Mass Cartography of Sunyaev-Zel'dovich Galaxy Clusters

Details Mass Cartography of Sunyaev-Zel'dovich Galaxy Clusters Mass Cartography of Sunyaev-Zel'dovich Galaxy Clusters

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop...95h&link_type=abstract

NOAO Proposal ID #1999A-0095

Computer Science

Scientific paper

We propose to use weak lensing to map the total mass distributions of six Sunyaev-Zel'dovich clusters. These mass maps will be compared with the cluster virial masses derived independently from the gas density and temperature distributions that we will measure using approved AXAF guaranteed time observations and existing centimeter-wave interferometric observations of the Sunyaev-Zel'dovich effect (SZE). These data will allow us to derive accurate values for the dark matter content of these clusters and determine their baryon fractions and mass- to-light ratios. In principle, the combination of weak lensing, AXAF, and SZE data overconstrains the dynamical state of the target cluster. Thus with all three data sets it will be possible to test the assumptions that go into our estimates for dark matter, including for example, hydrostatic equilibrium, spherical symmetry, and minimal substructure.

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