J/ApJS/252/18 Low-surface-brightness galaxies from DES Y3 (Tanoglidis+, 2021)
Shadows in the dark: low-surface-brightness galaxies discovered in the Dark
Energy Survey.
Tanoglidis D., Drlica-Wagner A., Wei K., Li T.S., Sanchez J.,
Zhang Y., Peter A.H.G., Feldmeier-Krause A., Prat J., Casey K., Palmese A.,
Sanchez C., DeRose J., Conselice C., Gagnon L., Abbott T.M.C., Aguena M.,
Allam S., Avila S., Bechtol K., Bertin E., Bhargava S., Brooks D.,
Burke D.L., Rosell A.C., Kind M.C., Carretero J., Chang C., Costanzi M.,
da Costa L.N., De Vicente J., Desai S., Diehl H.T., Doel P., Eifler T.F.,
Everett S., Evrard A.E., Flaugher B., Frieman J., Garcia-Bellido J.,
Gerdes D.W., Gruendl R.A., Gschwend J., Gutierrez G., Hartley W.G.,
Hollowood D.L., Huterer D., James D.J., Krause E., Kuehn K., Kuropatkin N.,
Maia M.A.G., March M., Marshall J.L., Menanteau F., Miquel R.,
Ogando R.L.C., Paz-Chinchon F., Romer A.K., Roodman A., Sanchez E.,
Scarpine V., Serrano S., Sevilla-Noarbe I., Smith M., Suchyta E., Tarle G.,
Thomas D., Tucker D.L., Walker A.R. (The DES Collaboration)
<Astrophys. J. Suppl. Ser., 252, 18 (2021)>
=2021ApJS..252...18T 2021ApJS..252...18T
ADC_Keywords: Galaxies, photometry; Optical; Surveys; Morphology
Keywords: Sky surveys ; Low surface brightness galaxies
Abstract:
We present a catalog of 23790 extended low-surface-brightness galaxies
(LSBGs) identified in ∼5000°2 from the first three years of
imaging data from the Dark Energy Survey (DES). Based on a
single-component Sersic model fit, we define extended LSBGs as
galaxies with g-band effective radii Reff(g)>2.5" and mean surface
brightness µeff(g)>24.2mag/arcsec2. We find that the
distribution of LSBGs is strongly bimodal in (g-r) versus (g-i) color
space. We divide our sample into red (g-i≥0.60) and blue (g-i<0.60)
galaxies and study the properties of the two populations. Redder LSBGs
are more clustered than their blue counterparts and are correlated
with the distribution of nearby (z<0.10) bright galaxies. Red LSBGs
constitute ∼33% of our LSBG sample, and ∼30% of these are located
within 1° of low-redshift galaxy groups and clusters (compared to
∼8% of the blue LSBGs). For nine of the most prominent galaxy groups
and clusters, we calculate the physical properties of associated LSBGs
assuming a redshift derived from the host system. In these systems, we
identify 41 objects that can be classified as ultradiffuse galaxies,
defined as LSBGs with projected physical effective radii Reff>1.5kpc
and central surface brightness µ0(g)>24.0mag/arcsec2. The
wide-area sample of LSBGs in DES can be used to test the role of
environment on models of LSBG formation and evolution.
Description:
The Dark Energy Survey (DES) is an optical-near-infrared imaging
survey covering ∼5000°2 of the southern Galactic cap using the
Dark Energy Camera (DECam) on the 4-m Blanco Telescope at the Cerro
Tololo Inter-American Observatory (CTIO). We use data collected from
the first three years of DES observing (DES Y3 Gold; 2013-August --
2016-February).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 99 82 Characteristics of the most prominent density peaks
and their association
tabled1.dat 494 23790 Extended low-surface-brightness galaxy catalog
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See also:
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
VII/180 : Galaxies in Fornax Cluster and five nearby groups (Ferguson+ 1990)
II/371 : The Dark Energy Survey (DES): Data Release 2 (Abott+, 2021)
J/A+AS/134/59 : The central Fornax Cluster. I. Galaxy phot. (Hilker+ 1999)
J/A+A/425/367 : REFLEX Galaxy Cluster Survey catalogue (Boehringer+, 2004)
J/MNRAS/355/1303 : Rmag surface brightness of HIDEEP galaxies (Minchin+, 2004)
J/MNRAS/357/819 : Colours and HI line observations in Virgo (Sabatini+, 2005)
J/A+A/459/679 : RB photometry of LSBG in Coma (Adami+, 2006)
J/MNRAS/410/166 : Morphological types from Galaxy Zoo 1 (Lintott+, 2011)
J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)
J/ApJ/776/80 : PAndAS view of Andromeda satellites. I. (Martin+, 2013)
J/ApJ/813/L15 : Dwarf galaxies in Fornax cluster from NGFS (Munoz+, 2015)
J/AJ/149/171 : 2MASS galaxy group catalog (Tully, 2015)
J/ApJ/833/167 : PAndAS view of Andromeda satellites. II. (Martin+, 2016)
J/A+A/608/A142 : Fornax Deep Survey with VST. III. LSB gal. (Venhola+, 2017)
J/MNRAS/470/1512 : Faint LSB galaxy cand. in Perseus cluster (Wittmann+, 2017)
J/ApJ/855/142 : Next Generation Fornax Survey. II. (Eigenthaler+, 2018)
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/A+A/620/A165 : Fornax Deep Survey with VST. IV. Dwarf gal. (Venhola+, 2018)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
-------------------------------------------------------------------------------
1- 2 I2 --- Seq [1/82] Peak Number
4- 16 F13.9 deg RAdeg [-60/90.4] Peak Right Ascension (J2000)
18- 30 F13.9 deg DEdeg [-62.8/3.2] Peak Declination (J2000)
32- 47 A16 --- Assoc Best Association Name
49- 59 F11.7 deg RAAdeg [-58.6/90.5] Association Right Ascension (J2000)
61- 70 F10.6 deg DEAdeg [-61.5/3.2] Association Declination (J2000)
72- 79 F8.5 --- z [-0.84/0.1]?=-1 Redshift for association (1)
81- 86 F6.2 Mpc Dist [18.97/430]?=-1 Distance to association (1)
88- 92 F5.2 Mpc e_Dist [1.3/31]?=-1 Uncertainty in Dist (1)
94- 95 I2 --- NLSBG [13/68] Number of LSBGs<0.5deg from peak center
97- 99 A3 --- Qual Association quality (I=very good, II=good,
III=not so good)
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Note (1): Redshift and distance values from NED.
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Byte-by-byte Description of file: tabled1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- ID [0/23789] Object sequential identifier
7- 15 I9 --- Coadd [61426632/618665124] Coadd object identifier
17- 26 F10.6 deg RAdeg [0.0048/360] Right Ascension, decimal
degrees, SourceExtractor (J2000)
28- 37 F10.6 deg DEdeg [-68.2/5.4] Declination, decimal
degrees, SourceExtractor (J2000)
39- 51 F13.9 deg RAGdeg [0.0046/360] Right Ascension, decimal
degrees, galfitm (J2000)
53- 65 F13.9 deg DEGdeg [-68.2/5.4] Declination, decimal
degrees, galfitm (J2000)
67- 73 F7.5 mag E(B-V) [0.002/0.22] Reddening, E(B-V)
Schlegel+ (1998ApJ...500..525S 1998ApJ...500..525S)
75- 85 F11.9 --- ellSE [0.0014/0.8] Isophotal ellipticity,
SourceExtractor
87- 97 F11.9 --- ellG [2.9e-7/0.85] Isophotal ellipticity, galfitm
99- 107 F9.6 mag gmagSE [15.8/22.8] g-band MAG_AUTO,
SourceExtractor
109- 119 F11.9 mag e_gmagSE [0.0019/0.2] Uncertainty in gmagSE
121- 129 F9.6 mag rmagSE [15.5/22.5] r-band MAG_AUTO,
SourceExtractor
131- 141 F11.9 mag e_rmagSE [0.002/0.2] Uncertainty in rmagSE
143- 152 F10.7 mag imagSE [15.35/22.3] i-band MAG_AUTO,
SourceExtractor
154- 164 F11.9 mag e_imagSE [0.003/0.3] Uncertainty in imagSE
166- 175 F10.7 arcsec gRadSE [2.5/22] SourceExtractor FLUX_RADIUS g-band
177- 186 F10.7 arcsec rRadSE [1.59/21.9] SourceExtractor FLUX_RADIUS
r-band
188- 197 F10.7 arcsec uRadSE [1/21.7] SourceExtractor FLUX_RADIUS i-band
199- 207 F9.6 mag gmagG [15.4/22.5] g-band, galfitm
209- 219 F11.9 mag e_gmagG [0.002/0.4] Uncertainty in gmagG
221- 229 F9.6 mag rmagG [15.19/22.2] r-band, galfitm
231- 241 F11.9 mag e_rmagG [0.002/0.3] Uncertainty in rmagG
243- 252 F10.7 mag imagG [15.1/22.3] i-band, galfitm
254- 264 F11.9 mag e_imagG [0.003/0.4] Uncertainty in imagG
266- 275 F10.8 --- n [0.2/5] Sersic index
277- 287 F11.9 --- e_n [0.0015/1.11] Uncertainty in n
289- 298 F10.7 kpc gReff [2.5/43.8] Physical effective radius, g-band
300- 310 F11.9 kpc e_gReff [0.017/2.9] Uncertainty in gReff
312- 321 F10.7 kpc rReff [2/41.1] Physical effective radius, r-band
323- 333 F11.9 kpc e_rReff [0.012/2.6] Uncertainty in rReff
335- 344 F10.7 kpc iReff [1.26/38.8] Physical effective radius,
i-band
346- 356 F11.9 kpc e_iReff [0.015/2.7] Uncertainty in iReff
358- 370 F13.8 --- gchi2 [0.47/7716] χ^2, loc, g-band
372- 384 F13.8 --- rchi2 [0.33/3346] χ^2, loc, r-band
386- 398 F13.8 --- ichi2 [0.2/2183] χ^2, loc, i-band
400- 408 F9.6 mag/arcsec2 gmu [24.2/27.2] Mean surface brightness, g-band
410- 418 F9.6 mag/arcsec2 rmu [22.66/26.4] Mean surface brightness, r-band
420- 428 F9.6 mag/arcsec2 imu [21/26.3] Mean surface brightness, i-band
430- 440 F11.8 mag/arcsec2 gmu0 [15.63/26.3] Central surface brightness,
g-band
442- 452 F11.8 mag/arcsec2 rmu0 [13.69/25.72] Central surface
brightness, r-band
454- 464 F11.8 mag/arcsec2 imu0 [12.1/25.5] Central surface brightness,
i-band
466- 474 F9.6 mag/arcsec2 gmuSE [23.6/27.1] Mean surface brightness,
g-band, SourceExtractor
476- 484 F9.6 mag/arcsec2 rmuSE [21.74/26.5] Mean surface brightness,
r-band, SourceExtractor
486- 494 F9.6 mag/arcsec2 imuSE [19.4/26.3] Mean surface brightness,
i-band, SourceExtractor
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 19-Apr-2022