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Dr. Elena Rasia: Hydrodynamical simulations: AGN feedback and its influence on the ICM of Galaxy Clusters

Date: 22. 5. 2017
Source: Astrodebate
V sredo, 24. maja, ob 12h v predavalnici F4 bo na astrodebati predavala dr. Elena Rasia s Tržaškega astronomskega observatorija o povratnem učinku aktivnih galaktičnih jeder na jatno snov. Vabljeni!
Hydrodynamical simulations: AGN feedback and its influence on the ICM of Galaxy Clusters
 
dr. Elena Rasia
INAF - National Institute for Astrophysics
Astronomical Observatory of Trieste 

Powerful phenomena determine the energy of Galaxy Clusters from sub-pc scales to Mpc distances. Via high-resolution, cosmological and hydrodynamical simulations we study how the main properties of the ICM (entropy, temperature, pressure, and metallicity) are influenced by the presence of the central AGN. We compare the results from runs with AGN feedback with those with "exclusively" stellar feedback to enhance the importance of the powerful AGN source. We found that the AGN are key to create the observed metal profile and to produce clusters which are cool cores. Observationally, cool-core clusters have precise physical characteristics: they are found in regular clusters with a symmetric and peaked surface brightness distribution and have a peaked metal profile. Our numerical models are able to reproduce most of the observed properties, thus can be used to derive some predictions on the evolution of these systems. 

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