Beamed and unbeamed emission of $gamma$-ray blazars. (arXiv:2009.06624v1 [astro-ph.HE])

Beamed and unbeamed emission of $gamma$-ray blazars. (arXiv:2009.06624v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Pei_Z/0/1/0/all/0/1">Zhiyuan Pei</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fan_J/0/1/0/all/0/1">Junhui Fan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yang_J/0/1/0/all/0/1">Jianghe Yang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bastieri_D/0/1/0/all/0/1">Denis Bastieri</a>

A two-component model of radio emission has been used to explain some radio
observational properties of Active Galactic Nuclei (AGNs) and, in particular,
of blazars. In this work, we extend the two-component idea to the $gamma$-ray
emission and assume that the total $gamma$-ray output of blazars consists of
relativistically beamed and unbeamed components. The basic idea leverages the
correlation between the radio core-dominance parameter and the $gamma$-ray
beaming factor. To do so, we evaluate this correlation for a large sample of
584 blazars taken from the fourth source catalog of the Fermi Large Area
Telescope (Fermi-LAT) and correlated their $gamma$-ray core-dominance
parameters with radio core-dominance parameters. The $gamma$-ray beaming
factor is then used to estimate the beamed and unbeamed components. Our
analysis confirms that the $gamma$-ray emission in blazars is mainly from the
beamed component.

A two-component model of radio emission has been used to explain some radio
observational properties of Active Galactic Nuclei (AGNs) and, in particular,
of blazars. In this work, we extend the two-component idea to the $gamma$-ray
emission and assume that the total $gamma$-ray output of blazars consists of
relativistically beamed and unbeamed components. The basic idea leverages the
correlation between the radio core-dominance parameter and the $gamma$-ray
beaming factor. To do so, we evaluate this correlation for a large sample of
584 blazars taken from the fourth source catalog of the Fermi Large Area
Telescope (Fermi-LAT) and correlated their $gamma$-ray core-dominance
parameters with radio core-dominance parameters. The $gamma$-ray beaming
factor is then used to estimate the beamed and unbeamed components. Our
analysis confirms that the $gamma$-ray emission in blazars is mainly from the
beamed component.

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