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Rotation Measures and Cosmology

Published online by Cambridge University Press:  14 August 2015

Philipp P. Kronberg
Philipp P. Kronberg*
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, F.R.G. Scarborough College, University of Toronto, Canada

Extract

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The very low upper limits on distributed intergalactic (i.g.) HI (Gunn and Peterson 1965, Wampler 1967), and H2 (Field et al. 1966) have made it clear for some time now that if a smooth distributed i.g. gas exists in significant amounts (Ωig ≳ 10^−3), it must be ionized. X-Ray emission from rich clusters of galaxies such as Coma, indeed show that an intracluster gas can be seen (cf. Field 1974). Also persuasive in this connection are the head-tail radio galaxies in clusters, whose prototype is NGC 1265 (Miley et al. 1972, Jaffe and Perola 1973).

Type
VII. More Interpretation of Cosmological Information on Radio Sources
Information
Symposium - International Astronomical Union , Volume 74: Radio Astronomy and Cosmology , 1977 , pp. 367 - 377
Copyright
Copyright © Reidel 1977 

References

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