J/A+A/644/A107 3C 129 candidate cluster galaxies (Ramatsoku+, 2020)
A near-infrared study of the obscured 3C129 galaxy cluster.
Ramatsoku M., Verheijen M.A.W, Kraan-Korteweg R.C., Jarrett T.H., Said K.,
Schroeder A.C.
<Astron. Astrophys. 644, A107 (2020)>
=2020A&A...644A.107R 2020A&A...644A.107R (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, IR ; Photometry, infrared
Keywords: atlases - catalogs - infrared: galaxies -
galaxy: clusters: individual: 3C219
Abstract:
We present a catalogue of 261 new infrared selected members of the
3C 129 galaxy cluster. The cluster, located at z=0.02, forms part of
the Perseus-Pisces filament and is obscured at optical wavelengths due
to its location in the zone of avoidance. We identified these galaxies
using the J- and K-band imaging data provided by the UKIDSS Galactic
Plane Survey within an area with a radius of 1.1° centred on the
X-ray emission of the cluster at (l, b) = (160.52°, 0.27°). A
total of 26 of the identified galaxy members have known redshifts 24
of which are from our 2016 Westerbork HI survey and two are from
optical spectroscopy. An analysis of the galaxy density at the core of
the 3C 129 cluster shows it to be less dense than the Coma and Norma
clusters, but comparable to the galaxy density in the core of the
Perseus cluster. From an assessment of the spatial and velocity
distributions of the 3C 129 cluster galaxies that have redshifts, we
derived a velocity of cz=5227±171km/s and=1097±252km/s for
the main cluster, with a substructure in the cluster outskirts at
cz=6923±71km/s with σ=422±100km/s. The presence of this
substructure is consistent with previous claims based on the X-ray
analysis that the cluster is not yet virialised and may have undergone
a recent merger.
Description:
We combined near-infrared images and colours from the UKIDSS Galactic
Plane Survey with HI data from the Westerbork Synthesis Radio
Telescope (WSRT - 1420MHz), in and around the 3C 129 cluster to
identify its galaxy members. This was done by analysing the properties
of the J-K versus K magnitude of galaxies to define and fit the
red-sequence of this cluster.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 124 261 Near-infrared parameters of 3C 129 candidate
cluster galaxies
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See also:
II/316 : UKIDSS-DR6 Galactic Plane Survey (Lucas+ 2012)
J/MNRAS/460/923 : WSRT ZoA Perseus-Pisces. HI catalogue (Ramatsoku+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/261] Galaxy identifying number
5- 23 A19 --- ZoA ZoA designation (JHHMMSS.ss+DDMMSS.s)
25- 30 F6.3 deg RAdeg Right Ascension (J2000.0)
32- 37 F6.3 deg DEdeg Declination (J2000.0)
39- 45 F7.3 deg GLON Galactic longitude
47- 52 F6.3 deg GLAT Galactic latitude
54- 57 F4.2 --- ell Ellipticity in the K-band at the
20mag/arcsec isophote
59- 64 F6.2 deg PA [] K-band position angle,
measured from celestial north to east
66- 70 F5.2 arcsec r K20 isophotal major-axis radius
72- 76 F5.2 mag Jmag UKIDSS J-band fiducial isophotal magnitude (1)
78- 81 F4.2 mag e_Jmag rms uncertainty on Jmag
83- 87 F5.2 mag Hmag UKIDSS H-band fiducial isophotal magnitude (1)
89- 92 F4.2 mag e_Hmag rms uncertainty on Hmag
94- 98 F5.2 mag Kmag UKIDSS K-band fiducial isophotal magnitude (1)
100-103 F4.2 mag e_Kmag rms uncertainty on Kmag
105-108 F4.2 mag E(B-V) Line-of-sight Galactic reddening
110-113 F4.2 mag J0-K0 J-K colour index, corrected for foreground
extinction
115-118 A4 --- Type Estimated morphology of galaxy
120-123 I4 km/s RV ? Radial velocity from WSRT HI measurements
except for J045006.67+450305.8 (3C 129.1)
and J044909.06+450039.4 (3C 129)
(optical velocities)
124 A1 --- n_RV [*x+] Radial velocity note (2)
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Note (1): not corrected for foreground extinction.
Note (2): Radial velocity notes as follows:
* = Optical velocities are from Spinrad, 1975ApJ...199L...1S 1975ApJ...199L...1S
+ = vopt=5150 (Takata et al., 1994A&AS..104..529T 1994A&AS..104..529T, Cat. J/A+AS/104/529)
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Acknowledgements:
Mpati Ramatsoku, mpati.ramatsoku(at)inaf.it
References:
Ramatsoku et al., Paper I 2016MNRAS.460..923R 2016MNRAS.460..923R, Cat. J/MNRAS/460/923
(End) Patricia Vannier [CDS] 09-Sep-2020