1998A&A...339...52L

Query : 1998A&A...339...52L

1998A&A...339...52L - Astronomy and Astrophysics, volume 339, 52-60 (1998/11-1)

On the location of X-ray peaks and dominant galaxies in clusters.

LAZZATI D. and CHINCARINI G.

Abstract (from CDS):

We analyze the structure of the X-ray emission of a sample of 22 Abell clusters of galaxies with a cD in their centre, observed with the ROSAT PSPC. Utilizing the multi-scale power of the Wavelet Transform we detect significant (∼50h–1kpc) offsets between the large scale centroid and the peak of X-ray emission. Despite the uncertainties on the satellite pointing, the X-ray to optical correlation indicates a likely association between the X-ray peak and the dominant galaxy. We develop a model in which the offset is produced by small amplitude oscillations of the cD galaxy around the bottom of the cluster potential well and successfully compare it to the observed distribution of offsets. Within this scenario the offsets are not due to dynamic instabilities and the number of structured clusters is greatly reduced.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: general - galaxies: elliptical and lenticular, cD - X-rays: galaxies

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 - 2024 		#notes
1 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 909 0
2 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 368 1
3 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 698 1
4 ACO 400 ClG 02 57 37.4 +06 00 45           ~ 399 3
5 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 502 0
6 ACO 496 ClG 04 33 38.8 -13 15 59           ~ 694 2
7 ACO 539 ClG 05 16 35.1 +06 27 14           ~ 249 2
8 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 839 1
9 ACO 1651 ClG 12 59 22.43 -04 11 47.1           ~ 290 0
10 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 314 1
11 ACO 1795 ClG 13 48 50.48 +26 35 07.4           ~ 1267 0
12 ACO 1991 ClG 14 54 41.53 +18 38 08.4           ~ 330 1
13 ACO 2029 ClG 15 10 56.2 +05 44 42           ~ 943 0
14 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 730 1
15 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 397 2
16 ACO 2107 ClG 15 39 39.04 +21 46 57.8           ~ 253 0
17 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 768 0
18 ACO 3921 ClG 22 49 59.0 -64 25 48           ~ 150 1
19 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 316 1
20 ACO 2657 ClG 23 44 51.0 +09 08 40           ~ 269 3
21 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 335 3
22 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 380 1

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