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Young radio sources at high-energies and the γ-ray CSO PKS 1718–649

Published online by Cambridge University Press:  07 April 2020

Giulia Migliori Open the ORCID record for Giulia Migliori [Opens in a new window]
Giulia Migliori*
Affiliation:
DIFA, Dipartimento di Fisica e Astronomia, Alma Mater Studiorum, Università degli Studi di Bologna, Via Gobetti 93/2, 40129 Bologna, Italy IRA, INAF Istituto di Radioastronomia, via Gobetti 101, 40129 Bologna, Italy email: g.migliori@ira.inaf.it
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Abstract

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Observations at high-energies are important to define the first stages of the evolution of extragalactic radio sources and to characterize the interstellar medium of their host galaxies. In some of the X-ray-observed Compact Symmetric Objects (CSOs, among the youngest and most compact radio galaxies), we measured values of the total hydrogen column densities large enough to slow or prevent the radio source growth. The γ-ray window has the potential to constrain the non-thermal contribution of jets and lobes to the total high-energy emission. However, so far, young radio sources remain elusive in γ-rays, with only a handful of detections (or candidates) reported by Fermi. I present our γ-ray study of the CSO PKS 1718–649, and draw comparison with the restarted, γ-ray detected, radio galaxy 3C 84.

Keywords

galaxies: activegalaxies: individual (PKS 1718–49)radiation mechanisms: non-thermalgamma-rays: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S342: Perseus in Sicily: From Black Hole to Cluster Outskirts , May 2018 , pp. 176 - 179
Copyright
© International Astronomical Union 2020

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