The central black hole masses of Gamma-ray loud blazars

Details The central black hole masses of Gamma-ray loud blazars The central black hole masses of Gamma-ray loud blazars

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587..291f&link_type=abstract

GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 291-295 (2001).

Astronomy and Astrophysics

Astrophysics

Active And Peculiar Galaxies And Related Systems, Galactic Nuclei, Circumnuclear Matter, And Bulges, Gamma-Ray Sources, Gamma-Ray Bursts, Masses And Mass Distribution, Black Holes

Scientific paper

In 1999, Cheng, Fan, Zheng proposed a method to determin the parameters: the central black hole mass, M, the Doppler factor, δ, the propagation angle of the γ-rays with respect to the symmetric axis of a two-temperature accretion disk, Φ, and the distance (i.e. the height above the accretion disk), d at which the γ-rays are created. In that method, available variability timescales in gamma-ray bands, the absorption effect of a γ-ray and the beaming effect have been taken into account. In this paper, we adopte this method to a larger sample. Our results indicate that, if we take the intrinsic γ-ray luminosity to be λ times the Eddington luminosity, Lγin=λLEdd., the masses of the blazars are in the range of (1.5~83)×107Mbeye (λ=1.0) or (2.2~131)×107Mbeye (λ=0.1), the Doppler factors (δ) lie in the range of 0.17 to 3.72 (λ=1.0) or 0.25 to 5.33 (λ=0.1), the angle (φ) is in the range of 10° to 68° (λ=1.0) or 10° to 63° (λ=0.1), and the distance (d) is in the range of 20.5Rg to 750Rg (λ=1.0) or 18Rg to 680Rg (λ=0.1). .

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