2002ApJ...567..163D

Query : 2002ApJ...567..163D

2002ApJ...567..163D - Astrophys. J., 567, 163-177 (2002/March-1)

Temperature profiles of nearby clusters of galaxies.

DE GRANDI S. and MOLENDI S.

Abstract (from CDS):

We report results from the analysis of 21 nearby galaxy clusters, 11 with cooling flow (CF) and 10 without cooling flow, observed with BeppoSAX. The temperature profiles of both CF and non-CF systems are characterized by an isothermal core extending out to ∼0.2r180; beyond this radius both CF and non-CF cluster profiles rapidly decline. Our results differ from those derived by other authors, who found either continuously declining profiles or substantially flat profiles. Neither the CF nor the non-CF profiles can be modeled by a polytropic temperature profile, the reason being that the radius at which the profiles break is much larger than the core radius characterizing the gas density profiles. For r>0.2r180, where the gas can be treated as a polytrope, the polytropic indexes derived for CF and non-CF systems are respectively 1.20±0.06 and 1.46±0.06. The former index is closer to the isothermal value, 1, and the latter to the adiabatic value, (5)/(3). Published hydrodynamic simulations do not reproduce the peculiar shape of the observed temperature profile, probably suggesting that a fundamental ingredient is missing.

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Journal keyword(s): Galaxies: Cooling Flows - Cosmology: Observations - Galaxies: Clusters: General - Galaxies: Intergalactic Medium - X-Rays: Galaxies

Simbad objects: 26

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Number of rows : 26
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 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
4 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 402 1
5 ACO 3266 ClG 04 31 26.4 -61 25 17           ~ 447 0
6 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
7 ACO 3376 ClG 06 01 25.000 -39 59 51.00           ~ 334 0
8 PKS 0745-19 rG 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 422 1
9 ClG 0745-1910 ClG 07 47 32.4 -19 18 23           ~ 378 0
10 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
11 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
12 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
13 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
14 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
15 ACO 1750 ClG 13 30 50.44 -01 51 27.1           ~ 190 2
16 BAX 202.9000-31.8128 ClG 13 31 28.8 -31 49 40           ~ 88 1
17 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
18 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
19 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
20 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
21 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
22 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
23 ACO 3627 ClG 16 14 22.5 -60 52 07           ~ 340 2
24 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
25 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
26 ACO 2319 ClG 19 21 14.0 +43 56 57           ~ 495 1

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