The Difference between the α-disks of Seyfert 1 Galaxies and Quasars

In a previous paper, it was suggested that contamination of the nuclear luminosity by the host galaxy plays an important role in determining the parameters of the standard α disk of AGNs. Using the nuclear absolute B band magnitude instead of the total absolute B band magnitude, we have recalculated the central black hole masses, accretion rates and disk inclinations for 20 Seyfert 1 galaxies and 17 Palomar-Green (PG) quasars. It is found that a small value of α is needed for the Seyfert 1 galaxies than for the PG quasars. This difference in α possibly leads to the different properties of Seyfert 1 galaxies and quasars. Furthermore, we find most of the objects in this sample are not accreting at super-Eddington rates if we adopt the nuclear optical luminosity in our calculation.

作 者： Wei-Hao Bian Hong Dong Yong-Heng Zhao   作者單位： Wei-Hao Bian(National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012;Department of Physics, Nanjing Normal University, Nanjing 210097)

Hong Dong(Department of Physics, Shangqiu Teachers College, Shangqiu 476000)

Yong-Heng Zhao(National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012) 

刊 名： 天體物理學報(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS  年，卷(期)： 2004 4(1)  分類號： P1  關鍵詞： galaxies: active- galaxies: nuclei- quasars: Seyfert  

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