Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..23..391g&link_type=abstract
Astrophysics and Space Science, Volume 23, Issue 2, pp.391-401
Astronomy and Astrophysics
Astrophysics
2
Scientific paper
The radio properties ofUhuru X-ray sources with fairly certain extragalactic identifications are described briefly. Radio to X-ray flux ratios are low for rich clusters of galaxies and high for double radio sources. There is some evidence from the Abell 426 (Perseus) and Abell 1367 clusters that a radio galaxy in a rich cluster may be the centre of extended X-ray emission. Nuclei of galaxies have an enormous range in X-ray luminosity; the known range is from ˜1030 W for our galaxy to ˜3×1038 W for 3C 273. Unidentified X-ray sources at high galactic latitudes may include new classes of objects with very low radio to X-ray flux ratios or hard X-ray emission.
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