Hydrodynamical Simulations of Galaxy Clusters |
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Authors: | Stefano Borgani |
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Institution: | (1) Dipartimento di Astronomia, Universit’a di Trieste, via Tiepolo 11, I-34131 Trieste, Italy |
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Abstract: | In my contribution I discuss the relevance that hydrodynamical simulation of clusters can play to understand the ICM physics
and to calibrate mass estimates from X-ray observable quantities. Using hydrodynamical simulations, which cover quite a large
dynamical range and include a fairly advanced treatment of the gas physics (cooling, star formation and SN feedback), I show
that scaling relations among X-ray observable quantities can be reproduced quite well. At the sametime, these simulations
fail at accounting for several observational quantities, which are related to the cooling structure of the ICM: the fraction
of stars, the temperature profiles and the gas entropy in central cluster regions. This calls for the need of introducing
in simulations suitable physical mechanisms which should regulate the cooling structure of the ICM. |
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Keywords: | cosmology: numerical simulations galaxies: clusters hydrodynamics X-ray: galaxies |
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