Multiwavelength Doppler factors for Fermi-detected gamma-ray loud blazars

作者：Zeng Hou Dun^*; Zhang Li

来源：Research in Astronomy and Astrophysics, 2011, 11(4): 391-400.

• galaxies: active
• galaxies: nuclei
• galaxies: jets
• radiation mechanisms: non-thermal

We collect a sample of 51 Fermi-detected gamma-ray loud blazars with known radio Doppler factors and study properties of the Doppler factors of blazars at optical, X-ray and gamma-ray bands. A basic assumption is that the emission from the radio to gamma-ray bands of the blazars are produced by the nonthermal radiation of accelerated particles in a jet. Our results show that (1) the Doppler factors of blazars are a function of frequency, with the Doppler factor decreasing with frequency from the radio to X-ray regions, and then increasing from the X-ray to gamma-ray regions which are similar to results given by Zhang et al., and (2) there are marginal correlations between the Doppler factors at radio and X-ray bands and the synchrotron peak frequency, and a strong correlation between the Doppler factor in the gamma-ray band and the synchrotron peak frequency, but no correlation in the optical band.

• 出版日期2011-4
• 单位云南大学