Sunyaev-Zel'dovich Effect Scaling Relations From The SZA and LoCuSS

Details Sunyaev-Zel'dovich Effect Scaling Relations From The SZA and LoCuSS Sunyaev-Zel'dovich Effect Scaling Relations From The SZA and LoCuSS

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21330402m&link_type=abstract

American Astronomical Society, AAS Meeting #213, #304.02; Bulletin of the American Astronomical Society, Vol. 41, p.273

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a measurement of the scaling relationship between galaxy cluster mass and the Sunyaev-Zel'dovich effect observable Y, the integrated Compton y parameter for a sample of clusters from the Local Cluster Substructure Survey. Tight scaling between cluster mass and Y is required in order to use galaxy clusters to constrain dark energy, but this has not been verified observationally. We use masses determined from strong and weak gravitational lensing, so we do not assume hydrostatic equilibrium in the clusters. From this sample we are able to estimate the intrinsic scatter in the M-Y relationship and, via comparison with a larger sample of SZ clusters with hydrostatic masses, we evaluate the bias introduced by the HSE assumption.

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