2017A&A...606A..24A


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.08CEST15:00:42

2017A&A...606A..24A - Astronomy and Astrophysics, volume 606A, 24-24 (2017/10-1)

Variegate galaxy cluster gas content: Mean fraction, scatter, selection effects, and covariance with X-ray luminosity.

ANDREON S., WANG J., TRINCHIERI G., MORETTI A. and SERRA A.L.

Abstract (from CDS):

We use a cluster sample selected independently of the intracluster medium content with reliable masses to measure the mean gas mass fraction and its scatter, the biases of the X-ray selection on gas mass fraction, and the covariance between the X-ray luminosity and gas mass. The sample is formed by 34 galaxy clusters in the nearby (0.050<z<0.135) Universe, mostly with 14<logM500/M≥14.5, and with masses calculated with the caustic technique. First, we found that integrated gas density profiles have similar shapes, extending earlier results based on subpopulations of clusters such as those that are relaxed or X-ray bright for their mass. Second, the X-ray unbiased selection of our sample allows us to unveil a variegate population of clusters; the gas mass fraction shows a scatter of 0.17±0.04dex, possibly indicating a quite variable amount of feedback from cluster to cluster, which is larger than is found in previous samples targeting subpopulations of galaxy clusters, such as relaxed or X-ray bright clusters. The similarity of the gas density profiles induces an almost scatterless relation between X-ray luminosity, gas mass, and halo mass, and modulates selection effects in the halo gas mass fraction: gas-rich clusters are preferentially included in X-ray selected samples. The almost scatterless relation also fixes the relative scatters and slopes of the LX-M and Mgas-M relations and makes core-excised X-ray luminosities and gas masses fully covariant. Therefore, cosmological or astrophysical studies involving X-ray or SZ selected samples need to account for both selection effects and covariance of the studied quantities with X-ray luminosity/SZ strength.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: clusters: intracluster medium - X-rays: galaxies: clusters - galaxies: clusters: general - methods: statistical - methods: statistical

Status at CDS:  

Simbad objects: 35

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Number of rows : 35

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 117 ClG 00 56 20.03 -10 00 02.1           ~ 63 0
2 ACO 208 ClG 01 31 35.08 +00 32 14.4           ~ 36 0
3 ACO 279 ClG 01 56 16.96 +01 03 02.9           ~ 48 0
4 SDSS-C4 2081 C?G 02 19 06.3 +14 32 50           ~ 3 0
5 ACO 412 ClG 03 06 17.200 -00 08 34.60           ~ 17 0
6 ACO 628 ClG 08 10 09.68 +35 15 18.3           ~ 37 0
7 ACO 655 ClG 08 25 30.3 +47 07 48           ~ 87 0
8 SDSS-C4 3009 ClG 09 07 49.57 +52 47 04.9           ~ 6 0
9 SDSS-C4 1209 ClG 09 56 34.18 -00 22 20.7           ~ 6 0
10 [YSS2008] 169 ClG 10 40 55.7 +58 18 16           ~ 10 1
11 MCXC J1053.7+5452 ClG 10 53 44.4 +54 52 21           ~ 39 0
12 ACO 1132 ClG 10 58 25.8 +56 47 30           ~ 96 1
13 ACO 1189 ClG 11 11 04.20 +01 05 24.3           ~ 31 0
14 ACO 1238 ClG 11 22 05.37 +00 47 03.0           ~ 89 0
15 SDSS-C4 1073 ClG 11 22 54.328 +01 06 51.85           ~ 6 0
16 ACO 1302 ClG 11 33 16.7 +66 22 43           ~ 54 0
17 ACO 1346 ClG 11 41 11.06 +05 44 47.9           ~ 58 0
18 ZwCl 1141+0601 C?G 11 44 07.6 +05 46 11           ~ 3 0
19 ACO 1424 ClG 11 57 30.50 +05 05 24.5           ~ 55 0
20 ZwCl 1207+0542 ClG 12 10 16.8 +05 23 08           ~ 27 0
21 SDSS-C4 1120 C?G 12 34 16.8 +03 58 58           ~ 3 0
22 ACO 1650 ClG 12 58 36.76 -01 43 34.2           ~ 265 0
23 SDSS-C4 1132 ClG 13 00 35.37 -02 09 06.9           ~ 6 0
24 ACO 1663 ClG 13 02 52.55 -02 31 04.0           ~ 90 0
25 SDSS-C4 1009 ClG 13 12 20.0 -01 01 27           ~ 5 0
26 ZwCl 1316-0044 ClG 13 19 19.93 -00 53 56.9   18.368   17.101   ~ 12 0
27 SDSS-C4 3049 ClG 13 32 43.3 +60 08 48           ~ 5 0
28 ACO 1780 ClG 13 44 42.20 +02 52 33.9           ~ 47 0
29 ACO 1809 ClG 13 53 03.72 +05 08 17.7           ~ 152 0
30 SDSS-C4 1067 C?G 14 08 19.7 +05 26 12           ~ 3 0
31 SDSS-C4-DR3 1020 ClG 14 17 35.531 +02 03 11.57     14.89     ~ 23 0
32 ACO 2026 ClG 15 08 31.919 -00 16 03.00           ~ 44 0
33 ACO 2048 ClG 15 15 16.52 +04 22 46.5           ~ 92 0
34 ACO 2051 ClG 15 16 53.8 -01 05 06           ~ 46 0
35 [SPD2011] 24962 ClG 15 29 19.6 +52 53 52           ~ 11 0

    Equat.    Gal    SGal    Ecl

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2020.04.08-15:00:42

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