Access to Astronomical Catalogues

← Click to display the menu
J/A+A/310/31        The ESO Nearby  Abell Cluster Survey. II. (Mazure+ 1996)

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)
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 RACO≥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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1a 45 142 *Statistical sample of 128 ACO clusters table1b 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
Note on table1a: 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
See also: J/A+A/310/8 : ENACS. Part I. J/A+AS/129/399 : ENACS. Part V. J/A+A/446/19 : ENACS. Part VIII. Byte-by-byte Description of file: table1a table1b
Bytes Format Units Label Explanations
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)=fmain*(C(ACO)+C(bck)), where fmain is the fraction of measured redshifts residing in the main system
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)
Courtesy: Peter Katgert
(End) Patricia Bauer [CDS] 01-Mar-1996
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© Unistra/CNRS