J/ApJS/258/32 Opt. & UV cat. of Abell 1882 galaxy members (Sengupta+, 2022)
The preprocessing of galaxies in the early stages of cluster formation in
Abell 1882 at z=0.139.
Sengupta A., Keel W.C., Morrison G., Windhorst R.A., Miller N., Smith B.
<Astrophys. J. Suppl. Ser., 258, 32 (2022)>
=2022ApJS..258...32S 2022ApJS..258...32S
ADC_Keywords: Clusters, galaxy; Galaxies, spectra; Redshifts; Optical;
Equivalent widths; Photometry, ultraviolet; Colors
Keywords: Abell clusters ; Galaxy environments ; Starburst galaxies ;
Galaxy evolution ; Galaxy quenching
Abstract:
A rare opportunity to distinguish between internal and environmental
effects on galaxy evolution is afforded by "SuperGroups," systems that
are rich and massive, but include several comparably rich
substructures, surrounded by filaments. We present here a
multiwavelength photometric and spectroscopic study of the galaxy
population in the SuperGroup Abell 1882 (A1882) at z=0.139, combining
new data from the MMT and Hectospec with archival results from the
Galaxy And Mass Assembly survey, the Sloan Digital Sky Survey, the
Nasa/IPAC Extragalactic Database, the Gemini Multi-Object
Spectrograph, and the Galaxy Evolution Explorer. These provide
spectroscopic classifications for 526 member galaxies, across wide
ranges of local density and velocity dispersion. We identify three
prominent filaments along which galaxies seem to be entering the
SuperGroup (mostly in E-W directions). A1882 has a well-populated red
sequence, containing most galaxies with stellar mass >1010.5M☉,
and a pronounced color-density relation even within its substructures.
Thus, galaxy evolution responds to the external environment as
strongly in these unrelaxed systems as we find in rich and relaxed
clusters. From these data, local density remains the primary factor,
with a secondary role for distance from the inferred center of the
entire structure's potential well. The effects on star formation, as
traced by optical and near-UV colors, depend on galaxy mass. We see
changes in lower-mass galaxies (M<1010.5M☉) at four times the
virial radius of major substructures, while the more massive near-UV
Green Valley galaxies show low levels of star formation within two
virial radii. The suppression of star formation ("quenching") occurs
in the infall regions of these structures even before the galaxies
enter the denser group environment.
Description:
We have constructed the largest available optical and UV galaxy
catalog for the A1882 SuperGroup, containing 526 member galaxies based
on their redshift distribution.
We have complemented the optical spectroscopic data from the MMT and
Hectospec at Mt. Hopkins with data from the Sloan Digital Sky Survey
(SDSS), the Galaxy And Mass Assembly (GAMA), the NASA/IPAC
Extragalactic Database (NED), and the Galaxy Evolution Explorer
(GALEX). We also have data from targeted observations using the Gemini
Multi-Object Spectrograph (GMOS) on Gemini South
(Gomez+ 2010AAS...21535103G and Miller+ 2010AAS...21641801M).
Objects:
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RA (ICRS) DE Designation(s)
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14 14 24.02 -00 22 39.9 Abell 1882 = ACO 1882
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 86 526 Galaxy catalog of Abell 1882 (Spectral data)
table3.dat 34 526 Galaxy catalog of Abell 1882 (Photometric data)
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See also:
VII/86 : Groups of Galaxies. I. Nearby Groups (Huchra+ 1982)
VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
J/ApJS/110/213 : Morphological Types in Distant Rich Clusters (Smail+ 1997)
J/ApJS/146/267 : Very rich Abell clusters radio analysis (Morrison+, 2003)
J/ApJ/591/53 : I photometry of Cl 0024+16 (Treu+, 2003)
J/MNRAS/370/1223 : Dynamical data of 15 nearby galaxy groups (Brough+, 2006)
J/ApJS/173/185 : GALEX UV atlas of nearby galaxies (Gil de Paz+, 2007)
J/ApJS/173/572 : GALEX/Spitzer photometry in NGC 7331 (Thilker+, 2007)
J/ApJS/173/293 : UV-Optical galaxy color-magnitude diagram I. (Wyder+, 2007)
J/MNRAS/404/1745 : Dwarf galaxies in Coma supercluster (Mahajan+, 2010)
J/MNRAS/452/2087 : Galaxy And Mass Assembly (GAMA): DR2 (Liske+, 2015)
J/MNRAS/474/4056 : Cen A MWA 154MHz image (McKinley+, 2018)
http://www.gama-survey.org/ : GAMA home page
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/526] Sequential running identifier
5- 15 F11.7 deg RAdeg [212.96/214.5] Right Ascension (J2000)
17- 24 F8.5 deg DEdeg [-1.15/0.34] Declination (J2000)
26- 30 F5.3 --- zspec [0.13/0.15] Spectroscopic redshift
32- 39 E8.2 --- e_zspec [4.4e-6/0.0013]? Uncertainty in zspec
41- 53 F13.9 0.1nm EWHa [-99.5/59]? Equivalent width, Hα
55- 62 F8.6 0.1nm e_EWHa [0.1/6.1]? Uncertainty in EWHa
64- 75 F12.9 --- Dn4000 [-1.4/3.8]? D4000 index or the 4000A break
77- 86 F10.8 --- e_Dn4000 [0.013/0.1]? Uncertainty in Dn4000
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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- 3 I3 --- Seq [1/526] Sequential running identifier
5- 9 F5.2 mag u-r [-0.25/6.28] u-r AB magnitude
11- 14 F4.2 mag e_u-r [0/0.38] Uncertainty in u-r
16- 20 F5.2 mag NUV-r [-1/7.24]? NUV-r AB magnitude
22- 25 F4.2 mag e_NUV-r [0.03/0.3]? Uncertainty in NUV-r
27- 31 F5.2 [Msun] logMgal [7.27/11.54] log of galaxy mass
33- 34 A2 --- Ref Source (1)
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Note (1): Reference as follows:
S1 = MMT/Hectospec observations (210 occurrences)
S2 = SDSS DR12 archive (see V/147 ; 85 occurrences)
S3 = NED database (23 occurrences)
S4 = Galaxy And Mass Assembly (GAMA) Survey
(Liske & Baldry 2015, J/MNRAS/452/2087); 170 occurrences)
S5 = Gemini Multi-Object Spectrographs (38 occurrences)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 17-May-2022