| The Difference between the α-disks of Seyfert 1 Galaxiesand Quasars |
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| 作者姓名： | Wei-Hao Bian Hong Dong and Yong-Heng Zhao National Astronomical Observatories Chinese Academy of Sciences Beijing |
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| 作者单位： | Wei-Hao Bian，Hong Dong and Yong-Heng Zhao National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012; Department of Physics，Nanjing Normal University，Nanjing 210097
Department of Physics，Shangqiu Teachers College，Shangqiu 476000 |
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| 基金项目： | Supported by the National Natural Science Foundation of China. |
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| 摘 要： | 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 a 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 a is needed for the Seyfert 1 galaxies than for the PG quasars. This difference in a 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.
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| 关 键 词： | 黑洞 磁倾角 类星体 星系 核子 光学 发光度 赛弗特星系 |
The Difference between the a-disks of Seyfert 1 Galaxies and Quasars |
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| Wei-Hao Bian,Hong Dong and Yong-Heng Zhao National Astronomical Observatories,Chinese Academy of Sciences,Beijing ,.The Difference between the a-disks of Seyfert 1 Galaxies and Quasars[J].Chinese Journal of Astronomy and Astrophysics,2004,4(1):61-66. |
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| Authors: | Wei-HaoBian HongDong Yong-HengZhao |
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| Institution: | [1]NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing100012 [2]DepartmentofPhysics,NanjingNormalUniversity,Nanjing210097 [3]DepartmentofPhysics,ShangqiuTeachersCollege,Shangqiu476000 |
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| Abstract: | In a previous paper, it was suggested that contamination of the nuclear lumiuosity by the host galaxy plays an important role in determining the parameters of the standard a disk of AGNs. Using the nuclear absolute B band magnitud einstead 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 a is needed for the Seyfert 1 galaxies than for the PG quasars. This difference in a 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. |
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| Keywords: | galaxies: active - galaxies: nuclei - quasars: Seyfert |
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