XMM-Newton Proposal 02056701

Details XMM-Newton Proposal 02056701 XMM-Newton Proposal 02056701

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop..296w&link_type=abstract

XMM-Newton Proposal ID #02056701

Physics

Ms 0451.6-0305, Xmm-Newton Proposal 02056701

Scientific paper

Sensitive XMM-Newton observations of the luminous Sunyaev-Zel'dovich effect cluster CL 0016+16 (z0.55) have led to considerably improved measurements of distance, gas-mass fraction, and Hubble constant, for a cluster at a redshift where curvature of the angular-diameter/redshift relation is particularly evident. We propose a deep observation of the cluster's twin, MS 0451.6-0305, to allow similar measurements for this second cluster. Averaging results for the two clusters will alleviate the potential problem of systematic errors in the distance estimate arising from projection effects. The results will also test the suggestion that the baryonic mass fraction in MS 0451.6-0305 is anomalously low, at only about a third the value seen in CL 0016+16.

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