2000ApJ...536..144A

Query : 2000ApJ...536..144A

2000ApJ...536..144A - Astrophys. J., 536, 144-152 (2000/June-2)

On the internal absorption of galaxy clusters.

ARABADJIS J.S. and BREGMAN J.N.

Abstract (from CDS):

A study of the cores of galaxy clusters with the Einstein Solid State Spectrometer (SSS) indicated the presence of absorbing material corresponding to 1012 M☉ of cold cluster gas, possibly resulting from cooling flows. Since this amount of cold gas is not confirmed by observations at other wavelengths, we examined whether this excess absorption is present in the ROSAT PSPC observations of 20 bright galaxy clusters. For (3)/(4) of the clusters, successful spectral fits were obtained with absorption due only to the Galaxy, and therefore no extra absorption is needed within the clusters, in disagreement with the results from the Einstein SSS data for some of the same clusters. For (1)/(4) of the clusters, none of our spectral fits was acceptable, suggesting a more complicated cluster medium than the two-temperature and cooling-flow models considered here. However, even for these clusters, substantial excess absorption is not indicated.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Cooling Flows - Galaxies: Clusters: General - Galaxies: Intergalactic Medium - 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 - 2026 		#notes
1 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
2 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
3 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 391 1
4 ACO 401 ClG 02 58 50.3 +13 34 07           ~ 592 0
5 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 402 1
6 ACO 478 ClG 04 13 24.8 +10 27 52           ~ 522 0
7 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
8 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
9 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
10 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
11 ACO 1651 ClG 12 59 27.3 -04 10 49           ~ 307 0
12 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
13 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
14 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
15 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 756 1
16 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
17 ACO 2147 ClG 16 02 11.96 +15 55 11.5           ~ 416 0
18 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
19 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
20 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
21 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0
22 ACO 2657 ClG 23 44 51.0 +09 08 40           ~ 280 3

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