J/A+A/596/A14 Group catalogues of the local universe (Saulder+, 2016)
The matter distribution in the local Universe as derived from galaxy
groups in SDSS DR12 and 2MRS.
Saulder C., van Kampen E., Chilingarian I., Mieske S., Zeilinger W.W.
<Astron. Astrophys. 596, A14 (2016)>
=2016A&A...596A..14S 2016A&A...596A..14S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Clusters, galaxy
Keywords: galaxies: clusters: general - galaxies: distances and redshifts -
cosmology: large-scale structure of Universe - galaxies: statistics
Abstract:
Friends-of-friends algorithms are a common tool to detect galaxy
groups and clusters in large survey data. In order to be as precise as
possible, they have to be carefully calibrated using mock catalogues.
We create an accurate and robust description of the matter
distribution in the local Universe using the most up-to-date available
data. This will provide the input for a specific cosmological test
planned as follow-up to this work, and will be useful for general
extragalactic and cosmological research.
We create a set of galaxy group catalogues based on the 2MRS (Huchra
et al., 2012, Cat. J/ApJS/199/26) and SDSS DR12 galaxy samples using a
friends-of-friends based group finder algorithm. The algorithm is
carefully calibrated and optimised on a new set of wide-angle mock
catalogues from the Millennium simulation, in order to provide
accurate total mass estimates of the galaxy groups taking into account
the relevant observational biases in 2MRS and SDSS.
We provide four different catalogues: (i) a 2MRS based group
catalogue; (ii) a SDSS DR12 based group catalogue reaching out to a
redshift z=0.11 with stellar mass estimates for 70% of the galaxies;
(iii) a catalogue providing additional fundamental plane distances for
all groups of the SDSS catalogue that host elliptical galaxies; (iv) a
catalogue of the mass distribution in the local Universe based on a
combination of our 2MRS and SDSS catalogues.
While motivated by a specific cosmological test, three of the four
catalogues that we produced are well suited to act as reference
databases for a variety of extragalactic and cosmological science
cases. Our catalogue of fundamental plane distances for SDSS groups
provides further added value to this paper.
Description:
This set of catalogues contains a 2MRS based group catalogue and a
SDSS based group catalogue with comprehensive data on the group's
parameters and the galaxies used to obtain these catalogues. The 2MRS
group catalogue is the file grlist_2.dat corresponding to Table A.1 in
the paper.
The list of 2MRS galaxies used for this catalogue can be found in the
file galist_2.dat, which corresponds to Table A.6 in the paper.
The SDSS group catalogue is the file grlist_s.dat corresponding to
Table A.2 in the paper.
The list of SDSS galaxies used for this catalogue can be found in the
file galist_s.dat, which corresponds to Table A.7 in the paper. It
also contains fundamental plane distance catalogues based on SDSS
data. They are presented for three different Lambda-CDM cosmologies
(the cosmology of the Millennium simulation with Omega_L=0.75,
Omega_M=0.25, and H0=73, the cosmology based on recent
Planck-observations with Omega_L=0.685, Omega_M=0.315, and H0=67.3,
and a "simple" cosmology with Omega_L=0.7, Omega_M=0.3, and H0=70) and
cover the redshift range of our SDSS group catalogue, but also reach
beyond it for individual galaxies.
The files fpdgrm.dat, fpdgrp.dat, and fpdgrs.dat provide the
fundamental plane distances to all groups hosting early-type galaxies
and correspond to Table A.3 in the paper.
We also provide lists of the group based fundamental plane distances
for all galaxies in these group in the files fpdgam.dat,
fpdgap.dat, and fpdgas.dat corresponding to Table A.4 in the
paper.
All galaxies used in the fundamental plane calibrations, but beyond
the limits of our SDSS group catalogue, have their fundamental plane
distances listed in the files fpdbem.dat, fpdbep.dat, and
fpdbes.dat, which correspond to Table A.5 in the paper.
Additionally, a catalogue of finite infinity regions (for timescape
cosmology) is also available. It was derived from the 2MRS and SDSS
group catalogue for two slightly different approximations for a future
observational test of timescape cosmology.
The finite infinity regions are provided in the files fireg_ba.dat and
fireg_fm.dat corresponding to Table A.8 in the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
grlist_2.dat 168 31506 List of groups and their parameters detected
in 2MRS (Table A.1)
grlist_s.dat 168 229893 List of groups and their parameters detected
in SDSS DR12 (Table A.2)
galist_2.dat 84 43425 List of 2MRS galaxies used, as well as their
IDs and coordinates (Table A.6)
galist_s.dat 84 402439 List of SDSS galaxies used, as well as their
IDs and coordinates (Table A.7)
fpdgrm.dat 188 35849 Fundamental plane distances to groups in SDSS
using the cosmology of the Millennium
simulation (Table A.3)
fpdgrp.dat 188 35849 Fundamental plane distances to groups in SDSS
using the cosmology of the recent Planck
observations (Table A.3)
fpdgrs.dat 188 35849 Fundamental plane distances to groups in SDSS
using a "simple" cosmology (Table A.3)
fpdgam.dat 138 145359 Fundamental plane distances to galaxies in the
group catalogue using the cosmology of the
Millennium simulation (Table A.4)
fpdgap.dat 138 145359 Fundamental plane distances to galaxies in the
group catalogue using the cosmology of the
recent Planck observations (Table A.4)
fpdgas.dat 138 145359 Fundamental plane distances to galaxies in the
group catalogue using a "simple" cosmology
(Table A.4)
fpdbem.dat 118 69668 Fundamental plane distances to galaxies in SDSS
beyond the limits of our group catalogue using
the cosmology of the Millennium simulation
(Table A.5)
fpdbep.dat 118 69683 Fundamental plane distances to galaxies in SDSS
beyond the limits of our group catalogue using
the cosmology of the recent Planck observations
(Table A.5)
fpdbes.dat 118 69679 Fundamental plane distances to galaxies in SDSS
beyond the limits of our group catalogue using
a "simple" cosmology (Table A.5)
fireg_ba.dat 70 171801 List of finite infinity regions from detected
groups (Table A.8)
fireg_fm.dat 70 154406 List of finite infinity regions rescaled to the
full mass of the cosmology (Table A.8)
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See also:
J/A+A/514/A102 : SDSS DR7 groups of galaxies (Tago+, 2010)
J/MNRAS/418/1409 : Compact groups of galaxies in SDSS DR7 (Mendel+, 2011)
J/A+A/540/A106 : SDSS-DR8 groups and clusters of galaxies (Tempel+, 2012)
J/MNRAS/426/296 : Compact Groups of galaxies from 2MASX (Diaz-Gimenez+, 2012)
J/A+A/566/A1 : SDSS galaxies Flux- and volume-limited groups (Tempel+ 2014)
J/A+A/578/A61 : Galaxy groups in the 2M++ (Diaz-Gimenez+, 2015)
J/AJ/149/171 : 2MASS galaxy group catalog (Tully, 2015)
J/A+A/588/A14 : Friends-of-friends galaxy group finder (Tempel+, 2016)
J/A+A/590/A29 : Multi-frequency galaxy group catalogue (Poudel+, 2016)
J/MNRAS/412/2498 : Galaxy groups & clouds in local universe (Makarov+, 2016)
J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012)
http://sdss.org/dr12 : SDSS DR12 Home Page
Byte-by-byte Description of file: grlist_2.dat grlist_s.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- iGrID Internal 2MRS or SDSS group ID
9- 22 F14.8 deg RAdeg Right ascension (J2000.0) of the group centre
23- 36 F14.8 deg DEdeg Declination (J2000.0) of the group centre
37- 46 F10.7 --- z Redshift of the group centre (CMB-corrected)
47- 56 F10.5 [Lsun] logLtot logarithm of the total (extrapolated)
luminosity of the group (1)
57- 66 F10.5 [Lsun] e_logLtot Uncertainty of total luminosity
67- 76 F10.5 [Lsun] logLobs logarithm of the observed luminosity
of the group (1)
77- 86 F10.5 [Msun] logMtot logarithm of the total mass of the group
87- 96 F10.5 [Msun] e_logMtot Uncertainty of the total mass
97-106 F10.5 [Msun] logMstar ?=-99.99 logarithm of the minimal stellar
mass (2)
107-112 I6 --- NMstar Number of galaxies in the group for which
stellar masses are available
113-122 F10.4 [Msun] logMdyn ?=0 logarithm of the dynamical mass of the
group (3)
123-132 F10.4 km/s sigma ?=0 Velocity dispersion of the group (3)
133-142 F10.4 kpc Rad ?=0 Radius of the group (3)
143-152 F10.6 deg angRad ?=0 Angular radius of the group (3)
153-162 F10.4 Mpc DL Luminosity distance to the group
(redshift based)
163-168 I6 --- Ntot Total number of galaxies in the group
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Note (1): Luminosity in Ks band for 2MRS, r band for SDSS groups.
Note (2): If no stellar mass is available for any galaxy in the group, the
value will be set to -99.99.
Note (3): Only available for groups hosting more than one galaxy.
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Byte-by-byte Description of file: galist_2.dat galist_s.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 I8 --- iGalID Internal 2MRS or SDSS galaxy ID
9- 16 I8 --- iGrID Internal 2MRS or SDSS group ID
17- 36 A20 --- Name 2MASS name (HHMMSSss+DDMMSSs) or
DR12 Object ID number
37- 50 F14.8 deg RAdeg Right ascension (J2000.0)
51- 64 F14.8 deg DEdeg Declination (J2000.0)
65- 74 F10.7 --- z Redshift (CMB-corrected)
75- 84 F10.5 [Msun] logMstar ?=-99.99 logarithm of the stellar mass (1)
--------------------------------------------------------------------------------
Note (1): If no stellar mass is available for this galaxy, the value will be
set to -99.99.
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Byte-by-byte Description of file: fpdgrm.dat fpdgrp.dat fpdgrs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 I8 --- iGrID Internal SDSS group ID
9- 22 F14.8 deg RAdeg Right ascension (J2000.0) of the group centre
23- 36 F14.8 deg DEdeg Declination (J2000.0) of the group centre
37- 46 F10.7 --- z Redshift of the group centre (CMB-corrected)
47- 56 F10.7 --- e_z Uncertainty of the group redshift
57- 66 F10.4 Mpc DAfp Angular diameter distance derived from the
fundamental plane
67- 76 F10.4 Mpc e_DAfp Uncertainty of the angular diameter distance
77- 86 F10.4 Mpc DCfp Co-moving distance derived from the
fundamental plane
87- 96 F10.4 Mpc e_DCfp Uncertainty of the co-moving distance
97-106 F10.4 Mpc DLfp Luminosity distance derived from the
fundamental plane
107-116 F10.4 Mpc e_DLfp Uncertainty of the luminosity distance
117-126 F10.4 Mpc DAz Angular diameter distance derived from the
redshift
127-136 F10.4 Mpc e_DAz Uncertainty of the angular diameter distance
137-146 F10.4 Mpc DCz Co-moving distance derived from the redshift
147-156 F10.4 Mpc e_DCz Uncertainty of the co-moving distance
157-166 F10.4 Mpc DLz Luminosity distance derived from the redshift
167-176 F10.4 Mpc e_DLz Uncertainty of the luminosity distance
177-182 I6 --- Netg Number of early-type galaxies in group
183-188 I6 --- Ntot Total number of galaxies in group
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Byte-by-byte Description of file: fpdgam.dat fpdgap.dat fpdgas.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 I8 --- iGalID Internal SDSS galaxy ID
9- 16 I8 --- iGrID Internal SDSS group ID
17- 36 I20 --- ObjID SDSS DR12 Object ID number
37- 50 F14.8 deg RAdeg Right ascension (J2000.0)
51- 64 F14.8 deg DEdeg Declination (J2000.0)
65- 74 F10.7 --- z Group redshift (CMB-corrected)
75- 84 F10.4 Mpc DL Luminosity distance derived from the
fundamental plane
85- 94 F10.4 Mpc e_DL Uncertainty of the Luminosity distance
95-104 F10.4 Mpc DC Co-moving distance derived from the
fundamental plane
105-114 F10.4 Mpc e_DC Uncertainty of the Co-moving distance
115-124 F10.4 Mpc DA Angular diameter distance derived from the
fundamental plane
125-134 F10.4 Mpc e_DA Uncertainty of the Angular diameter distance
135-138 I4 --- etgflag [0/1] flag if early-type galaxy
(1=true, 0=false)
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Byte-by-byte Description of file: fpdbem.dat fpdbep.dat fpdbes.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 20 I20 --- ObjID SDSS DR12 Object ID number
21- 34 F14.8 deg RAdeg Right ascension (J2000.0)
35- 48 F14.8 deg DEdeg Declination (J2000.0)
49- 58 F10.7 --- z Redshift (CMB-corrected)
59- 68 F10.4 Mpc DL Luminosity distance derived from the
fundamental plane
69- 78 F10.4 Mpc e_DL Uncertainty of the luminosity distance
79- 88 F10.4 Mpc DC Co-moving distance derived from the
fundamental plane
89- 98 F10.4 Mpc e_DC Uncertainty of the co-moving distance
99-108 F10.4 Mpc DA Angular diameter distance derived from the
fundamental plane
109-118 F10.4 Mpc e_DA Uncertainty of the angular diameter
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Byte-by-byte Description of file: fireg_ba.dat fireg_fm.dat
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Bytes Format Units Label Explanations
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1- 10 F10.3 Mpc Xpos x-coordinate of the centre of a finite
infinity region
11- 20 F10.3 Mpc Ypos y-coordinate of the centre of a finite
infinity region
21- 30 F10.3 Mpc Zpos z-coordinate of the centre of a finite
infinity region
31- 40 F10.5 [Msun] logM logarithm of the mass within the finite
infinity region
41- 50 F10.5 [Msun] e_logM Uncertainty of the mass estimate
51- 60 F10.5 Mpc Rad Radius of the finite infinity region
61- 70 F10.5 Mpc e_Rad Uncertainty of the radius of the finite
infinity region
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Acknowledgements:
Christoph Saulder, christoph.saulder(at)equinoxomega.net
(End) C. Saulder [University of Vienna, Austria], P. Vannier [CDS] 05-Aug-2016