J/MNRAS/445/4073 Two catalogues of superclusters (Chow-Martinez+, 2014)
Two new catalogues of superclusters of Abell/ACO galaxy clusters out to
redshift 0.15.
Chow-Martinez M., Andernach H., Caretta C.A., Trejo-Alonso J.J.
<Mon. Not. R. Astron. Soc., 445, 4073-4085 (2014)>
=2014MNRAS.445.4073C 2014MNRAS.445.4073C
ADC_Keywords: Clusters, galaxy ; Redshifts
Keywords: astronomical data bases: miscellaneous - catalogues -
galaxies: clusters: general - cosmology: observations -
large-scale structure of Universe
Abstract:
We present two new catalogues of superclusters of galaxies out to a
redshift of z=0.15, based on the Abell/ACO cluster redshift
compilation maintained by one of us (HA). The first of these
catalogues, the all-sky Main SuperCluster Catalogue (MSCC), is based
on only the rich (A-) Abell clusters, and the second one, the Southern
SuperCluster Catalogue (SSCC), covers declinations δ←17°
and includes the supplementary Abell S-clusters. A tunable
Friends-of-Friends algorithm was used to account for the cluster
density decreasing with redshift and for different selection functions
in distinct areas of the sky. We present the full list of Abell
clusters used, together with their redshifts and supercluster
memberships and including the isolated clusters. The SSCC contains
about twice the number of superclusters than MSCC for
δ←17°, which we found to be due to (1) new superclusters
formed by A-clusters in their cores and surrounded by S-clusters
(50%), (2) new superclusters formed by S-clusters only (40%), (3)
redistribution of member clusters by fragmentation of rich
(multiplicity m>15) superclusters (8%), and (4) new superclusters
formed by the connection of A-clusters through bridges of S-clusters
(2%). Power-law fits to the cumulative supercluster multiplicity
function yield slopes of α=-2.0 and α=-1.9 for MSCC and
SSCC, respectively. This power-law behaviour is in agreement with the
findings for other observational samples of superclusters, but not
with that of catalogues based on cosmological simulations.
Description:
The current compilation includes all 4076 A- and 1174 S-clusters. For
1011 of the A-clusters, we list a total of 2511 line-of-sight
components, resulting in altogether 5576 clusters/components, while
230 S-clusters are split into 551 components, resulting in a total of
1495 S-clusters/components. From these we selected the ones with
redshift below 0.15 as the basis for our search for superclusters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cat.dat 27 4578 Input catalogue of clusters for MSCC and SSCC
mscc.dat 324 601 The Main SuperCluster Catalogue (MSCC) catalog
sscc.dat 311 423 The Southern SuperCluster Catalogue (SSCC) catalog
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See also:
J/AJ/122/2222 : Superclusters of Abell and X-ray clusters (Einasto+, 2001)
Byte-by-byte Description of file: cat.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- ACO Identification of ACO cluster (ANNNN or SNNNN)
6 A1 --- m_ACO [A-GNSWe] Line-of-sight component of cluster;
"e" insdicates cluster with estimated redshift
8- 13 F6.4 --- z [0.004/0.15] Mean redshift of the cluster
16- 18 I3 --- MSCC [0/601]? Membership in MSCC (2)
20- 22 I3 --- SSCC [0/423]? Membership in SSCC (2)
25- 26 I2 % fSp [0/99]? Percentage of spectroscopic members (1)
27 A1 --- u_fSp [?] Uncertainty flag on perc
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Note (1): percentage of galaxies with redshift in the line of sight (l-o-s)
component as compared to all spectroscopic members in the direction of
the respective A or S cluster; when the number of spectroscopic
members in any of the l-o-s components is unknown, a ? sign is given
Note (2): the value "0" indicates an isolated cluster.
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Byte-by-byte Description of file: mscc.dat sscc.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/601] Identification number within the catalog
(MSCC NNN or SSCC NNN)
4 A1 --- f_Seq [c] c: a supercluster candidate
6- 21 A16 --- SCLs Matching superclusters from Einasto et al, 2001
(J/AJ/122/2222), <SCl NNN> in Simbad
24- 25 I2 --- Nm [2/42] Number of member clusters in supercluster
27- 32 F6.2 deg RAdeg Supercluster center right ascension (J2000)
34- 39 F6.2 deg DEdeg Supercluster center declination (J2000)
41- 45 F5.3 --- z [0.01/0.15] Mean redshift of the supercluster
47- 51 F5.1 Mpc dmax Maximum separation of member cluster pair
(in units of h70-1Mpc)
53-324 A272 --- memCl Comma-separated list of member clusters
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 28-May-2015