摘要
Observations suggest that γ-ray loud blazars are strongly beamed. The Fermi mission has detected many of blazars, which provide us with a good opportunity to investigate the emission mechanism and the beaming effect in the γ-ray region. We compiled the X-ray observations for 138 Fermi blazars （54 flat spectrum radio quasars, 36 low-peaked BL Lacertae objects, and 48 high-peaked BL Lacertae objects） and calculated their Doppler factors, δγ. It is interesting that the calculated Doppler factors, δγ, are strongly correlated with the γ-ray luminosity.
Observations suggest that γ-ray loud blazars are strongly beamed. The Fermi mission has detected many of blazars, which provide us with a good opportunity to investigate the emission mechanism and the beaming effect in the γ-ray region. We compiled the X-ray observations for 138 Fermi blazars （54 flat spectrum radio quasars, 36 low-peaked BL Lacertae objects, and 48 high-peaked BL Lacertae objects） and calculated their Doppler factors, δγ. It is interesting that the calculated Doppler factors, δγ, are strongly correlated with the γ-ray luminosity.
基金
supported by the National Natural Science Foundation of China (Grant No. 11173009)
the National Basic Research Program of China (973 program, 2007CB815405)
the Bureau of Education of Guangzhou Municipality (No.11 Sui-Jiao-Ke[2009])
Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme(GDUPS) (2009)
Yangcheng Scholar Funded Scheme (10A027S)
the Joint Laboratory for Optical Astronomy of Chinese Academy of Sciences
