J/ApJS/267/10 Ultradiffuse gal. with HSC. I. Coma cluster UDGs (Bautista+, 2023)
Ultradiffuse galaxies (UDGs) with Hyper Suprime-Cam.
I. Revised catalog of Coma Cluster UDGs.
Bautista J.M.G., Koda J., Yagi M., Komiyama Y., Yamanoi H.
<Astrophys. J. Suppl. Ser., 267, 10 (2023)>
=2023ApJS..267...10B 2023ApJS..267...10B
ADC_Keywords: Clusters, galaxy; Galaxies, photometry; Galaxies, radius;
Morphology; Optical
Keywords: Low surface brightness galaxies ; Galaxies ;
Galactic and extragalactic astronomy ; Galaxy clusters ;
Coma Cluster ; Galaxy structure
Abstract:
This is the first in a series of papers on the properties of
ultradiffuse galaxies (UDGs) in clusters of galaxies. We present an
updated catalog of UDGs in the Coma Cluster using g- and r-band images
obtained with Hyper Suprime-Cam (HSC) of the Subaru telescope. We
develop a method to find UDGs even in the presence of contaminating
objects, such as halos and background galaxies. This study expands
upon our previous works that covered about half the area of the Coma
Cluster. The HSC observations covered the whole Coma Cluster up to the
virial radius and beyond (an area twice as large as the previous
studies) and doubled the numbers of UDGs (reff,r≥1.5kpc) and
sub-UDGs (1.0≤reff, r<1.5kpc) to 774 and 729, respectively. The new
UDGs show internal properties consistent with those of previous
studies (e.g., a Sersic index of approximately 1), and are distributed
across the cluster, with a concentration around the cluster center.
The whole cluster coverage clearly revealed an excess of their
distribution toward the east to southwest direction along the cluster
center, where Coma connects to other large-scale structure, and where
a known substructure exists (the NGC 4839 subgroup). The alignment of
the UDG distribution along the large-scale structure around Coma
supports the interpretation that most of them lie at the distance of
the Coma Cluster and the NGC 4839 subgroup.
Description:
The Coma Cluster was observed in the g and r bands using Hyper
Suprime-Cam (HSC) on the Subaru telescope in 2016 March and in
2017 March and June. HSC has 104 CCD detectors, providing a roughly
circular field of view with a diameter of ∼1.5° and a scale of
0.168". The coverage consists of seven pointings of the camera in a
hexagonal pattern (see Figure 1) combined into a single ∼15deg2
tract that spans the large cluster up to its virial radius of 3Mpc.
Typical integration times in the r and g bands are about 48 and
136 minutes in total per pointing, respectively. See Section 3.
Throughout this paper, we adopted cosmological parameters of
(h0, ΩM, ΩΛ)=(0.697, 0.282, 0.718) and a
distance modulus for the Coma Cluster of (m-M)0=35.05. These
parameters correspond to a luminosity distance of 102Mpc, and
0.473kpc/arcsec with an angular diameter distance of 98Mpc.
Objects:
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RA (ICRS) DE Designation(s)
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12 59 48.69 +27 58 49.9 Coma Cluster = NAME Coma Cluster
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 129 1503 GALFIT g- and r- parameters for ultradiffuse
galaxies (UDGs)
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See also:
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
J/A+A/459/679 : RB photometry of LSBG in Coma (Adami+, 2006)
J/A+A/463/503 : Early-type dwarf galaxies in Fornax cluster (Mieske+, 2007)
J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)
J/MNRAS/445/2385 : HST/ACS Coma Cluster Survey. X. (den Brok+, 2014)
J/ApJ/813/L15 : Dwarf galaxies in Fornax cluster from NGFS (Munoz+, 2015)
J/ApJS/225/11 : Subaru-UDGs in the Coma cluster (Yagi+, 2016)
J/ApJ/842/133 : HI-bearing ultra-diffuse ALFALFA galaxies (Leisman+, 2017)
J/MNRAS/468/703 : Abell 168 ultra-diffuse galaxies distribution (Roman+, 2017)
J/A+A/608/A142 : Fornax Deep Survey with VST. III. LSB gal. (Venhola+, 2017)
J/ApJ/857/104 : Low surface brightness galaxies from HSC-SSP (Greco+, 2018)
J/ApJ/859/52 : NGFS. III. Gal. in outer regions (Ordenes-Briceno+, 2018)
J/ApJ/878/18 : NGVS. XXIII. Nuclear star clusters (Sanchez-Janssen+, 2019)
J/ApJS/240/1 : SMUDGes. I. The Coma Cluster (Zaritsky+, 2019)
J/ApJS/247/46 : Opt. phot. of SMUDGes ultra-diffuse gal. (Barbosa+, 2020)
J/ApJ/923/257 : UDGs with spectroscopic obs. (Kadowaki+, 2021)
J/A+A/654/A105 : MATLAS ultra diffuse galaxies (Marleau+, 2021)
J/ApJS/252/18 : Low-surface-brightness gal. from DES Y3 (Tanoglidis+, 2021)
J/ApJS/257/60 : SMUDGes. II. Expanded survey & Stripe 82 (Zaritsky+, 2021)
J/A+A/667/A76 : 64 Virgo galaxies radial surface brightness (Junais+, 2022)
J/ApJS/261/11 : SMUDGes. III. The Southern catalog (Zaritsky+, 2022)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/1503] Running sequence number
6- 7 I2 h RAh [12/13] Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 17 F6.3 s RAs Second of Right Ascension (J2000)
19 A1 --- DE- [+] Sign of the Declination (J2000)
20- 21 I2 deg DEd [26/29] Degree of Declination (J2000)
23- 24 I2 arcmin DEm Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Arcsecond of Declination (J2000)
32- 36 F5.2 mag rmag [16.6/23] Subaru/HSC apparent r-band AB
magnitude
38- 43 F6.3 kpc reff-r [1/10.1] r-band effective radius
45- 48 F4.2 --- nr [0.2/3.8] r-band Sersic index
50- 53 F4.2 --- qr [0.25/1] r-band axis ratio
55- 60 F6.2 deg PAr [-90/90]? r-band position angle
62- 63 I2 h RARh [12/13]? r-band PSF Hour of Right Ascension
(J2000)
65- 66 I2 min RARm ? r-band PSF Minute of Right Ascension (J2000)
68- 73 F6.3 s RARs ? r-band PSF Second of Right Ascension (J2000)
75 A1 --- DER- [+] Sign of the r-band PSF Declination (J2000)
76- 77 I2 deg DERd [26/29]? r-band PSF Degree of Declination
(J2000)
79- 80 I2 arcmin DERm ? r-band PSF Arcminute of Declination (J2000)
82- 86 F5.2 arcsec DERs ? r-band PSF Arcsecond of Declination (J2000)
88- 92 F5.2 mag rPSFmag [22.45/27.11]? r-band PSF magnitude
94- 98 F5.2 mag gmag [16.7/23.4] Subaru/HSC apparent g-band
AB magnitude
100- 105 F6.3 kpc reff-g [0.89/12] g-band effective radius
107- 110 F4.2 --- qg [0.23/1] g-band axis ratio
112- 117 F6.2 deg PAg [-90/90]? g-band position angle
119- 123 F5.2 mag gPSFmag [23.28/29.1]? g-band PSF magnitude
125- 129 F5.2 mag g-r [-0.6/0.98] The (g-r) color within a 2kpc
radius aperture
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Aug-2023