Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-08-20
AIP Conf.Proc.616:351-353,2002
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures, Poster presented at 2K1BC Workshop, July 9-12 2001, Breuil-Cervinia (Italy)
Scientific paper
10.1063/1.1475656
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.
Jetzer Ph
Piffaretti Rocco
Puy Denis
Schindler Sabine
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