The estimations of four basic parameters for gamma-ray loud blazars  

作　　者：Jun-Hui Fan Yu-Hai Yuan Yi Liu Jing-Yi Zhang Yi-Ping Qin Hua Liu Yong Huang Jiang-He Yang Hong-Guang Wang Jiang-Shui Zhang 

机构地区：[1]Center for Astrophysics, Guangzhou University, Guangzhou 510400, China [2]Department of Physics and Electronics Science, Hunan University of Arts and Science, Changde 415000, China

出　　处：《Chinese Journal of Astronomy and Astrophysics》2009年第5期538-546,共9页中国天文和天体物理学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China.(Nos. 10573005 and 10633010) ;the 973 project (No. 2007CB815405)

摘　　要：The method used in our previous papers is adopted to estimate four basic parameters （the central black hole mass （M）, the boosting factor （or Doppler factor） （6）, the propagation angle （Φ） and the distance along the axis to the site of the γ-ray production （d）） for 59 γ-ray loud blazars （20 BL Lacertae objects and 39 flat spectrum radio quasars）. The central black hole masses estimated for this sample are in a range of from 107 Me to 109 MG. In the case of black hole mass, there is no clear difference between BL Lacertae objects and flat spectrum radio quasars, which is consistent with the previous results suggesting that the central black hole masses do not play an important role in the evolutionary sequence of blazars.The method used in our previous papers is adopted to estimate four basic parameters （the central black hole mass （M）, the boosting factor （or Doppler factor） （6）, the propagation angle （Φ） and the distance along the axis to the site of the γ-ray production （d）） for 59 γ-ray loud blazars （20 BL Lacertae objects and 39 flat spectrum radio quasars）. The central black hole masses estimated for this sample are in a range of from 107 Me to 109 MG. In the case of black hole mass, there is no clear difference between BL Lacertae objects and flat spectrum radio quasars, which is consistent with the previous results suggesting that the central black hole masses do not play an important role in the evolutionary sequence of blazars.

关 键 词：GALAXIES quasars -- galaxies BL Lacertae objects -- galaxies jet -- galaxies NUCLEI 

分 类 号：P157.7[天文地球—天文学] P172.3