PoS - Proceedings of Science
Volume 395 - 37th International Cosmic Ray Conference (ICRC2021) - GAD - Gamma Ray Direct
Systematic X-ray study of GeV gamma-ray emitting radio galaxies
H. Matake* and Y. Fukazawa
Full text: pdf
Pre-published on: July 28, 2021
Published on: March 18, 2022
Only 10% of active galactic nuclei (AGNs) have a powerful radio jet, and these objects are roughly classified either radio galaxy or blazar. Blazars are bright but its radiation almost comes from the core jet because of strong beaming effect, while radio galaxies whose beaming effect is weak show various emission components from outer-layer jet, outer jet, and disk/corona. Therefore, radio galaxies are considered to be important objects to understand a relation between jet and disk. To study this relation is considered to be an important point to understand jet ejection mechanism X-ray emission from radio galaxies contain both jet and disk/corona radiation. Thus, we have to investigate contributions from jet and disk/corona to the X-ray band.
In this work, we investigate X-ray and Gamma-ray properties of GeV emitting radio galaxies listed in the 4FGL-DR2 catalog. We use X-ray data of Swift/XRT. We studied time variability, the relation between X-ray and gamma-ray photon index, together with accre-tion rate, and found they are classified into 3 groups; X-ray emission in the first group is dominated by jet emission, X-ray of the second group is dominated by disk/corona emis-sion, and for the third group both jet and disk/corona contribute to the X-ray band.
DOI: https://doi.org/10.22323/1.395.0635
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