J/ApJS/265/7 Void catalogs from SDSS DR7 (Douglass+, 2023)
Updated void catalogs of the SDSS DR7 main sample.
Douglass K.A., Veyrat D., BenZvi S.
<Astrophys. J. Suppl. Ser., 265, 7 (2023)>
=2023ApJS..265....7D 2023ApJS..265....7D
ADC_Keywords: Intergalactic medium; Spectra, optical
Keywords: Voids ; Cosmic web ; Galaxy physics ;
Large-scale structure of the universe ; Galaxy environments ;
Extragalactic astronomy ; Sky surveys ; Catalogues
Abstract:
We produce several public void catalogs using a volume-limited
subsample of the Sloan Digital Sky Survey Data Release 7 (SDSS DR7).
Using new implementations of three different void-finding algorithms,
VoidFinder and two ZOBOV-based algorithms (VIDE and REVOLVER), we
identify 1163, 531, and 518 cosmic voids with radii >10h-1Mpc,
respectively, out to a redshift of z=0.114 assuming a Planck 2018
cosmology, and 1184, 535, and 519 cosmic voids assuming a WMAP5
cosmology. We compute effective radii and centers for all voids and
find none with an effective radius >54h-1Mpc. The median void
effective radius is 15-19h-1Mpc for all three algorithms. We extract
and discuss several properties of the void populations, including
radial density profiles, the volume fraction of the catalog contained
within voids, and the fraction of galaxies contained within voids.
Using 64 mock galaxy catalogs created from the Horizon Run 4 N-body
simulation, we compare simulated and observed void properties and find
good agreement between the SDSS DR7 and mock catalog results.
Description:
Released in 2009, the SDSS DR7 (Abazajian et al. 2009) is a wide-field
multiband imaging and spectroscopic survey conducted on the 2.5 m
telescope at the Apache Point Observatory in New Mexico. Follow-up
spectroscopy was performed on all galaxies with a Petrosian r-band
magnitude mr<17.77 with two double fiber-fed spectrometers and fiber
plug plates with a minimum fiber separation of 55". The observed
wavelength range for the SDSS DR7 spectra is 3800-9200Å with a
resolution R∼1800.
We use version 1.0.1 of the NSA (Blanton+ 2011AJ....142...31B 2011AJ....142...31B), which
contains 641,409 galaxies observed in SDSS DR7. See Section 2.
We present void catalogs found with VoidFinder, V2 with VIDE pruning
(V2/VIDE), and V2 with REVOLVER pruning (V2/REVOLVER) assuming two
flat ΛCDM cosmologies: WMAP5 (ΩM=0.258;
Dunkley+ 2009ApJS..180..306D 2009ApJS..180..306D) and Planck 2018 (ΩM=0.315;
Planck Collaboration+ 2020A&A...641A...6P 2020A&A...641A...6P), and assuming
H0=100h.km.s-1Mpc-1. See Section 4.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 181 2347 VoidFinder output: Maximal spheres for two cosmologies
table2.dat 105 80080 VoidFinder output: All spheres for two cosmologies
table3.dat 417 2101 V2 output: Voids for two prunings and two cosmologies
table4.dat 32 4146 V2 output: Zones for two prunings and two cosmologies
table5.dat 38 776500 V2 output: Galaxies for two prunings and two cosmologies
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
J/MNRAS/269/301 : Superclusters and voids (Einasto+, 1994)
J/AJ/119/32 : Survey of galaxies within nearby voids. II (Grogin+, 2000)
J/ApJ/744/82 : Catalog of cosmic voids from the SDSS-DR7 (Varela+, 2012)
J/A+A/570/A106 : VIPERS. Searching for cosmic voids (Micheletti+, 2014)
J/MNRAS/440/1248 : SDSS DR7 voids and superclusters (Nadathur+, 2014)
J/ApJ/799/95 : Structure in 3D galaxy distribution. II. Voids (Way+, 2015)
J/ApJ/834/186 : Metallicity of MPA-JHU SDSS-DR7 dwarf gal. (Douglass+, 2017)
J/ApJ/835/161 : A cosmic void cat. of SDSS DR12 BOSS galaxies (Mao+, 2017)
J/ApJ/837/42 : N/O ratio of dwarf galaxies from SDSS (Douglass+, 2017)
J/ApJ/864/144 : N/O and Ne/O ratios of SDSS dwarf galaxies (Douglass+, 2018)
J/ApJ/861/60 : z∼2.3 cosmic voids in the COSMOS field (Krolewski+, 2018)
J/MNRAS/482/4329 : Void galaxies in the nearby Universe (Pustilnik+, 2019)
J/MNRAS/502/4815 : Very young galaxies in the local Universe (Trevisan+, 2021)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Cosmo Cosmology, Plank 2018 or WMAP5 (G1)
12- 31 F20.15 h-1.Mpc x [-324.3/-13.9] Cartesian, x coordinate, of
maximal sphere
33- 54 F22.17 h-1.Mpc y [-292.1/266.6] Cartesian, y coordinate, of
maximal sphere
56- 76 F21.17 h-1.Mpc z [-10/294.8] Cartesian, z coordinate, of
maximal sphere
78- 95 F18.15 h-1.Mpc Rad [10/22.6] Radius of maximal sphere
97- 100 I4 --- void [0/1183]? Unique sequential identifier for that
cosmology
102 I1 --- edge [0/2] Flag identifying whether any part of the
void falls outside of the survey mask
104- 122 F19.15 h-1.Mpc s [27.37/327.5] Comoving distance of maximal
sphere center
124- 141 F18.14 deg RAdeg [112.2/259.1] Right Ascension of maximal
sphere center (J2000)
143- 162 F20.17 deg DEdeg [-2.1/67] Declination of maximal sphere center
(J2000)
164- 181 F18.15 h-1.Mpc Reff [10.17/30.74] Effective radius of the void to
which the maximal sphere belongs
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Cosmo Cosmology, Plank 2018 or WMAP5 (G1)
12- 31 F20.15 h-1.Mpc x [-328.4/-13.9] Cartesian, x coordinate, of sphere
33- 57 F25.20 h-1.Mpc y [-295.2/271.5] Cartesian, y coordinate, of sphere
59- 80 F22.18 h-1.Mpc z [-15.1/300.1] Cartesian, z coordinate, of sphere
82-100 F19.16 h-1.Mpc Rad [3.64/22.6] Radius of sphere
102-105 I4 --- void [0/1183]? Unique sequential identifier of the
void for that cosmology (1)
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Note (1): The union of all spheres with the same unique identifier form
one void.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Cosmo Cosmology, Plank 2018 or WMAP5 (G1)
12- 19 A8 --- Prune Pruning, VIDE or REVOLVER
21- 40 F20.15 h-1.Mpc x [-320.2/-29.9] Cartesian, x coordinate, of
void's weighted center
42- 63 F22.17 h-1.Mpc y [-279/267] Cartesian, y coordinate, of void's
weighted center
65- 85 F21.17 h-1.Mpc Z [-7/286.5] Cartesian, z coordinate, of void's
weighted center
87- 106 F20.18 --- z [0.014/0.11] Redshift of the void's weighted
center
108- 125 F18.14 deg RAdeg [113.7/257.6] Right Ascension of void's
weighted center (J2000)
127- 146 F20.17 deg DEdeg [-1.3/66.7] Declination of void's weighted
center (J2000)
148- 165 F18.15 h-1.Mpc Reff [10/53.3] Effective radius of the void
167- 186 F20.16 h-1.Mpc x1 [-19.3/25.1] Cartesian, x coordinate, of
void's first ellipsoid axis
188- 210 F23.19 h-1.Mpc y1 [-19.7/14.5] Cartesian, y coordinate, of
void's first ellipsoid axis
212- 234 F23.19 h-1.Mpc z1 [-14.3/18.3] Cartesian, z coordinate, of
void's first ellipsoid axis
236- 256 F21.17 h-1.Mpc x2 [-71/59.2] Cartesian, x coordinate, of void's
second ellipsoid axis
258- 280 F23.19 h-1.Mpc y2 [-48.8/64.1] Cartesian, y coordinate, of
void's second ellipsoid axis
282- 302 F21.17 h-1.Mpc z2 [-54/50.1] Cartesian, z coordinate, of void's
second ellipsoid axis
304- 326 F23.19 h-1.Mpc x3 [-34.8/46.2] Cartesian, x coordinate, of
void's third ellipsoid axis
328- 349 F22.18 h-1.Mpc y3 [-67.2/56] Cartesian, y coordinate, of void's
third ellipsoid axis
351- 371 F21.17 h-1.Mpc z3 [-25.5/72.5] Cartesian, z coordinate, of
void's third ellipsoid axis
373- 392 F20.13 h-2.Mpc2 area [2447/174107] Total surface area of the void
394- 417 F24.18 h-2.Mpc2 edge [0/17639] Surface area of the void which is
adjacent to boundary cells
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cosmo Cosmology, Plank 2018 or WMAP5 (G1)
12- 19 A8 --- Prune Pruning, VIDE or REVOLVER
21- 24 I4 --- zone [0/1036] Unique zone identifier for a given
cosmology and pruning
26- 28 I3 --- void0 [0/723]?=-1 Unique identifier of the smallest void
to which the zone belongs
30- 32 I3 --- void1 [0/723]?=-1 Unique identifier of the largest void
to which the zone belongs
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Cosmo Cosmology, Plank 2018 or WMAP5 (G1)
12- 19 A8 --- Prune Pruning, VIDE or REVOLVER
21- 26 I6 --- NSAID [5/641389] Galaxy NSA v1.0.1 identifier
28- 31 I4 --- zone [0/1036] Unique identifier for the zone to
which the galaxy belongs
33- 34 I2 --- depth [0/13] Number of adjacent Voronoi cells (1)
36- 36 I1 --- edge [0/1] Boolean, is galaxy at the edge of the
survey mask
38- 38 I1 --- out [0] Boolean, is galaxy outside the survey mask
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Note (1): Number of adjacent Voronoi cells between the galaxy's Voronoi cell
and the edge of the zone to which it belongs.
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Global notes:
Note (G1):
We present void catalogs found with VoidFinder, V2 with VIDE pruning
(V2/VIDE), and V2 with REVOLVER pruning (V2/REVOLVER) assuming two
flat ΛCDM cosmologies: WMAP5 (ΩM=0.258;
Dunkley+ 2009ApJS..180..306D 2009ApJS..180..306D) and Planck 2018 (ΩM=0.315;
Planck Collaboration+ 2020A&A...641A...6P 2020A&A...641A...6P), and assuming
H0=100h.km.s-1Mpc-1. See Section 4.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 14-Apr-2023