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Sunyaev-Zel'dovich Effect and Morphology of Galaxy Clusters

R. Piffaretti·Ph. Jetzer·D. Puy·S. Schindler
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Abstract

We investigate the influence of the finite extension and the aspherical geometry of a galaxy cluster on the estimate of the Hubble constant through the Sunyaev-Zel'dovich effect. An analysis of a recent CHANDRA image of the galaxy cluster RBS797 indicates a strong ellipticity and thus a pronounced aspherical geometry. We estimate the total mass of RBS797 assuming spherical or ellipsoidal geometry and show that in the latter case the mass is about 10-17 % less than the one inferred for a spherical shape.

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R. Piffaretti, Ph. Jetzer, D. Puy, S. Schindler. 2001-08-24. Sunyaev-Zel'dovich Effect and Morphology of Galaxy Clusters. https://doi.org/10.1063/1.1475656

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