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Radio Halos and Relics in Clusters of Galaxies and Detection Statistics

Published online by Cambridge University Press:  26 May 2016

Gabriele Giovannini
Affiliation:
Dipartimento di Fisica, viale B. Pichat 6/2, 40127 Bologna, Italy and Istituto di Radioastronomia, CNR, Bologna, Italy
Luigina Feretti
Affiliation:
Istituto di Radioastronomia, CNR, via Gobetti 101, 40129 Bologna, Italy
Federica Govoni
Affiliation:
Dipartimento di Astronomia, via Ranzani 1, 40127 Bologna, Italy

Abstract

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New sensitive VLA observations confirm the existence of halo and relic sources in 6 Abell clusters where a diffuse emission was found in the NVSS.

We find evidence that the frequency of clusters with halos and relics is larger in clusters with high X-ray luminosity. The evidence that the occurrence of a halo source is larger at high redshifts is marginal.

Type
Part 3: Clusters of Galaxies
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Condon, J. J., Cotton, W. D., Greisen, E. W., Yin, Q. F., Perley, R.A., Taylor, G. B., & Broderick, J. J.: 1998, AJ, 115, 1693 CrossRefGoogle Scholar
Ebeling, H., Voges, W., Bohringer, H., Edge, A. C., Huchra, J. P., & Briel, U. G.: 1996, MNRAS, 283, 1103 CrossRefGoogle Scholar
Giovannini, G., Tordi, M., & Feretti, L.: 1999, New Astron., 4, 141 CrossRefGoogle Scholar
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