Comparison between {textit{Fermi}} Detected and {textit{non-Fermi}} Detected Superluminal Sources. (arXiv:1902.10764v1 [astro-ph.HE])

Comparison between {textit{Fermi}} Detected and {textit{non-Fermi}} Detected Superluminal Sources. (arXiv:1902.10764v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Xiao_H/0/1/0/all/0/1">Hubing Xiao</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:+Liu_Y/0/1/0/all/0/1">Yi Liu</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yuan_Y/0/1/0/all/0/1">Yuhai Yuan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tao_J/0/1/0/all/0/1">Jun Tao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Costantin_D/0/1/0/all/0/1">Denise Costantin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_Y/0/1/0/all/0/1">Yutao Zhang</a>, <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:+Zhang_L/0/1/0/all/0/1">Lixia Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yang_W/0/1/0/all/0/1">Wenxin Yang</a>

Active galactic nuclei (AGNs) have been attracting research attention due to
their special observable properties. Specifically, a majority of AGNs are
detected by Fermi-LAT missions, but not by Fermi-LAT, which raises the question
of whether any differences exist between the two. To answer this issue, we
compile a sample of 291 superluminal AGNs (189 FDSs and 102 non-FDSs) from
available multi-wavelength radio, optical, and X-ray (or even $gamma$-ray)
data and Doppler factors and proper motion ($mu$) (or apparent velocity
($beta_{rm{app}}$)); calculated the apparent velocity from their proper
motion, Lorentz factor ($Gamma$), viewing angle ($phi$) and co-moving viewing
angle ($phi_{co}$) for the sources with available Doppler factor ($delta$);
and performed some statistical analyses for both types. Our study indicated
that1. In terms of average values, FDSs have higher proper motions ($mu$),
apparent velocities ($beta_{rm app}$), Doppler factor ($delta$), Lorentz
factor ($Gamma$), and smaller viewing angle ($phi$). Nevertheless, there is
no clear difference in co-moving viewing angles ($phi_{rm co}$).

Active galactic nuclei (AGNs) have been attracting research attention due to
their special observable properties. Specifically, a majority of AGNs are
detected by Fermi-LAT missions, but not by Fermi-LAT, which raises the question
of whether any differences exist between the two. To answer this issue, we
compile a sample of 291 superluminal AGNs (189 FDSs and 102 non-FDSs) from
available multi-wavelength radio, optical, and X-ray (or even $gamma$-ray)
data and Doppler factors and proper motion ($mu$) (or apparent velocity
($beta_{rm{app}}$)); calculated the apparent velocity from their proper
motion, Lorentz factor ($Gamma$), viewing angle ($phi$) and co-moving viewing
angle ($phi_{co}$) for the sources with available Doppler factor ($delta$);
and performed some statistical analyses for both types. Our study indicated
that1. In terms of average values, FDSs have higher proper motions ($mu$),
apparent velocities ($beta_{rm app}$), Doppler factor ($delta$), Lorentz
factor ($Gamma$), and smaller viewing angle ($phi$). Nevertheless, there is
no clear difference in co-moving viewing angles ($phi_{rm co}$).

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