Trouble for cluster parameter estimation from blind SZ surveys?

Details Trouble for cluster parameter estimation from blind SZ surveys? Trouble for cluster parameter estimation from blind SZ surveys?

2004-02-24

arxiv.org/abs/astro-ph/0402571v2

Astronomy and Astrophysics

Astrophysics

Accepted version (09/03/2005) in press in A&A. Modified content and title, SPT section removed

Scientific paper

10.1051/0004-6361:20040322

(Abriged version) The Sunyaev-Zel'dovich (SZ) effect of galaxy clusters is a tool to measure three quantities: Compton parameter, electron temperature, and cluster peculiar velocity. However, a major problem is non-removed contamination by astrophysical sources that emit in the SZ frequencies. This includes interstellar dust emission, infra-red (IR) galaxies, and radio sources in addition to primary Cosmic Microwave Background (CMB) anisotropies. The three former contaminations induce systematic shifts in the three SZ parameters. In this study, we carefully estimated, both for a large beam experiment (namely Planck Surveyor) and a small beam experiment (ACT-like), the systematic errors that result if a fraction of the expected levels of emission from dust, IR galaxies, and radio sources remains non-removed. ...

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