共 21 条
Hydrodynamical simulations of galaxy clusters
被引:5
作者:
Borgani, S
[1
]
机构:
[1] Univ Trieste, Dipartimento Astron, I-34131 Trieste, Italy
关键词:
cosmology : numerical simulations;
galaxies : clusters;
hydrodynamics;
X-ray : galaxies;
D O I:
10.1007/s10509-004-4021-7
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
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 same time, 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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页码:51 / 56
页数:6
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