2007MNRAS.379..518M


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.27CEST08:38:50

2007MNRAS.379..518M - Mon. Not. R. Astron. Soc., 379, 518-534 (2007/August-1)

X-ray and Sunyaev-Zel'dovich scaling relations in galaxy clusters.

MORANDI A., ETTORI S. and MOSCARDINI L.

Abstract (from CDS):

We present an analysis of the scaling relations between X-ray properties and Sunyaev-Zel'dovich (SZ) parameters for a sample of 24 X-ray luminous galaxy clusters observed with Chandra and with measured SZ effect. These objects are in the redshift range 0.14-0.82 and have X-ray bolometric luminosity L ≳ 1045 erg/s, with at least 4000 net counts collected for each source. We perform a spatially resolved spectral analysis and recover the density, temperature T and pressure profiles of the intracluster medium (ICM), just relying on the spherical symmetry of the cluster and the hydrostatic equilibrium hypothesis. The combined analysis of the SZ and X-ray scaling relations is a powerful tool to investigate the physical properties of the clusters and their evolution in redshift, by tracing out their thermodynamical history. We observe that the correlations among X-ray quantities only are in agreement with previous results obtained for samples of high-z X-ray luminous galaxy clusters. On the relations involving SZ quantities, we obtain that they correlate with the gas temperature with a logarithmic slope significantly larger than the predicted value from the self-similar model. The measured scatter indicates, however, that the central Compton parameter y0 is a proxy of the gas temperature at the same level of other X-ray quantities like luminosity. Our results on the X-ray and SZ scaling relations show a tension between the quantities more related to the global energy of the system (e.g. gas temperature, gravitating mass) and the indicators of the structure of the ICM (e.g. gas density profile, central Compton parameter y0). Indeed, by using a robust fitting technique, the most significant deviations from the values of the slope predicted from the self-similar model are measured in the L-T, L -Mtot, Mgas-T, y0-T relations. When the slope is fixed to the self-similar value, these relations consistently show a negative evolution suggesting a scenario in which the ICM at higher redshift has lower both X-ray luminosity and pressure in the central regions than the expectations from self-similar model. These effects are more evident in relaxed clusters in the redshift range 0.14-0.45, where a more defined core is present and the assumed hypotheses on the state of the ICM are more reliable.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): galaxies: clusters: general - cosmic microwave background - cosmology: observations - X-rays: galaxies: clusters

Status at CDS:  

Simbad objects: 24

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Number of rows : 24

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 472 0
2 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 636 0
3 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 328 0
4 ACO 520 ClG 04 54 19.0 +02 56 49           ~ 379 0
5 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 221 0
6 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 401 0
7 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 213 0
8 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 260 0
9 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6       ~ 248 0
10 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 449 0
11 ClG 1137+66 ClG 11 40 23.3 +66 09 01     21.0     ~ 135 0
12 ACO 1413 ClG 11 55 18.0 +23 24 19           ~ 379 0
13 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1017 0
14 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 463 0
15 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 348 0
16 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 620 1
17 ACO 1914 ClG 14 26 01.3 +37 49 36           ~ 272 0
18 ACO 1995 ClG 14 52 55.0 +58 02 59           ~ 118 0
19 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 519 0
20 ACO 2204 ClG 16 32 45.7 +05 34 43           ~ 396 0
21 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 779 1
22 ACO 2261 ClG 17 22 28.3 +32 09 13           ~ 281 0
23 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 624 2
24 1RXS J222834.4+203647 ClG 22 28 37.1 +20 36 31           ~ 102 0

    Equat.    Gal    SGal    Ecl

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2020.05.27-08:38:50

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