AAS 205th Meeting, 9-13 January 2005
Session 73 Distances, the CMB and the Sunyaev-Zeldovich Effect
Oral, Tuesday, January 11, 2005, 10:00-11:30am, Golden Ballroom

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[73.05] Impact of Systematic Errors on Sunyaev-Zeldovich Effect Surveys

M. R. Francis (Rutgers University), R. Bean (Princeton University), A. Kosowsky (Rutgers University)

Future high-resolution microwave background measurements hold the promise of detecting all galaxy clusters within our Hubble volume through their Sunyaev-Zeldovich signature, down to a given limiting flux. Since the number density of clusters depends strongly on the evolution of the cosmological scale factor, it should be possible to place tight constraints on quantities such as the dark energy equation of state, the primordial power spectrum of fluctuations, and neutrino masses. We evaluate the ability of future cluster surveys to measure these quantities simultaneously, when combined with WMAP and supernova data. However, sensitivity to cosmology also implies sensitivity to systematic errors. We model the impact of known systematic errors, including uncertainty about the cluster mass-SZ flux relation, the theoretical cluster mass function, and potential survey biases, on the cosmological constraints from cluster SZ surveys. We also investigate the dependence of cosmological constraints on the cluster flux limit and compare the relative advantages of wide versus deep cluster surveys.

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© 2004. The American Astronomical Society.