The scatter in the radial profiles of X-ray luminous galaxy clusters as diagnostic of the thermodynamical state of the ICM

Details The scatter in the radial profiles of X-ray luminous galaxy clusters as diagnostic of the thermodynamical state of the ICM The scatter in the radial profiles of X-ray luminous galaxy clusters as diagnostic of the thermodynamical state of the ICM

2010-11-26

arxiv.org/abs/1011.5783v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 9 figures. MNRAS accepted. Introduction and list of references slighlty enlarged compared to the previous version

Scientific paper

We study the azimuthal scatter in the radial profiles of X-ray luminous galaxy clusters, with two sets of high-resolution cosmological re-simulations obtained with the codes ENZO and GADGET2. The average gas profiles are computed for different angular sectors of the cluster projected volume, and compared with the mean cluster profiles at each radius from the center. We report that in general the level of azimuthal scatter is found to be about 10 per cent for gas density, temperature and entropy inside R200, and about 25 per cent for X-ray luminosity for the same volume. These values generally doubles going to 2 R200 from the cluster center, and are generally found to be higher (by about 20-40 percent) in the case of perturbed systems. A comparison with results from recent SUZAKU observations is discussed, showing the possibility to simply interpret the large azimuthal scatter of observables in light of our simulated results.

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