Cosmology from Cluster SZ and Weak Lensing Data

Details Cosmology from Cluster SZ and Weak Lensing Data Cosmology from Cluster SZ and Weak Lensing Data

2002-05-21

arxiv.org/abs/astro-ph/0205345v2

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, to appear in proceedings of XXXVIIth Rencontres de Moriond, "The Cosmological Model"; h-depebndence correc

Scientific paper

Weak gravitational lensing and the Sunyaev-Zel'dovich effect provide complementary information on the composition of clusters of galaxies. Preliminary results from cluster SZ observations with the Very Small Array are presented. A Bayesian approach to combining this data with wide field lensing data is then outlined; this allows the relative probabilities of cluster models of varying complexity to be computed. A simple simulation is used to demonstrate the importance of cluster model selection in cosmological parameter determination.

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