Unveiling the 3D temperature structure of galaxy clusters by means of the thermal SZ effect

Abstract

The Sunyaev-Zel'dovich (hereafter SZ) effect is a promising tool to derive the gas temperature of galaxy clusters. The approximation of a spherically symmetric gas distribution is usually used to determine the temperature structure of galaxy clusters, but this approximation cannot properly describe merging galaxy clusters. The methods used so far, which do not assume the spherically symmetric distribution, permit us to derive 2D temperature maps of merging galaxy clusters. In this paper, we propose a method to derive the standard temperature deviation and temperature variance along the line-of-sight, which permits us to analyze the 3D temperature structure of galaxy clusters by means of the thermal SZ effect. We also propose a method to reveal merger shock waves in galaxy clusters by analyzing the presence of temperature inhomogeneities along the line-of-sight.

8 pages, 3 figures, accepted for publication in MNRAS

References in corpus (5)

• Shocks and cold fronts in galaxy clusters
• On the onset of galactic winds in quiescent star forming galaxies
• Giant Ringlike Radio Structures Around Galaxy Cluster Abell 3376
• The Sunyaev-Zel'dovich temperature of the intracluster medium
• An analysis of the temperature structure of galaxy clusters by means of the thermal Sunyaev-Zel'dovich effect

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• Non-Equilibrium Ionization State and Two-Temperature Structure in the Bullet Cluster 1E0657-56
• Simulations of cm-wavelength Sunyaev-Zel'dovich galaxy cluster and point source blind sky surveys and predictions for the RT32/OCRA-f and the Hevelius 100-m radio telescope