The SZ effect and non-trivial clusters

Details The SZ effect and non-trivial clusters The SZ effect and non-trivial clusters

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007newar..51..390h&link_type=abstract

New Astronomy Reviews, Volume 51, Issue 3-4, p. 390-393.

Astronomy and Astrophysics

Astronomy

Scientific paper

The cluster temperature has been measured using the Sunyaev Zeldovich (SZ) effect alone, finding excellent agreement with X-ray temperature determinations. However, the galaxy clusters are not iso-thermal, and the radial temperature dependence will affect the cluster parameters derived through the observation of the SZ effect. One finds that the Compton weighted electron temperature is accurately derived through SZ observations, however, the derived peculiar velocity will be systematically shifted by 10 20%. We also address the possibility that clusters are locally only in kinetic equilibrium (not in full local thermal equilibrium), which will affect the SZ effect.

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