``Imaging the SunyaevZel'dovich Effect''

Abstract
We report on results of interferometric imaging of the
SunyaevZel'dovich Effect (SZE) with the OVRO and BIMA
mmarrays. Using lownoise cmwave receivers on the arrays, we have
obtained high quality images for 27 distant galaxy clusters. We review
the use of the SZE as a cosmological tool. Gas mass fractions derived
from the SZE data are given for 18 of the clusters, as well as the
implied constraint on the matter density of the universe, $\Omega_M$.
We find $\Omega_M h_{100} \le 0.22 ^{+0.05}_{0.03}$.
A best guess for the matter density obtained by assuming a
reasonable value for the Hubble constant and also by attempting to account
for the baryons contained in the galaxies as well
as those lost during the cluster formation process
gives $\Omega_M \sim 0.25$. We also give
preliminary results for the Hubble constant.
Lastly, the power for investigating the high redshift
universe with a nontargeted high sensitivity SZE survey is discussed
and an interferometric survey is proposed.

