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

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

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004chjaa...4...61b&link_type=abstract

Chinese Journal of Astronomy & Astrophysics, Vol. 4, p. 61-66.

Astronomy and Astrophysics

Astrophysics

1

Galaxies: Active, Galaxies: Nuclei, Quasars: Seyfert

Scientific paper

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.

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