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J/A+A/310/31 The ESO Nearby Abell Cluster Survey. II. (Mazure+ 1996)
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The ESO Nearby Abell Cluster Survey (ENACS). II. The distribution of velocity
dispersions of rich galaxy clusters.
Mazure A., Katgert P., den Hartog R., Biviano A., Dubath P.,
Escalera E., Focardi P., Gerbal D., Giuricin G., Jones B.,
Le Fevre O., Moles M., Perea J., Rhee G.
<Astron. Astrophys. 310, 31 (1996)>
=1996A&A...310...31M (SIMBAD/NED BibCode)
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ADC_Keywords: Redshifts ; Velocity dispersion ; Clusters, galaxy
Keywords: galaxies: clusters of - galaxies: redshifts -
cosmology: observations - dark matter
Description:
The ESO Nearby Abell Cluster Survey (the ENACS) has yielded 5634
redshifts for galaxies in the directions of 107 rich, Southern
clusters selected from the ACO catalogue (Abell et al. 1989). By
combining these data with another 1000 redshifts from the literature,
of galaxies in 37 clusters, we construct a volume-limited sample of
128 R_ACO_>=1 clusters in a solid angle of 2.55sr centered on the
South Galactic Pole, out to a redshift z=0.1. For a subset of 80 of
these clusters we can calculate a reliable velocity dispersion, based
on at least 10 (but very often between 30 and 150) redshifts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1a.dat 45 142 *Statistical sample of 128 ACO clusters
table1b.dat 45 32 Main systems in the 'cone' with z>0.1 and N>=10
(with relevant secondary systems), and systems
outside the 'cone' with N>=10
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Note on table1a.dat: This is the statistical sample of 128 ACO clusters
that are in the `cone' and have a main system with z < 0.1,
and 14 relevant secondary systems with z < 0.1
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See also:
J/A+A/310/8 : ENACS. Part I.
J/A+AS/129/399 : ENACS. Part V.
Byte-by-byte Description of file: table1a.dat, table1b.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- ACO Abell number of cluster
7 A1 --- n_ACO [ abc] Code (1)
10- 12 I3 --- Ngal Number of galaxies in the system
15- 20 F6.4 --- z Mean redshift of the system (if Nz=0,
the z is photometric estimate)
23- 26 I4 km/s sigma ? Global velocity dispersion corrected for the
effect of 'interlopers'
29- 31 I3 --- C(ACO) ? Background-corrected richness count, from ACO
34- 38 F5.1 --- C(bck) ? Background correction applied by ACO to the
apparent (raw) richness count
41- 45 F5.1 --- C(3D) ? Inferred intrinsic (3D) richness, derived as
C(3d)=f_main_*(C(ACO)+C(bck)), where f_main_
is the fraction of measured redshifts
residing in the main system
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Note (1): a = ESO Nearby Abell Cluster Survey (ENACS) data combined with
literature
b = literature data only (only in table 1a)
c = system inside `cone' with z > 0.1 (only in table 1b)
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Courtesy: Peter Katgert <katgert@strw.LeidenUniv.nl>
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(End) Patricia Bauer [CDS] 01-Mar-1996