J/AJ/149/171 2MASS galaxy group catalog (Tully, 2015)
Galaxy groups: a 2MASS catalog.
Tully R.B.
<Astron. J., 149, 171 (2015)>
=2015AJ....149..171T 2015AJ....149..171T
ADC_Keywords: Clusters, galaxy ; Galaxy catalogs ; Space velocities ;
Photometry, infrared ; Velocity dispersion ; Morphology ;
Cross identifications
Keywords: dark matter - galaxies: clusters: general -
galaxies: luminosity function, mass function -
large-scale structure of universe
Abstract:
A galaxy group catalog is built from the sample of the 2MASS Redshift
Survey almost complete to Ks=11.75 over 91% of the sky. Constraints
in the construction of the groups were provided by scaling relations
determined by close examination of well defined groups with masses
between 1011 and 1015M☉. Group masses inferred from Ks
luminosities are statistically in agreement with masses calculated
from application of the virial theorem. While groups have been
identified over the full redshift range of the sample, the properties
of the nearest and farthest groups are uncertain and subsequent
analysis has only considered groups with velocities between 3000 and
10000km/s. The 24044 galaxies in this range are identified with 13607
entities, 3461 of them with two or more members. A group mass function
is constructed. The Sheth-Tormen formalism provides a good fit to the
shape of the mass function for group masses above
6h-1x1012M☉ but the count normalization is poor. Summing all
the mass associated with the galaxy groups between 3000 and 10000km/s
gives a density of collapsed matter as a fraction of the critical
density of Ωcollapsed=0.16.
Description:
A galaxy group catalog is built from the sample of the 2MASS Redshift
Survey almost complete to Ks=11.75 (Huchra et al. 2012, cat.
J/ApJS/199/26) over 91% of the sky. The final affiliations of galaxies
are called "nests."
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 90 25474 Nest properties
table4.dat 69 43038 Nest members
table5.dat 269 43038 Combined Catalog
--------------------------------------------------------------------------------
See also:
VII/237 : HYPERLEDA. I. Catalog of galaxies (Paturel+, 2003)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
VII/155 : Third Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991)
VII/84 : Groups of Galaxies. III. The CfA Survey (Geller+ 1983)
VII/86 : Groups of Galaxies. I. Nearby Groups (Huchra+ 1982)
J/AJ/146/86 : Cosmicflows-2 catalog (Tully+, 2013)
J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012)
J/MNRAS/412/2498 : Galaxy groups and clouds in local universe (Makarov+, 2011)
J/MNRAS/416/2840 : The 2M++ galaxy redshift catalogue (Lavaux+, 2011)
J/ApJ/676/184 : Peculiar motion away from the Local Void (Tully+, 2008)
J/ApJ/655/790 : Groups of galaxies in 2MASS survey (Crook+, 2007)
J/MNRAS/348/866 : 2dFGRS Percolation-Inferred Galaxy Group (Eke+, 2004)
J/AJ/123/2976 : The UZC-SSRS2 group catalog (Ramella+, 2002)
http://edd.ifa.hawaii.edu/ : The Extragalactic Distance Database (EDD)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- f_Nest Hemisphere (1=in north galactic hemisphere,
2=in south, 12 or 22 if the group is a split
from an adjacent larger group)
4- 9 I6 --- Nest [100001/220041] Group (nest) identification
number (G1)
11- 13 I3 --- Nmb [1/197] Number of members from the 2MASS 11.75
catalog (Huchra et al. 2012, cat. J/ApJS/199/26)
15- 21 I7 --- PGC1 [5/5061293] Number in Principal Galaxies Catalog
for brightest member in group
23- 30 F8.4 deg SGLON Group supergalactic longitude, luminosity weighted
32- 39 F8.4 deg SGLAT Group supergalactic latitude, luminosity weighted
41- 45 F5.2 [Lsun] logLK [4.5/14.32] Log Ks band luminosity (G2)
47- 51 I5 km/s <Vcmba> [7/23996] Unweighted average adjusted CMB
reference frame group velocity (G3)
53- 57 F5.2 mag DM [19.23/36.9] Distance Modulus (G4)
59- 62 I4 km/s sigV [0/3403] Line Of Sight (LOS) bi-weight velocity
dispersion of group members σV (1)
64- 68 F5.3 Mpc R2t [0/5.225] Projected radius of second
turnaround R2t (G5)
70- 73 I4 km/s sigP [1/2566] Line Of Sight (LOS) velocity dispersion
σp (G6)
75- 83 E9.3 Msun Mlum Group mass calculated from luminosity (2)
85- 90 F6.2 --- CF [1/173.24] Conversion factor (G7)
--------------------------------------------------------------------------------
Note (1): Requires at least 5 group members.
Note (2): Adjusted by correction factor, and assumed light to mass conversion
factor (CF).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- f_Nest Hemisphere (1=in north galactic hemisphere,
2=in south, 12 or 22 if the group is a split
from an adjacent larger group)
4- 9 I6 --- Nest [100001/220041] Group (nest) identification
number (G1)
11- 17 I7 --- PGC [2/5061296] Number in Principal Galaxies Catalog
for group member
19- 26 F8.4 deg SGLON Supergalactic longitude of galaxy
28- 35 F8.4 deg SGLAT Supergalactic latitude of galaxy
37- 40 F4.1 --- Mt [-5/10]?=99 Morphological type in the numeric code
of de Vaucouleurs et al. 1991 (cat. VII/155)
42- 46 F5.2 mag Kmag [3.8/11.8] 2MASS Ks-band total magnitude,
extinction corrected
48- 52 F5.2 mag J-H 2MASS (J-H) total extinction corrected color index
54- 57 F4.2 mag J-K 2MASS (J-K) total extinction corrected color index
59- 63 F5.2 [Lsun] logLKi [4.48/12.03] Log intrinsic Ks-band luminosity (G8)
65- 69 I5 km/s Vcmba [7/23996] Adjusted CMB reference frame velocity of
galaxy (G3)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 I7 --- PGC [2/5061296] Number in Principal Galaxies
Catalog (1)
9- 16 F8.4 deg GLON Galaxy Galactic longitude
18- 25 F8.4 deg GLAT Galaxy Galactic latitude
27- 34 F8.4 deg SGLON Galaxy Supergalactic longitude
36- 43 F8.4 deg SGLAT Galaxy Supergalactic latitude
45- 48 F4.1 --- MType [-5/99] Morphological type in the numeric
code of de Vaucouleurs et al. 1991
(cat. VII/155)
50- 54 I5 km/s HV [-282/67860] Galaxy heliocentric velocity
56- 60 I5 km/s Vls [-373/67787] Galaxy velocity in local sheet
reference frame (2)
62- 66 I5 km/s Vcmba [7/23996] Adjusted CMB reference frame
velocity of galaxy (G3)
68- 72 F5.2 mag J-H 2MASS galaxy (J-H) total extinction corrected
color index
74- 77 F4.2 mag J-K 2MASS galaxy (J-K) total extinction corrected
color index
79- 83 F5.2 mag Kmag [3.8/11.75] 2MASS galaxy Ks-band total
magnitude, extinction corected
85- 89 F5.2 [Lsun] logLKi [4.48/12.03] Log intrinsic Ks-band
luminosity (G8)
91- 95 F5.2 [Lsun/Mpc3] logpK [8/12]? Log luminosity density
(logρK) (3)
97- 98 I2 --- f_Nest ? Hemisphere (1=in north galactic hemisphere,
2=in south, 12 or 22 if the group is a
split from an adjacent larger group)
100-105 I6 --- Nest [0/220041] Group (nest) identification
number (G1)
107-109 I3 --- Nmb [1/197] Number of members from 2MASS 11.75
catalog (Huchra et al. 2012,
cat. J/ApJS/199/26)
111-117 I7 --- PGC1 [5/5061293] Principal Galaxies Catalog number
for brightest member in group
119-123 F5.1 Mpc Dist [0.1/240] Distance (G4)
125-129 F5.2 mag DM [19.23/36.9] Distance Modulus (G4)
131-138 F8.4 --- GSGLON Group Supergalactic longitude, luminosity
weighted
140-147 F8.4 --- GSGLAT Group Supergalactic latitude, luminosity
weighted
149-153 F5.2 [Lsun] logLK [4.5/14.32] Log Ks-band group luminosity (G2)
155-160 F6.2 --- CF [1/173.24] Conversion factor (G7)
162-165 I4 km/s sigP [0/2566] Line of sight velocity dispersion
σp (G6)
167-171 F5.3 Mpc R2t [0/5.225] Projected radius of second
turnaround (G5)
173-177 I5 km/s <Vcmba> [7/23996] Unweighted average adjusted CMB
reference frame group velocity (G3)
179-183 I5 km/s Vbw [686/22323]? Bi-weight group velocity (Beers
et al., 1990AJ....100...32B 1990AJ....100...32B; requires at
least 5 group members) (G3)
185-188 I4 km/s e_Vbw ? Uncertainty in Vbw
190-193 I4 km/s sigbw [6/2440]? Group line of sight bi-weight
velocity dispersion (requires at least 5
group members)
195-198 I4 km/s sigV [0/3403] Group line of sight velocity
dispersion (null if group of one)
200-204 F5.3 Mpc Rbw [0/6.63]? Bi-weight projected gravitational
radius (requires at least 5 group members)
206-210 F5.3 Mpc e_Rbw ? Uncertainty in Rbw
212-220 F9.3 TMsun Mvir [0/30900]? Group mass from virial theorem (4)
222-230 F9.3 TMsun Mlum [0/25301] Group mass based on adjusted
intrinsic luminosity & mass to light
prescription
232-235 I4 --- HDC [0/1538] Identification of high density group
in Crook et al. 2007 (cat. J/ApJ/655/790)
237-240 I4 --- LDC [0/1258] Identification of low density group
in Crook et al. 2007 (cat. J/ApJ/655/790)
242-245 I4 --- 2M++ [0/4715] Group identification in Lavaux &
Hudson 2011 (cat. J/MNRAS/416/2840)
247-253 F7.2 Mpc SGX ? SuperGalactic X coordinate (5)
255-261 F7.2 Mpc SGY ? SuperGalactic Y coordinate (5)
263-269 F7.2 Mpc SGZ ? SuperGalactic Z coordinate (5)
--------------------------------------------------------------------------------
Note (1): All Galaxies with Group Tags. Also available (separated into Galactic
north and south halves) at the Extragalactic Distance Database
(http://edd.ifa.hawaii.edu/) with updates.
Note (2): Frame defined by Tully et al. 2008 (cat. J/ApJ/676/184).
Note (3): At nearest location on a 1h-1Mpc grid, where contributions come from
all adjacent 2MASS 11.75 (Huchra et al. 2012, cat. J/ApJS/199/26) galaxies
after smoothing with a Gaussian of 1h-1Mpc times an adjustment dependent
on the luminosity correction factor as described in the text.
Note (4): With bi-weight dispersion and radius parameters. Requires at least 5
group members.
Note (5): From group velocities assuming H0=100km/s/Mpc, with small
adjustments described in section 4.1 to create roughly spherical clusters.
--------------------------------------------------------------------------------
Global Notes:
Note (G1): Our final affiliations of galaxies are called "nests." Please refer
to Section 4 in the paper for details about the construction of the group
catalog.
Note (G2): Summed over all 2MASS 11.75 (Huchra et al. 2012, cat. J/ApJS/199/26)
members and adjusted by the correction factor for missing light.
Note (G3): In the cosmic microwave background (CMB) frame adjusted by a
cosmological model as described in Tully et al. 2013 (cat. J/AJ/146/86).
Note (G4): From group velocity assuming H0=100km/s/Mpc.
Note (G5): Calculated from group luminosity and assumed conversion to mass,
at group distance given by velocity and H0=100 km/s/Mpc.
Note (G6): Anticipated from group luminosity and assumed conversion to mass.
Note (G7): For missing light as a function of systemic velocity.
Note (G8): Extinction corrected, at group distance given by velocity and
H0=100km/s/Mpc.
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 29-May-2015