Beaming Effect in Fermi Blazars

W. X. Yang

doi:10.3847/1538-4357/ac3a09

2022-01-31

DOI：10.3847/1538-4357/ac3a09

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摘要

En 中文

Blazars show extreme observational properties that are due to the beaming effect with the jet being close to the line of sight. It was found that the observed luminosity is anticorrelated with the synchrotron peak frequency but the debeamed luminosity and the frequency is positively correlated. In this work, we revisit this correlation for a large sample of 255 blazars from the fourth Fermi catalog with available Doppler factors. Our analysis comes to the following conclusions. (1) The observed radio, X-ray, gamma-ray, and synchrotron peak luminosity are all anticorrelated with the peak frequency, but the debeamed luminosity is positively correlated with the debeamed peak frequency. The anticorrelation is due to a selection effect or a beaming effect. (2) The Compton dominance parameter is correlated with both the bolometric luminosity and Doppler factor, implying that the more highly Compton-dominated sources are more luminous. (3) The bolometric luminosity can be represented by the gamma-ray luminosity for Fermi blazars.

Keyword:

ACTIVE GALACTIC NUCLEI

DOPPLER FACTOR ESTIMATION

GAMMA-RAY EMISSION

RELATIVISTIC JETS

X-RAY

SPECTRAL VARIABILITY

LORENTZ FACTORS

VIEWING ANGLES

TEV BLAZARS

RADIO

期刊

Astrophysical Journal

IF:

5.4

论文数:

8.3W

被引数:

32.0W

机构

Guangzhou University

学者数:

1.8W

论文数: 1.3W

被引数: 1.8W

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