2025ApJS..276...46L


Query : 2025ApJS..276...46L

2025ApJS..276...46L - Astrophys. J., Suppl. Ser., 276, 46 (2025/February-0)

Identification of 4876 Bent-tail Radio Galaxies in the FIRST Survey Using Deep Learning Combined with Visual Inspection.

LAO B., ANDERNACH H., YANG X., ZHANG X., ZHAO R., ZHAO Z., YU Y., SUN X. and QIN S.-L.

Abstract (from CDS):

Bent-tail radio galaxies (BTRGs) are characterized by bent radio lobes. This unique shape is mainly caused by the movement of the galaxy within a cluster, during which the radio jets are deflected by the intracluster medium. A combined method, which involves a deep learning-based radio source finder along with visual inspection, has been utilized to search for BTRGs from the Faint Images of the Radio Sky at Twenty cm survey images. Consequently, a catalog of 4876 BTRGs has been constructed, among which 3871 are newly discovered. Based on the classification scheme of the opening angle between the two jets of the galaxy, BTRGs are typically classified as either wide-angle-tail (WAT) sources or narrow-angle-tail (NAT) sources. Our catalog comprises 4424 WATs and 652 NATs. Among these, optical counterparts are identified for 4193 BTRGs. This catalog covers luminosities in the range of 1.91 × 1020 ≤ L_1.4 GHz_ ≤ 1.45 × 1028 W Hz–1 and redshifts from z = 0.0023 to z = 3.43. Various physical properties of these BTRGs and their statistics are presented. Particularly, by the nearest neighbor method, we found that 1825 BTRGs in this catalog belong to galaxy clusters reported in literature.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Radio astronomy - Radio galaxies - Extragalactic radio sources - Active galactic nuclei

VizieR on-line data: <Available at CDS (J/ApJS/276/46): table1.dat table2.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 QSO B0042+101 BLL 00 44 58.7274656640 +10 26 53.126315376   17.4 18.00 18.1   ~ 41 2
2 IC 310 AGN 03 16 42.9787569912 +41 19 29.615579544   14.3       ~ 311 2
3 NGC 1265 rG 03 18 15.674 +41 51 27.94   14.7       ~ 386 2
4 NVSS J113850+203917 rG 11 38 50.2452976512 +20 39 18.305269020           ~ 12 1
5 NVSS J132140-063713 Rad 13 21 40.421 -06 37 15.42           ~ 2 1
6 NVSS J152125+510401 Rad 15 21 25.962 +51 03 56.49           ~ 2 1
7 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1

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