Measurements of the Sunyaev-Zel'dovich Effect at 2.2 mm

Wilbanks, T. M., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Fischer, M. L., Ho, T. R., Holzapfel, W. L., Osgood, D. E. and Lang, A. E. 1993. Measurements of the Sunyaev-Zel'dovich Effect at 2.2 mm. Presented at: 181st AAS Meeting, Phoenix, AZ, 3-7 Jan 1993.

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Abstract

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.

Item Type:	Conference or Workshop Item (Other)
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Last Modified:	28 Oct 2022 09:34
URI:	https://orca.cardiff.ac.uk/id/eprint/74936

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