Extraction of cluster parameters with future Sunyaev-Zel'dovich observations

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  • 17 December 2002
Abstract
The Sunyaev-Zel'dovich (SZ) effect of galaxy clusters is characterised by three parameters namely: Compton parameter, electron temperature and cluster peculiar velocity. In the present study we consider the problem of extracting these parameters using multi-frequency SZ observations only. We show that there exists a parameter degeneracy which can be broken with an appropriate choice of frequencies. As a result we discuss the optimal choice of observing frequencies from a theoretical point of view. Finally, we analyse the systematic errors (of the order micro K) on the SZ measurement introduced by finite bandwidths, and suggest a possible method of reducing this error.

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