2001AJ....121.1266D

Query : 2001AJ....121.1266D

2001AJ....121.1266D - Astron. J., 121, 1266-1274 (2001/March-0)

Galaxy morphological segregation in clusters: local versus global conditions.

DOMINGUEZ M., MURIEL H. and LAMBAS D.G.

Abstract (from CDS):

We study the relative fraction of galaxy morphological types in clusters as a function of the projected local galaxy density and of different global parameters: cluster projected gas density, cluster projected total mass density, and reduced cluster-centric distance. Since local and global densities are correlated, we have considered different tests to search for the parameters on which segregation shows the strongest dependence. We have also explored the results of our analysis as they apply to both the central regions of the clusters and their outskirts. We consider a sample of clusters of galaxies with estimated temperatures and derive the projected mass density profile, using the model of Navarro, Frenk, & White, and the 500 overdensity contrast radius (r500), using the scaling relation. X-ray surface brightness profiles are used to obtain the projected gas density, assuming the hydrostatic equilibrium model. Our results suggest that morphological segregation in clusters is controlled by local galaxy density in the outskirts. On the other hand, global projected mass density shows the strongest correlation with the fractions of morphological types in the central high-density region, with a marginal dependence on local galaxy density.

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Journal keyword(s): Galaxies: Clusters: General - Galaxies: Evolution - Galaxies: Fundamental Parameters - Galaxies: Intergalactic Medium - X-Rays

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 76 ClG 00 40 16.1031 +06 52 46.226           ~ 138 2
2 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
3 ACO 154 ClG 01 10 58.1 +17 39 56           ~ 140 1
4 ACO 194 ClG 01 26 01.3 -01 22 02           ~ 363 2
5 ACO 376 ClG 02 45 48 +36 51.6           B8.5 161 1
6 ACO 400 ClG 02 57 37.4 +06 00 45           ~ 408 3
7 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
8 ACO 539 ClG 05 16 35.1 +06 27 14           ~ 255 2
9 ACO 592 ClG 07 42 31.1486 +09 22 25.893           ~ 62 1
10 ACO 957 ClG 10 14 02.35 -00 53 30.0           ~ 225 2
11 ACO 1142 ClG 11 00 56.74 +10 30 15.2           ~ 157 1
12 ACO 1185 ClG 11 10 32.15 +28 35 50.4           ~ 271 1
13 ACO 1377 ClG 11 47 18.24 +55 43 29.1           ~ 148 1
14 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
15 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
16 ACO 1913 ClG 14 26 43.42 +16 40 26.1           ~ 100 1
17 ACO 1983 ClG 14 52 59.33 +16 46 11.0           ~ 249 1
18 ACO 1991 ClG 14 54 41.53 +18 38 08.4           ~ 349 1
19 ACO 2040 ClG 15 12 44.00 +07 27 34.5           ~ 144 1
20 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
21 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 515 2
22 ACO 2657 ClG 23 44 51.0 +09 08 40           ~ 280 3

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