[SEMINARI] On the role of AGN feedback on the thermal and chemodynamical properties of the hot intracluster medium, Susana Planelles

[Enric Marco]

Title:  On the role of AGN feedback on the thermal and chemodynamical 
properties of the hot intracluster medium

by: Susana Planelles

from: Astronomy Unit, Department of Physics, University of Trieste, 
INAF-Osservatorio Astronomico Di Trieste, Italia

where: Seminari del departament d'Astronomia i Astrofisica

Date: Dijous 19 desembre 2013, 12:00 h.

Resum

Reproducing the observed X-ray scaling relations, the cooling flow 
problem, and the different thermal properties of cool core and non-cool 
core clusters still represent a challenge for current cosmological 
simulations of galaxy clusters.
In this talk, I will present the general analysis of a set of 
cosmological hydrodynamical simulations of galaxy clusters and groups, 
performed with the SPH GADGET-3 code, with the aim of studying the 
relative role played by different feedback sources on the general 
intracluster medium (ICM) properties: scaling relations, thermal radial 
profiles, and chemical enrichment. In order to do so, besides a set of 
non-radiative simulations, we carried out two sets of simulations 
including radiative cooling, star formation, metal enrichment and 
feedback from supernovae, one of which also accounts for the effect of 
feedback from active galactic nuclei (AGN) resulting from gas accretion 
onto super-massive black holes.
Our results confirm that including AGN feedback goes in the right 
direction of reconciling simulation predictions and observations for 
several observational ICM properties. However, a number of important 
discrepancies still exist, highlighting that the model needs to be 
improved to produce the correct interplay between cooling and feedback 
in central cluster regions.

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Dr. Enric Marco
Departament d'Astronomia i Astrofísica
Facultat de Física
Universitat de València
C/  Dr. Moliner, 50
46100 Burjassot, Spain
Phone: (34)-96-354-3069
Fax:(34)-96-354-3084
enric.marco en uv.es
www.uv.es/marco
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