Properties of the Narrow Line Seyfert 1 Galaxies Revisited | |
Su, R.1,3![]() ![]() ![]() ![]() | |
刊名 | International Journal of Astronomy and Astrophysics
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2016-06-01 | |
卷号 | 6期号:2页码:166-174 |
关键词 | Quasars: Emission Lines Quasars: General Radio Continuum: Galaxies X-rays: Galaxies |
ISSN号 | 2161-4717 |
DOI | 10.4236/ijaa.2016.62014 |
产权排序 | 1 |
英文摘要 | There is growing evidence to suggest that the black hole mass has been previously underestimated with the H$\beta$ line width for certain active galactic nuclei (AGN). With the assumption of the flatter rather than isotropic velocity distribution of gases in the broad-line region of AGN, we investigated the properties of narrow line Seyfert 1 (NLS1) galaxies, like the black hole mass and the Eddington ratio, and compared with broad line Seyfert 1 (BLS1) galaxies. Since gamma-rays detected in a few NLS1s which favor a smaller viewing angle in NLS1s than BLS1s, with the projection effect we estimated the relative black hole mass and Eddington ratio for NLS1s and BLS1s. The result implies that the NLS1s and BLS1s have similar black hole masses and Eddington ratios, peaked at a larger black hole mass and lower Eddington ratio for the NLS1s than thought before. Furthermore, with applying the correction factor 6 of average black hole mass as derived from the modelling of both optical and UV data in radio-loud NLS1s by Calderone et al., to the Xu et al. sample, we find that the NLS1s and BLS1s also show similar black hole masses and Eddington ratios, peaked at $2.0\times10^{7}M_{\odot}$ and 0.12 (Eddington ratio) for the NLS1s. The $M_{BH}-\sigma$ relation due to the enhanced black hole masses of NLS1s is discussed. In addition, there seems to show a linear correlation between jet power and disk luminosity for the flat spectrum radio-loud NLS1 sample, which implies an accretion dominated rather than black hole spin dominated jet. |
项目编号 | 2015CB857100 ; 11273050 |
语种 | 英语 |
资助机构 | 973 Program ; the Key Laboratory of Radio Astronomy, Chinese Academy of Sciences ; National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.xao.ac.cn/handle/45760611-7/1495] ![]() |
专题 | 星系宇宙学研究团组 新疆天文台_射电天文研究室 新疆天文台_110米口径全可动射电望远镜(SmART)_110米大口径全可动射电望远镜关键技术研究(973项目)_课题1:大样本射电天体的观测和前沿问题研究 |
通讯作者 | Liu, X. |
作者单位 | 1.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, China 2.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Urumqi, China 3.Graduate University of Chinese Academy of Sciences, Beijing, China |
推荐引用方式 GB/T 7714 | Su, R.,Liu, X.,Yang, P.,et al. Properties of the Narrow Line Seyfert 1 Galaxies Revisited[J]. International Journal of Astronomy and Astrophysics,2016,6(2):166-174. |
APA | Su, R.,Liu, X.,Yang, P.,&Zhang, Z..(2016).Properties of the Narrow Line Seyfert 1 Galaxies Revisited.International Journal of Astronomy and Astrophysics,6(2),166-174. |
MLA | Su, R.,et al."Properties of the Narrow Line Seyfert 1 Galaxies Revisited".International Journal of Astronomy and Astrophysics 6.2(2016):166-174. |
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