A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei

Journal
Date Issued
2022
Author(s)
•
Lister, Matthew L.
•
Andernach, Heinz
•
Ciroi, Stefano
•
•
Antón, Sonia
•
Berton, Marco
•
DALLA BONTA', ELENA
•
Järvelä, Emilia
•
Marchã, Maria J. M.
•
•
Tornikoski, Merja
•
•
Vietri, Amelia
DOI
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....
Volume
8
Issue
11
Uri
Url
Issn Identifier
2218-1997
Rights
open.access
File(s)
Loading...
Thumbnail Image
Name

universe-08-00587-v2.pdf

Type

Pdf Editoriale

Size

1.66 MB

Format

Adobe PDF

Checksum (MD5)

42e9f7250c70a61497ff91af600ac5d8