J/MNRAS/496/3182 Low surface brightness galaxies in Coma cluster (Alabi+, 2020)
An expanded catalogue of low surface brightness galaxies in the Coma cluster
using Subaru/Suprime-Cam.
Alabi A.B., Romanowsky A.J., Forbes D.A., Brodie J.P., Okabe N.
<Mon. Not. R. Astron. Soc., 496, 3182-3197 (2020)>
=2020MNRAS.496.3182A 2020MNRAS.496.3182A (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Galaxies, radius ;
Positional data ; Optical
Keywords: galaxies: clusters: individual: Coma -
galaxies: fundamental parameters - galaxies: photometry
Abstract:
We present a catalogue of low surface brightness (LSB) galaxies in the
Coma cluster obtained from deep Subaru/Suprime-Cam V- and R-band
imaging data within a region of ∼4deg2. We increase the number of
LSB galaxies presented in Yagi et al. (2016ApJS..225...11Y 2016ApJS..225...11Y, Cat.
J/ApJS/225/11) by a factor of ∼3 and report the discovery of 29 new
ultradiffuse galaxies (UDGs). We compile the largest sample of UDGs
with colours and structural parameters in the Coma cluster. While most
UDGs lie along the red-sequence relation of the colour-magnitude
diagram, ∼16 per cent are outside (bluer or redder) the red-sequence
region of Coma cluster galaxies. Our analyses show that there is no
special distinction in the basic photometric parameters between UDGs
and other LSB galaxies. We investigate the clustercentric colour
distribution and find a remarkable transition at a projected radius of
∼0.6Mpc. Within this cluster core region and relative to the
red-sequence of galaxies, LSB galaxies are on average redder than
co-spatial higher surface brightness galaxies at the 2σ level,
highlighting how vulnerable LSB galaxies are to the physical processes
at play in the dense central region of the cluster. The position of
the transition radius agrees with expectations from recent
cosmological simulation of massive galaxy clusters within which
ancient infalls are predicted to dominate the LSB galaxy population.
Description:
We analyse the Coma cluster Subaru/Suprime-Cam (Miyazaki et al.
2002PASJ...54..833M 2002PASJ...54..833M) V- and R-band imaging data previously reduced and
published in the weak-lensing study of Okabe et al.
(2014ApJ...784...90O 2014ApJ...784...90O). The imaging is made up of a mosaic of 18
individual pointings with 2arcmin overlap between adjacent fields and
a total sky coverage of ∼4deg2. Details of the exposure times and
seeing per pointing can be found in Okabe et al. (2014ApJ...784...90O 2014ApJ...784...90O)
alongside a summary of the data reduction process. Average exposure
time and seeing full width half maximum (FWHM) are 14min and 1arcsec
and 26min and 7arcsec, in the V and R bands, respectively. We note
that our R-band imaging is slightly different from that used by Yagi
et al. (2016ApJS..225...11Y 2016ApJS..225...11Y, Cat. J/ApJS/225/11), where they included
additional imaging data with worse seeing in 4 pointings in their
analysis.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 203 9179 Catalogue of Coma cluster galaxies with
structural parameters from GALFIT analysis
table3.dat 93 29 Newly discovered UDGs in the Coma cluster
catalogued here for convenience
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See also:
J/ApJS/225/11 : Subaru-UDGs in the Coma cluster (Yagi+, 2016)
VII/42A : GMP catalogue: galaxies in the Coma cluster (Godwin+ 1983)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Galaxy name (COMANNNNNN)
14- 22 F9.5 deg RAdeg Right ascension (J2000)
24- 32 F9.6 deg DEdeg Declination (J2000)
34- 38 F5.2 mag Vmag Total AB V-band magnitude (1)
40- 44 F5.3 mag e_Vmag Error on Vmag
46- 50 F5.2 kpc ReffV V-band circularized effective radius
52- 56 F5.3 kpc e_ReffV Error on ReffV
58- 62 F5.2 mag/arcsec2 SBV V-band mean surface brightness within
the effective radius
64- 68 F5.3 mag/arcsec2 e_SBV Error on SBV
70- 74 F5.2 --- nV V-band Sersic index
76- 80 F5.3 --- e_nV Error on nV
82- 85 F4.2 --- qV V-band axial ratio
87- 91 F5.3 --- e_qV Error on qV
93- 98 F6.2 deg PAV V-band position angle measured East
from North
100- 104 F5.2 mag Rmag Total AB R-band magnitude (1)
106- 110 F5.3 mag e_Rmag Error on Rmag
112- 116 F5.2 kpc ReffR R-band circularized effective radius
118- 122 F5.3 kpc e_ReffR Error on ReffR
124- 128 F5.2 mag/arcsec2 SBR R-band mean surface brightness within
the effective radius
130- 134 F5.3 mag/arcsec2 e_SBR Error on SBR
136- 140 F5.2 --- nR R-band Sersic index
142- 146 F5.3 --- e_nR Wrror on nR
148- 151 F4.2 --- qR R-band axial ratio
153- 157 F5.3 --- e_qR Error on qR
159- 164 F6.2 deg PAR R-band position angle measured East
from North
166- 170 F5.2 mag V-R ? Galaxy V-B colour obtained from
SExtractor analysis
172- 174 A3 --- SBclass Surface brightness category (2)
176- 178 A3 --- RS Indicates galaxies with colours redder
than the 1σ limit around the
red-sequence
180- 186 A7 --- GodwinID Identifier from Godwin et al.
(1983MNRAS.202..113G 1983MNRAS.202..113G, Cat. VII/42A)
188- 191 A4 --- YagiID Identifier from Yagi et al.
(2016ApJS..225...11Y 2016ApJS..225...11Y,
Cat. J/ApJS/225/11)
193- 197 A5 --- Features Tidal features (3)
199- 203 A5 --- Comment Other comments
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Note (1): V-band and R-band magnitudes are K-corrected and corrected for
Galactic extinction
Note (2): Surface brightness category as defined in Section 6 as follows:
HSB = high surface brightness galaxy (2290/9179)
ISB = intermediate surface brightness galaxy (3833/9179)
LSB = low surface brightness galaxy (3056/9179)
Note (3): Tidal features as follows:
I = Interacting
D = Disturbed morphology
JF = Jelly-fish
R = Rings
P = Plumes
S = Shells
L = Loops
D-N = Double nuclei
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Galaxy name (COMANNNNNN)
14- 22 F9.5 deg RAdeg Right ascension (J2000)
24- 32 F9.6 deg DEdeg Declination (J2000)
34- 38 F5.2 mag Vmag Total AB V-band magnitude K-corrected and
corrected for Galactic extinction
40- 43 F4.2 mag e_Vmag Error on Vmag
45- 48 F4.2 kpc ReffV V-band circularized effective radius
50- 53 F4.2 kpc e_ReffV Error on ReffV
55- 59 F5.2 mag/arcsec2 SBV V-band mean surface brightness within the
effective radius
61- 64 F4.2 mag/arcsec2 e_SBV Error on SBV
66- 69 F4.2 --- nV V-band Sersic index
71- 74 F4.2 --- e_nV Error on nV
76- 79 F4.2 --- qV V-band axial ratio
81- 84 F4.2 --- e_qV Error on qV
86- 88 I3 deg PAV V-band position angle measured East from
North
90- 93 F4.2 mag V-R Galaxy V-B colour obtained from SExtractor
analysis
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 04-Jul-2023