Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-26
Astrophys.J.600:501-507,2004
Astronomy and Astrophysics
Astrophysics
15 pages, 3 figures, accepted for publication in ApJ
Scientific paper
10.1086/380119
We present a quantitative estimate of the confusion of cluster radio halos and galaxies in the measurement of the angular power spectrum of the thermal Sunyaev-Zel'dovich (SZ) effect. To achieve the goal, we use a purely analytic approach to both radio sources and dark matter of clusters by incorporating empirical models and observational facts together with some theoretical considerations. It is shown that the correction of cluster radio halos and galaxies to the measurement of the thermal SZ angular power spectrum is no more than 20% at $l>2000$ for observing frequencies $\nu>30$ GHz. This eliminates the concern that the SZ measurement may be seriously contaminated by the existence of cluster radio sources.
Wu Xiang-Ping
Zhou Wei
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