Sunyaev-Zel'dovich Effect and Morphology of Galaxy Clusters
Astrophysics
2010-12-13 v2
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.
Cite
@article{arxiv.astro-ph/0108320,
title = {Sunyaev-Zel'dovich Effect and Morphology of Galaxy Clusters},
author = {R. Piffaretti and Ph. Jetzer and D. Puy and S. Schindler},
journal= {arXiv preprint arXiv:astro-ph/0108320},
year = {2010}
}
Comments
4 pages, 2 figures, Poster presented at 2K1BC Workshop, July 9-12 2001, Breuil-Cervinia (Italy)