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28 March 2024
 
  » arxiv » astro-ph/9910358

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The central black hole masses and Doppler factors of the $gamma$-ray loud blazars
J.H. Fan ; G.Z. Xie ; R. Bacon ;
Date 20 Oct 1999
Subject astro-ph
AffiliationCfA,GNU), G.Z. Xie (YAO,CAS), R. Bacon (CRAL
AbstractIn this paper, The central black hole masses and the Doppler factors are derived for PKS 0528+134, PKS 0537-441, 3C279, PKS 1406-074, PKS 1622-297, Q1633+382, Mkn 501, and BL Lacertae. The masses obtained are in the range of (1 -7)$ imes 10^{7}M_{odot}$ and compared with that obtained with the Klein-Nishina cross section considered (Dermer & Gehrels 1995). If we considered only the Thomson cross section, the masses are in the range of 2.6$ imes 10^{6}M_{odot}$ - 2$ imes 10^{11}M_{odot}$. The masses obtained from our method are less sensitive to the flux than those obtained from Dermer & Gehrels (1995) method. The masses obtained from two flares (1991 and 1996 flares) of 3C279 are almost the same. For 3C279 and BL Lacertae, viewing angle, $ heta$, and Lorentz factor, $Gamma$, are estimated from the derived Doppler factor and the measured superluminal velocity. For 3C279, $ heta = 10^{circ}.9-15^{circ}.6$, $Gamma$ = 2.4-14.4 for $delta$ = 3.37; $ heta = 8^{circ}.45-9^{circ}.7$, $Gamma$ = 2.95-11.20 for $delta$ = 4.89; For BL Lacertae, $ heta = 25^{circ}-29^{circ}.4$, $Gamma$ = 2.0-4.0.
Source arXiv, astro-ph/9910358
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