Discovery of Five Narrow-Line Seyfert 1 Galaxies and Implications on the NLS1 Model |
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| Authors: | Jiang-Hua Wu Xiang-Tao He Yang Chen Wolfgang Voges |
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| Abstract: | 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 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 ls. |
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| Keywords: | black hole physics - galaxy: active - galaxy: Seyfert - X-ray: galaxy |
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