In:
Astronomy & Astrophysics, EDP Sciences, Vol. 627 ( 2019-07), p. A108-
Abstract:
We present a catalog of compact double radio galaxies (hereafter COMP2 CAT ) listing 43 edge-brightened radio sources whose projected linear size does not exceed 60 kpc, the typical size of their host galaxies. This is the fifth in a series of radio source catalogs recently created, namely: FRI CAT , FRII CAT , FR0 CAT , and WAT CAT , each of which focuses on a different class of radio galaxies. The main aim of our analysis is to attain a better understanding of sources with intermediate morphologies between FR IIs and FR 0s. COMP2 CAT sources were selected from an existing catalog of radio sources based on NVSS, FIRST and SDSS observations because they have (i) edge-brightened morphologies typical of FR IIs, (ii) redshifts z 〈 0.15, and (iii) projected linear sizes smaller than 60 kpc. With radio luminosities at 1.4 GHz 10 38 ≲ L 1.4 ≲ 10 41 erg s −1 , COMP2 CAT sources appear as the low radio luminosity tail of FR IIs. However, their host galaxies are indistinguishable from those of large-scale radio sources: they are luminous (−21 ≳ M r ≳ −24), red, early-type galaxies with black hole masses in the range 10 7.5 ≲ M BH ≲ 10 9.5 M ⊙ . Moreover, all but one of the COMP2 CAT sources are optically classifiable as low-excitation radio galaxies, in agreement with being the low radio luminosity tail of FR Is and FR IIs. This catalog of compact double sources, which is ∼47% complete at z 〈 0.15, can potentially be used to clarify the role of compact double sources in the general evolutionary scheme of radio galaxies.
Type of Medium:
Online Resource
ISSN:
0004-6361
,
1432-0746
DOI:
10.1051/0004-6361/201935104
Language:
English
Publisher:
EDP Sciences
Publication Date:
2019
detail.hit.zdb_id:
1458466-9
SSG:
16,12
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