Extraction of cluster parameters with future Sunyaev-Zel'dovich observations
Astrophysics
2009-11-07 v2 High Energy Physics - Phenomenology
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.
Cite
@article{arxiv.astro-ph/0212392,
title = {Extraction of cluster parameters with future Sunyaev-Zel'dovich observations},
author = {Nabila Aghanim and Steen H. Hansen and Sergio Pastor and Dmitry V. Semikoz},
journal= {arXiv preprint arXiv:astro-ph/0212392},
year = {2009}
}
Comments
20 pages, 13 figures, to be published in JCAP