Foschini, Luigi;
Lister, Matthew L;
Andernach, Heinz;
Ciroi, Stefano;
Marziani, Paola;
Antón, Sonia;
Berton, Marco;
... Vietri, Amelia; + view all
(2022)
A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei.
Universe
, 8
(11)
, Article 587. 10.3390/universe8110587.
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Abstract
We considered the fourth catalog of gamma-ray point sources produced by the Fermi Large Area Telescope (LAT) and selected only jetted active galactic nuclei (AGN) or sources with no specific classification, but with a low-frequency counterpart. Our final list is composed of 2980 gamma-ray point sources. We then searched for optical spectra in all the available literature and publicly available databases, to measure redshifts and to confirm or change the original LAT classification. Our final list of gamma-ray emitting jetted AGN is composed of BL Lac Objects (40%), flat-spectrum radio quasars (23%), misaligned AGN (2.8%), narrow-line Seyfert 1, Seyfert, and low-ionization nuclear emission-line region galaxies (1.9%). We also found a significant number of objects changing from one type to another, and vice versa (changing-look AGN, 1.1%). About 30% of gamma-ray sources still have an ambiguous classification or lack one altogether.
| Type: | Article |
|---|---|
| Title: | A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/universe8110587 |
| Publisher version: | https://doi.org/10.3390/universe8110587 |
| Language: | English |
| Additional information: | © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | BL Lac objects; quasars; Seyfert galaxies; relativistic jets |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10181298 |
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