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Clusters with extended radio emission at high frequencies

Published online by Cambridge University Press:  14 August 2015

R. Wielebinski
R. Wielebinski*
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, F.R.G.

Extract

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The existence of ‘haloes’ in clusters of galaxies was deduced by Ryle and Windram (1968) for the Perseus cluster and by Willson (1970) for the Coma cluster at 408 MHz by comparing total flux measured by a single dish with the sum of fluxes of radio sources found in the field. A direct measurement of the extended source Coma C was made by Jaffe et al. (1976) at 610 MHz. the failure to detect the halo of Coma at higher frequencies is attributed by all authors to a steep spectrum of this extended component.

Type
II. Clusters of Galaxies
Information
Symposium - International Astronomical Union , Volume 79: The Large Scale Structure of the Universe , 1978 , pp. 157 - 159
Copyright
Copyright © Reidel 1978 

References

Haslam, C.G.T., Kronberg, P.P., Waldthausen, H., Wielebinski, R., Schallwich, D. 1977, Astron. Astrophys. Suppl. (in press) Google Scholar
Jaffe, W.J., Perola, G.C., Valentijn, E.A. 1976. Astron. Astrophys. 49, 179 Google Scholar
Ryle, M., Windram, M.D. 1968, Monthly Notices Roy. Astron. Soc. 138, 1 CrossRefGoogle Scholar
Willson, M.A.G. 1970, Monthly Notices Roy. Astron. Soc. 151, 1 CrossRefGoogle Scholar