Measurements of the Sunyaev-Zel'dovich Effect Increment with Herschel

Details Measurements of the Sunyaev-Zel'dovich Effect Increment with Herschel Measurements of the Sunyaev-Zel'dovich Effect Increment with Herschel

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21914317z&link_type=abstract

American Astronomical Society, AAS Meeting #219, #143.17

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Scientific paper

The Sunyaev--Zel'dovich (SZ) effect is a spectral distortion of the cosmic microwave background as observed through the hot plasma in galaxy clusters. This distortion is a decrement in the cosmic microwave background intensity for lambda > 1.3 mm, an increment at shorter wavelengths, and small again by lambda 200 microns. The Spectral and Photometric Imaging Receiver (SPIRE) on the Herschel Space Observatory has bands centered at 250, 350 and 500 microns which ideally span the short wavelength end of the SZ effect increment. Measurements at these wavelengths confirm the spectral behaviour of the SZ effect, and are optimally positioned to constrain the temperature of the inter-cluster medium through relativistic corrections to the thermal SZ spectrum. The Herschel Multi-tiered Extragalactic Survey and Herschel Lensing Survey programmes have mapped tens of massive clusters with SPIRE and, among other science highlights, have detected the SZ effect at the two longest SPIRE wavelengths. In this paper we present new measurements of the SZ effect increment and constraints on the sub-mm contamination present in cluster fields for longer wavelength measurements of the SZ effect.

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