2010A&A...517A..92A


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.16CEST19:05:34

2010A&A...517A..92A - Astronomy and Astrophysics, volume 517, A92-92 (2010/7-1)

The universal galaxy cluster pressure profile from a representative sample of nearby systems (REXCESS) and the YSZ - M500 relation.

ARNAUD M., PRATT G.W., PIFFARETTI R., BOEHRINGER H., CROSTON J.H. and POINTECOUTEAU E.

Abstract (from CDS):

We investigate the regularity of cluster pressure profiles with REXCESS, a representative sample of 33 local (z<0.2) clusters drawn from the REFLEX catalogue and observed with XMM-Newton. The sample spans a mass range of 1014M<M500<1015M, where M500 is the mass corresponding to a density contrast of 500. We derive an average profile from observations scaled by mass and redshift according to the standard self-similar model, and find that the dispersion about the mean is remarkably low, at less than 30 per cent beyond 0.2R500, but increases towards the center. Deviations about the mean are related to both the mass and the thermo-dynamical state of the cluster. Morphologically disturbed systems have systematically shallower profiles while cooling core systems are more concentrated. The scaled profiles exhibit a residual mass dependence with a slope of ∼0.12, consistent with that expected from the empirically-derived slope of the M500-YX relation; however, the departure from standard scaling decreases with radius and is consistent with zero at R500. The scatter in the core and departure from self-similar mass scaling is smaller compared to that of the entropy profiles, showing that the pressure is the quantity least affected by dynamical history and non-gravitational physics. Comparison with scaled data from several state of the art numerical simulations shows good agreement outside the core. Combining the observational data in the radial range [0.03-1]R500 with simulation data in the radial range [1-4]R500, we derive a robust measure of the universal pressure profile, that, in an analytical form, defines the physical pressure profile of clusters as a function of mass and redshift up to the cluster ``boundary''. Using this profile and direct spherical integration of the observed pressure profiles, we estimate the integrated Compton parameter Y and investigate its scaling with M500 and LX, the soft band X-ray luminosity. We consider both the spherically integrated quantity, Ysph(R), proportional to the gas thermal energy, and the cylindrically integrated quantity, Ycyl(R)=YSZDA2, which is directly related to the Sunyaev-Zel'dovich (SZ) effect signal. From the low scatter of the observed Ysph(R500)-YX relation we show that variations in pressure profile shape do not introduce extra scatter into the Ysph(R500)-M500 relation as compared to that from the YX-M500 relation. The Ysph(R500)-M500 and Ysph(R500)-LX relations derived from the data are in excellent agreement with those expected from the universal profile. This profile is used to derive the expected YSZ-M500 and YSZ-LX relations for any aperture.

Abstract Copyright:

Journal keyword(s): cosmology: observations - dark matter - galaxies: clusters: general - intergalactic medium - X-rays: galaxies: clusters

Simbad objects: 39

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Number of rows : 39

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 ACO 2700 ClG 00 03 49.7 +02 03 59           ~ 79 0
2 ACO 2721 ClG 00 06 14.5 -34 42 51           ~ 86 0
3 ACO 22 ClG 00 20 34.8 -25 41 51           ~ 96 0
4 ACO S 84 ClG 00 49 23.2 -29 31 33           ~ 76 0
5 ACO 133 ClG 01 02 39.0 -21 57 15           ~ 336 1
6 SPT-CL J0145-5301 CGG 01 45 03.60 -53 01 23.4           ~ 40 0
7 ACO 2984 ClG 02 11 27 -40 16.9           ~ 47 0
8 BAX 036.2925-29.4731 ClG 02 25 08.6 -29 28 34           ~ 30 0
9 ACO S 384 ClG 03 45 45.0 -41 10 42           ~ 33 0
10 ACO 3364 ClG 05 47 36.1753 -31 52 22.695           ~ 64 0
11 ACO 3378 ClG 06 05 52.6923 -35 18 32.801           ~ 71 1
12 RXC J0616.8-4748 ClG 06 16 56.8320 -47 47 26.473           ~ 27 0
13 ACO 3404 ClG 06 45 29.50 -54 13 37.0           ~ 77 0
14 ACO 653 ClG 08 21 50.6 +01 11 49           ~ 34 0
15 ACO 901 ClG 09 55 56.9256 -10 01 46.519           ~ 100 1
16 NAME ACO 901-902 Supercluster SCG 09 56 -10.0           ~ 112 1
17 ACO 907 ClG 09 58 21.84 -11 03 47.5           ~ 115 0
18 ACO 1084 ClG 10 44 37.1 -07 04 47           ~ 69 0
19 ACO 1348 ClG 11 41 24.0 -12 16 00           ~ 60 0
20 NAME NGC 4073 Group GrG 12 04 21.7 +01 50 19     13.53     ~ 245 0
21 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 194 0
22 ACO S 700 ClG 12 36 40 -33 54.5           ~ 28 0
23 ACO 1663 ClG 13 02 52.55 -02 31 04.0           ~ 91 0
24 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1022 0
25 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 621 1
26 ACO 1914 ClG 14 26 01.3 +37 49 36           ~ 273 0
27 ACO 2050 ClG 15 16 21.6 +00 05 59           ~ 88 0
28 ACO 2051 ClG 15 16 53.8 -01 05 06           ~ 47 0
29 2MAXI J2014-244 ClG 20 14 49.7 -24 30 30           ~ 58 0
30 ACO S 868 ClG 20 23 00 -20 56.3           ~ 30 1
31 ACO 2328 ClG 20 48 13.9 -17 48 53           ~ 67 0
32 ACO 3771 ClG 21 29 47.7233 -50 46 37.428           ~ 40 0
33 ACO 3814 ClG 21 49 07.24 -30 42 06.4           ~ 51 0
34 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 625 2
35 ACO 2399 ClG 21 57 27.64 -07 48 12.9           ~ 163 0
36 ACO 3854 ClG 22 17 45.72 -35 43 31.4           ~ 59 0
37 ACO 3856 ClG 22 18 45.2 -38 53 57           ~ 71 2
38 ACO 3888 ClG 22 34 23.0 -37 43 29           ~ 125 1
39 ACO 3992 ClG 23 19 41.8 -73 13 51           ~ 31 0

    Equat.    Gal    SGal    Ecl

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2020.07.16-19:05:34

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