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Mass Discrepancy in the Galaxy Cluster RBS 864 Derived from X-rays and Gravitational Lensing

Published online by Cambridge University Press:  19 May 2006

G.A. Mamon ,
F. Combes ,
C. Deffayet ,
B. Fort ,
M. Gitti ,
W. Kausch ,
T. Erben  and
S. Schindler
M. Gitti
Affiliation:
Institute of Astrophysics, University of Innsbruck, Austria
W. Kausch
Affiliation:
Institute of Astrophysics, University of Innsbruck, Austria
T. Erben
Affiliation:
IAEF, University of Bonn, Germany
S. Schindler
Affiliation:
Institute of Astrophysics, University of Innsbruck, Austria
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Abstract

We present the preliminary results from a combined X-ray/ lensing investigation of the galaxy cluster RBS 864 (z = 0.29). Morphological and spectral studies of X-ray data show a relaxed appearance of this cluster, thus allowing us to derive a good mass estimate. From optical data we found the presence of a very high number of arc candidates and performed a strong lensing mass analysis. We found a large discrepancy in the comparison of the X-ray and lensing masses.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 20: Mass Profiles and Shapes of Cosmological Structures , 2006 , pp. 281 - 282
Copyright
© EAS, EDP Sciences, 2006

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