Large-scale environment of FR 0 radio galaxies
Journal
Date Issued
2020
Author(s)
Abstract
We explore the properties of the large-scale environment of the sources in the Faranoff-Riley class 0 catalog (FR0CAT). This sample includes 104 compact radio sources that are associated with nearby (z < 0.05) early-type galaxies. Using various estimators, we find that FR 0s are located in regions with higher than the average number of galaxies. The average galaxies density around FR 0s is a factor two lower with respect to FR I radio galaxies. This latter difference is driven by the large fraction (63%) of FR 0s that are located in groups formed by fewer than 15 galaxies. FR Is rarely (17%) inhabit an environment like this. In addition to the lack of substantial extended radio emission that defines the FR 0 class, this is the first significant difference between the properties of these two populations of low-power radio galaxies. We interpret the differences in environment between FR 0s and FR Is as due to an evolutionary link between local galaxies density, black hole spin, jet power, and extended radio emission.
Volume
633
Start page
A161
Issn Identifier
0004-6361
Ads BibCode
2020A&A...633A.161C
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
capetti20b.pdf
Description
PDF editoriale
Size
335.38 KB
Format
Adobe PDF
Checksum (MD5)
c3c283447cc878866d600594baf20b51