1999A&A...349...97N


Query : 1999A&A...349...97N

1999A&A...349...97N - Astronomy and Astrophysics, volume 349, 97-107 (1999/9-1)

A multi-wavelength analysis of the cluster of galaxies ABCG 194.

NIKOGOSSYAN E., DURRET F., GERBAL D. and MAGNARD F.

Abstract (from CDS):

We present a morphological and structural analysis of the Richness zero cluster ABCG 194, known as a ``linear cluster''. This study is based on a catalogue of 97 galaxies with B magnitudes and redshifts belonging to the cluster, a ROSAT PSPC image and radio data. We show that the overall large scale structure is rather smooth and comparable at optical and X-ray wavelengths. The cluster is elongated along PA≃50; however it appears as ``linear'' when taking into account only galaxies in the very central part (the axial ratio varies from 0.2 in the central region to 0.8 for a larger region). We have obtained the galaxy density profile and despite the very low X-ray emission the X-ray emitting gas density profile. We have estimated the X-ray gas and dynamical masses up to the limiting radius RL of the PSPC image (respectively 9x1012 and 8x1013M) and the stellar mass up to RL and to 3 Mpc (3x1012 and 7.5x1012M). At smaller scales, the analysis of both positions and velocities reveals the existence of several groups but which are not strongly linked dynamically; however a main structure with a nearly gaussian velocity distribution is exhibited. The velocity dispersion is small (σlos=360km/s). A wavelet analysis of the X-ray image reveals no large scale substructures. Small scale X-ray sources are detected, mainly corresponding to individual galaxies; we give an estimate of their luminosities. The lack of strong substructuring suggests that ABCG 194 is overall a relaxed cluster. ABCG 194 is a poor and cold cluster; we compare how its characteristics fit into various correlations found in the literature, but generally for richer/hotter clusters, such as the σ-TX, LX-TX, LX-σ relations or the ratios of various kinds of masses.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: ABCG 194

Nomenclature: Table 5: [NDG99] A (Nos A-I).

CDS comments: p.98: No. 15 = NGC 530, No. 30 = [CGH88] 0123-0136, No. 54 = [CGH88] 0125-0123.

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ACO 85 ClG 00 41 37.8 -09 20 33           ~ 839 0
2 NGC 530 GiG 01 24 41.6627668992 -01 35 13.578439524   13.96       ~ 47 1
3 [NDG99] I X 01 25 10 -01 35.6           ~ 1 0
4 [LCR98] A 194 26 X 01 25 16.1 -01 31 30           ~ 2 0
5 NGC 538 GiG 01 25 26.0630514912 -01 33 02.232061344   14.58       ~ 44 1
6 [NDG99] H X 01 25 31 -01 37.5           ~ 1 0
7 2MASX J01253596-0125451 GiC 01 25 35.70 -01 25 54.0           ~ 5 0
8 NGC 541 IG 01 25 44.3069825040 -01 22 46.086331044 13.42 13.03 12.08     ~ 200 2
9 Z 385-127 GiG 01 25 47.6977273800 -01 20 40.417969992   15.2       ~ 44 0
10 [NDG99] E X 01 25 57 -01 11.3           ~ 1 0
11 [NDG99] A G 01 26 00 -01 20.9           ~ 3 1
12 NGC 547 GiP 01 26 00.6208982520 -01 20 42.432452268   13.16 13.34     ~ 331 3
13 ACO 194 ClG 01 26 01.3 -01 22 02           ~ 340 2
14 [NDG99] D X 01 26 11 -01 12.1           ~ 1 0
15 [NDG99] G X 01 26 23 -01 38.2           ~ 1 0
16 [NDG99] F * 01 26 43 -01 14.2           ~ 1 0
17 UGC 1043 GiG 01 27 43.0090559568 -01 08 22.508493180   15.1       ~ 32 0
18 NGC 564 GiG 01 27 48.1981156248 -01 52 45.923110932   13.8       ~ 63 0

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2022.05.20-18:55:09

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