2021ApJ...908...17Z

Query : 2021ApJ...908...17Z

2021ApJ...908...17Z - Astrophys. J., 908, 17-17 (2021/February-2)

A study of gas entropy profiles of 47 galaxy clusters and groups out to the virial radius.

ZHU Z., XU H., HU D., SHAN C., ZHU Y., FAN S., ZHAO Y., GU L. and WU X.-P.

Abstract (from CDS):

Some observations, such as those presented in Walker et al., show that the observed entropy profiles of the intracluster medium (ICM) deviate from the power-law prediction of adiabatic simulations. This implies that nongravitational processes, which are absent in the simulations, may be important in the evolution of the ICM, and by quantifying the deviation, we may be able to estimate the feedback energy in the ICM and use it as a probe of the nongravitational processes. To address this issue, we calculate the ICM entropy profiles in a sample of 47 galaxy clusters and groups, which have been observed out to at least ∼r500 with Chandra, XMM-Newton, and/or Suzaku, by constructing a physical model to incorporate the effects of both gravity and nongravitational processes to fit the observed gas temperature and surface brightness profiles via Bayesian statistics. After carefully evaluating the effects of systematic errors, we find that the gas entropy profiles derived with best-fit results of our model are consistent with the simulation-predicted power-law profile near the virial radius, while the flattened profiles reported previously can be explained by introducing the gas clumping effect, the existence of which is confirmed in 19 luminous targets in our sample. We calculate the total feedback energy per particle and find that it decreases from ∼10 keV at the center to about zero at ∼0.35r200 and is consistent with zero outside ∼0.35r200, implying an upper limit of the feedback efficiency of ∼0.02 for the supermassive black holes hosted in the brightest cluster galaxies.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Galaxy clusters - Intracluster medium - X-ray sources

Simbad objects: 53

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Number of rows : 53
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 13 ClG 00 13 38.5 -19 30 19           ~ 107 1
2 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 517 0
3 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 648 1
4 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 195 0
5 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 391 1
6 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 326 0
7 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 389 0
8 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
9 ACO 3158 ClG 03 43 07.5 -53 38 09           ~ 327 0
10 ACO 478 ClG 04 13 24.8 +10 27 52           ~ 522 0
11 ACO 3266 ClG 04 31 26.4 -61 25 17           ~ 447 0
12 ACO S 540 ClG 05 40 06.2 -40 50 29           ~ 60 0
13 ACO 3378 ClG 06 05 53.7 -35 18 06           ~ 90 1
14 BAX 115.2425+55.4275 ClG 07 40 59.4 +55 25 55           ~ 34 0
15 ClG 0745-1910 ClG 07 47 32.4 -19 18 23           ~ 378 0
16 ACO 644 ClG 08 17 26.1 -07 31 13           ~ 241 0
17 ACO 681 ClG 08 36 12 +43 50.6           ~ 7 0
18 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 308 0
19 ACO 780 ClG 09 18 30 -12 15.7           ~ 469 0
20 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
21 ACO 1068 ClG 10 40 47.1 +39 57 19           ~ 232 0
22 ClG J1120+4318 ClG 11 20 07.6 +43 18 07           ~ 65 0
23 ACO 1246 ClG 11 23 57.4 +21 29 14           ~ 118 0
24 ACO 1331 ClG 11 38 59.5 +63 35 21           ~ 18 0
25 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 456 0
26 ClG J1159+5531 ClG 11 59 53.02 +55 32 22.8     15.64     ~ 100 1
27 ZwCl 1215+0400 ClG 12 17 43.62 +03 38 51.5           ~ 169 0
28 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
29 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
30 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
31 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
32 ZwCl 1332+5043 ClG 13 34 20.0 +50 30 54           ~ 42 0
33 ACO 1775 ClG 13 41 50.60 +26 21 10.6           ~ 324 0
34 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
35 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
36 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
37 ACO 1882 ClG 14 14 24.02 -00 22 39.9           ~ 47 0
38 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
39 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
40 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
41 ACO 2091 ClG 15 34.3 +10 14           ~ 21 0
42 ACO 2146 ClG 15 56 04.7 +66 20 24           ~ 192 0
43 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
44 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
45 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
46 ACO 2204 ClG 16 32 47.7 +05 34 18           ~ 457 0
47 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
48 CIZA J1825.3+3026 ClG 18 25 22.8 +30 26 32           ~ 58 0
49 ACO 2319 ClG 19 21 14.0 +43 56 57           ~ 495 1
50 ACO 3888 ClG 22 34 26.3 -37 44 29           ~ 151 1
51 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 272 1
52 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0
53 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 190 0

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