SIMBAD references

2016ApJ...833..227A - Astrophys. J., 833, 227-227 (2016/December-3)

Stirred, not clumped: evolution of temperature profiles in the outskirts of galaxy clusters.


Abstract (from CDS):

Recent statistical X-ray measurements of the intracluster medium (ICM) indicate that gas temperature profiles in the outskirts of galaxy clusters deviate from self-similar evolution. Using a mass-limited sample of galaxy clusters from cosmological hydrodynamical simulations, we show that the departure from self-similarity can be explained by non-thermal gas motions driven by mergers and accretion. Contrary to previous claims, gaseous substructures only play a minor role in the temperature evolution in cluster outskirts. A careful choice of halo overdensity definition in self-similar scaling mitigates these departures. Our work highlights the importance of non-thermal gas motions in ICM evolution and the use of galaxy clusters as cosmological probes.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): cosmology: theory - galaxies: clusters: general - galaxies: clusters: intracluster medium - methods: numerical - X-rays: galaxies: clusters - X-rays: galaxies: clusters

Simbad objects: 1

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