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The Effects of Nearby Clusters of Galaxies on the Microwave Background RadiationThis project proposed to use the COBE (Cosmic Background Explorer) DMR sky-maps to measure the anisotropies introduced into the microwave background radiation by the Sunyaev-Zel'dovich and Rees-Sciama effects of nearby clusters and superclusters of galaxies. We intended to seek these effects by making maps of the best-fit anisotropies on particular angular scales and comparing the apparent anisotropies near target clusters and superclusters with the statistical noise and sky variance. The locations of the clusters and superclusters were to be found using HEAO-1 (High Energy Astronomy Observatory) A2 and Einstein X-ray maps. Checks against biases were to be made using radio and X-ray sky-maps as guides to the properties of the clusters and superclusters. Any signals detected would have implications for the gas properties and baryonic masses of clusters and superclusters. The scientific background, project activities and references to published papers are included.
Document ID
19990068039
Acquisition Source
Goddard Space Flight Center
Document Type
Contractor or Grantee Report
Authors
Birkinshaw, M.
(Smithsonian Astrophysical Observatory Cambridge, MA United States)
Date Acquired
August 19, 2013
Publication Date
June 1, 1999
Subject Category
Space Radiation
Funding Number(s)
CONTRACT_GRANT: NAG5-2415
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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