2002A&A...391..841E

Query : 2002A&A...391..841E

2002A&A...391..841E - Astronomy and Astrophysics, volume 391841-855 (2002/9-1)

Gravitating mass profiles of nearby galaxy clusters and relations with X-ray gas temperature, luminosity and mass.

ETTORI S., DE GRANDI S. and MOLENDI S.

Abstract (from CDS):

We consider a sample of 22 nearby clusters of galaxies observed with the Medium Energy Concentrator Spectrometer (MECS) on board BeppoSAX . They cover the range in gas temperature between 3 and 10 keV, with bolometric X-ray luminosity between 2x1044erg/s and 6x1045erg/s. Using the de-projected gas temperature and density profiles resolved in a number of bins between 5 and 7 and obtained from this dataset only, we recover the total gravitating mass profiles for 20 objects just applying the (i) spherical symmetry and (ii) hydrostatic equilibrium assumptions. We investigate the correlations between total mass, gas temperature and luminosity at several overdensities values and find that the slopes of these relations are independent of the considered overdensity and consistent with what is predicted from the cluster scaling laws. The best-fit results on the normalization of the M-T relation are slightly lower, but still consistent considering the large errors that we measure, with hydrodynamical simulations. A segregation between relaxed and non-relaxed systems is present in each plane of these relations pointing out a significant component in their intrinsic scatter. This segregation becomes more evident at higher overdensities and when physical quantities, like Mgas and L, that are direct functions of the amount of gas observed, are considered.

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Journal keyword(s): galaxies: cluster: general - galaxies: fundamental parameters - intergalactic medium - X-ray: galaxies - cosmology: observations - dark matter

Simbad objects: 23

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Number of rows : 23
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 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
12 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
13 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
14 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
15 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
16 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
17 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
18 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
19 ACO 3627 ClG 16 14 22.5 -60 52 07           ~ 340 2
20 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
21 BAX 249.5848-64.5165 ClG 16 38 13.2 -64 21 21           ~ 123 0
22 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
23 ACO 2319 ClG 19 21 14.0 +43 56 57           ~ 495 1

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