2008ApJ...673L..17G

Query : 2008ApJ...673L..17G

2008ApJ...673L..17G - Astrophys. J., 673, L17-L20 (2008/January-3)

Trouble for AGN feedback? the puzzle of the core of the galaxy cluster AWM 4.

GASTALDELLO F., BUOTE D.A., BRIGHENTI F. and MATHEWS W.G.

Abstract (from CDS):

The core of the relaxed cluster AWM 4 is characterized by a unique combination of properties which defy a popular scenario for AGN heating of cluster cores. A flat inner temperature profile is indicative of a past, major heating episode which completely erased the cool core, as testified by the high central cooling time (≳3 Gyr) and by the high central entropy level (∼60 keV cm2). Yet the presence of a 1.4 GHz active central radio galaxy with extended radio lobes out to 100 kpc reveals recent feeding of the central massive black hole. A system like AWM 4 should have no radio emission at all if only feedback from the cooling hot gas regulates the AGN activity.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Cooling Flows - Galaxies: Clusters: General - galaxies: clusters: individual (AWM 4) - X-Rays: Galaxies: Clusters

CDS comments: 0735+7241 is a misprint for 0735+7421 (= ZwCl 0735+7421)

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 699 1
2 ZwCl 0735+7421 ClG 07 41 40.3 +74 14 58     17.70     ~ 254 0
3 ACO 644 ClG 08 17 24.5 -07 30 46           ~ 225 0
4 NAME Hya A LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1012 1
5 ACO 780 ClG 09 18 30 -12 15.7           ~ 453 0
6 ClG J0947+7623 ClG 09 46 59.916 +76 23 43.99           ~ 150 0
7 NVSS J094712+762312 Rad 09 47 12.5 +76 23 12           ~ 151 1
8 NGC 3842 BiC 11 44 02.155 +19 56 59.37 14.22 13.70 11.82 12.04   ~ 287 3
9 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1076 1
10 ACO 1446 ClG 12 01 54.77 +58 01 40.7           ~ 100 1
11 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7196 3
12 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 304 0
13 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 11.40 12.122 11.386 ~ 783 3
14 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0
15 ACO 2029 ClG 15 10 56.2 +05 44 42           ~ 943 0
16 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 730 1
17 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 768 0
18 AWM 4 ClG 16 04 52.01 +23 56 26.9     14.38     ~ 130 0
19 NGC 6051 BiC 16 04 56.6684912064 +23 55 57.622768392   14.9       ~ 112 2
20 ACO 2240 ClG 16 54 04 +66 44.3           ~ 17 0
21 ACO 2244 ClG 17 02 40.33 +34 02 58.7           ~ 281 0
22 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 316 1

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