Mathematics – Logic
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...18111816w&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #118.16; Bulletin of the American Astronomical Society, Vol. 25, p.740
Mathematics
Logic
Scientific paper
We report a detection of the Sunyaev-Zel'dovich effect at mm wavelengths. A decrement in the brightness of the cosmic microwave background corresponding to Delta y=2.7 +/- 0.7 times 10(-4) has been observed at a wavelength of 2.2 mm in the direction of the x-ray bright Abell cluster 2163. The performance of the novel receiver used for this measurement and analysis of the confusion limits to measurements at these wavelengths indicate that the Sunyaev-Zel'dovich effect can be measured with precision in a large number of clusters. Measurements at mm wavelengths are expected to suffer from less source confusion than measurements at other wavelengths, and allow the thermal and kinetic Sunyaev-Zel'dovich effects to be distinguished from one another. Measurements at several mm wavelengths together with x-ray observations allow determination of the radial component of the peculiar velocity of the cluster. The measurement of the thermal Sunyaev-Zel'dovich effect in several clusters allows a determination of the Hubble expansion parameter which is independent of the usual cosmological distance scale.
Ade Peter A. R.
Fischer Marc L.
Ho T. R.
Holzapfel William L.
Lange Andrew E.
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