Beaming Effect in Fermi Blazars

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 t...

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Bibliographic Details
Published in:The Astrophysical journal 2022-02, Vol.925 (2), p.120
Main Authors: Yang, W. X., Wang, H. G., Liu, Y., Yang, J. H., Xiao, H. B., Ye, X. H., Pei, Z. Y., Zhang, L. X., Fan, J. H.
Format: Article
Language:English
Subjects:
Active galactic nuclei
Astrophysics
Blazars
Bolometers
Correlation
Luminosity
Peak frequency
Synchrotrons
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Summary: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, γ -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 γ -ray luminosity for Fermi blazars.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ac3a09