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

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

2002-12-17

arxiv.org/abs/astro-ph/0212392v2

JCAP 0305 (2003) 007

Astronomy and Astrophysics

Astrophysics

20 pages, 13 figures, to be published in JCAP

Scientific paper

10.1088/1475-7516/2003/05/007

The Sunyaev-Zel'dovich (SZ) effect of galaxy clusters is characterized by three parameters: 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 analyze the systematic errors (of the order micro K) on the SZ measurement introduced by finite bandwidths, and suggest a possible method of reducing these errors.

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