2005A&A...429..399Z


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.07CET05:28:29

2005A&A...429..399Z - Astronomy and Astrophysics, volume 429, 399-415 (2005/1-2)

Heating groups and clusters of galaxies: The role of AGN jets.

ZANNI C., MURANTE G., BODO G., MASSAGLIA S., ROSSI P. and FERRARI A.

Abstract (from CDS):

X-ray observations of groups and clusters of galaxies show that the Intra-Cluster Medium (ICM) in their cores is hotter than expected from cosmological numerical simulations of cluster formation which include star formation, radiative cooling and SN feedback. We investigate the effect of the injection of supersonic AGN jets into the ICM using axisymmetric hydrodynamical numerical simulations. A simple model for the ICM, describing the radial properties of gas and the gravitational potential in cosmological N-Body+SPH simulations of one cluster and three groups of galaxies at redshift z=0, is obtained and used to set the environment in which the jets are injected. We varied the kinetic power of the jet and the emission-weighted X-ray temperature of the ICM. The jets transfer their energy to the ICM mainly by the effects of their terminal shocks. A high fraction of the injected energy can be deposited through irreversible processes in the cluster gas, up to 75% in our simulations. We show how one single, powerful jet can reconcile the predicted X-Ray properties of small groups, e.g. the LX-TX relation, with observations. We argue that the interaction between AGN jets and galaxy groups and cluster atmospheres is a viable feedback mechanism.

Abstract Copyright:

Journal keyword(s): galaxies: intergalactic medium - galaxies: jets - hydrodynamics - methods: numerical - cosmology: theory - X-rays: galaxies: clusters

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2002 1
2 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3621 3
3 NAME Hya A LIN 09 18 05.651 -12 05 43.99   14.38 14.8     ~ 920 1
4 NAME Spiderweb Galaxy AGN 11 40 48.3 -26 29 09     22.00     ~ 254 1
5 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6356 3
6 3C 294 rG 14 06 44.00 +34 11 25.0           ~ 218 1
7 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2155 2

    Equat.    Gal    SGal    Ecl

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2021.03.07-05:28:29

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