J/ApJS/254/30 One-side head-tail (OHT) galaxies from FIRST & SDSS (Pan+, 2021)
Catalog of one-side head-tail galaxies in the FIRST Survey.
Pan T., Yu H., van Weeren R.J., Jia S., Li C., Lyu Y.
<Astrophys. J. Suppl. Ser., 254, 30 (2021)>
=2021ApJS..254...30P 2021ApJS..254...30P
ADC_Keywords: Galaxies, radio; Clusters, galaxy; Photometry, SDSS; Redshifts
Keywords: Tailed radio galaxies ; Galaxy clusters ; Galaxy infall
Abstract:
One-side head-tail (OHT) galaxies are radio galaxies with a peculiar
shape. They usually appear in galaxy clusters, but they have never
been cataloged systematically. We design an automatic procedure to
search for them in the Faint Images of the Radio Sky at
Twenty-Centimeters source catalog and compile a sample with 115 HT
candidates. After cross-checking with the Sloan Digital Sky Survey
photometric data and catalogs of galaxy clusters, we find that 69 of
them are possible OHT galaxies. Most of them are close to the center
of galaxy clusters. The lengths of their tails do not correlate with
the projection distance to the center of the nearest galaxy clusters,
but show weak anticorrelation with the cluster richness, and are
inversely proportional to the radial velocity differences between
clusters and host galaxies. Our catalog provides a unique sample to
study this special type of radio galaxies.
Description:
The FIRST Survey used the VLA in its B configuration centered at
1.4GHz from 1993 through 2011 and acquired 3 minutes snapshots
covering about 10575 square degrees of sky. Its latest source catalog,
which was released on 2014 December 17, contains 946432 sources (VIII/92).
See Section 2.
The head of a real head-tail (HT) source coincides with its host
galaxy, while the shape of the tail shows its trajectory on the sky
plane. We cross-check our HT structures with the Sloan Digital Sky
Survey (SDSS) data. We adopt the photometric catalog of SDSS DR12
(Alam+ 2015, V/147). It covers 68% of the northern sky and about 90%
of the FIRST area. See Section 3.
We cross-check our one-side head-tail (OHT) candidates with the Abell
catalog (Abell+ 1989, VII/110) and cluster catalogs derived from the
SDSS survey, e.g., the WHL2015 catalog (Wen & Han 2015, J/ApJ/807/178),
the MSPM catalog (Smith+ 2012, J/MNRAS/422/25), the SDSSCG catalog
(McConnachie+ 2009, J/MNRAS/395/255 & Mendel+ 2011, J/MNRAS/418/1409),
and other cluster catalogs contained in the NASA/IPAC Extragalactic
Database (NED) to search for possible host clusters around OHT
candidates. See Section 4.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 89 69 The list of one-side head-tail (OHT) candidates and
their corresponding galaxies and galaxy clusters
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See also:
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/51 : the FIRST Survey, version 1998Feb (White+ 1998)
VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
J/MNRAS/395/255 : Compact groups of galaxies in SDSS DR6 (McConnachie+, 2009)
J/MNRAS/418/1409 : Compact groups of galaxies in SDSS DR7 (Mendel+, 2011)
J/ApJS/194/31 : Morphology for groups in the FIRST database (Proctor, 2011)
J/MNRAS/422/25 : SDSS DR7 groups, clusters and filaments (Smith+, 2012)
J/ApJ/807/178 : Newly rich galaxy clusters in SDSS-DR12 (Wen+, 2015)
J/A+A/598/A78 : The GMRT 150MHz all-sky radio survey (Intema+, 2017)
J/MNRAS/466/4346 : Properties of extended radio galaxies (Miraghaei+, 2017)
J/A+A/598/A104 : LOFAR Two-metre Sky Survey (Shimwell+, 2017)
J/AJ/157/126 : Distortion of radio gal. by galaxy clusters (Garon+, 2019)
J/A+A/622/A1 : LOFAR 2-m Sky Survey DR1 source catalog (Shimwell+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq [1/69] Running sequence number
4- 19 A16 --- FIRST FIRST identifier (JHHMMSS.s+DDMMSS)
21- 39 I19 --- objID SDSS objID
41- 45 F5.2 mag rmag [13.86/20.79] SDSS r-band AB magnitude
47- 51 F5.3 --- zGal [0.04/0.64] Galaxy spectroscopic redshift
unless flagged (zg)
53 A1 --- f_zGal [*] * = SDSS photometric redshift
55- 74 A20 --- Cluster Associated cluster name
76- 80 F5.3 --- zCl [0.04/0.52]? Cluster spectroscopic redshift
unless flagged (zcl)
82 A1 --- f_zCl [*] * = SDSS photometric redshift
84- 89 F6.3 Mpc Dist [0.03/11.4]? Projection distance between the
head and the cluster center (Dcl)
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 19-Aug-2021