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

Nabila Aghanim·Steen H. Hansen·Sergio Pastor·Dmitry V. Semikoz
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Abstract

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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Nabila Aghanim, Steen H. Hansen, Sergio Pastor, Dmitry V. Semikoz. 2003-05-12. Extraction of cluster parameters with future Sunyaev-Zel'dovich observations. https://doi.org/10.1088/1475-7516%2F2003%2F05%2F007

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