Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...271..524g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 271, Aug. 15, 1983, p. 524-530. Research supported by the Piano Spaziale Na
Astronomy and Astrophysics
Astronomy
18
Radio Sources (Astronomy), X Ray Sources, Active Galactic Nuclei, Bl Lacertae Objects, Galactic Clusters, Quasars, Very Large Array (Vla)
Scientific paper
A complete sample of 35 X-ray selected sources found with the Einstein Observatory has been observed with the Very Large Array at 6 cm to investigate the relationship between radio and X-ray emission in extragalactic objects. Detections include three active galactic nuclei (AGNs), two clusters or groups of galaxies, two individual galaxies, and two BL Lac objects. The frequency of radio emission in X-ray selected AGNs is compared with that of optically selected quasars using the integral radio-optical luminosity function. The result suggests that the probability for X-ray selected quasars to be radio sources is higher than for those optically selected. No obvious correlation is found in the sample between the richness of X-ray luminosity of the cluster and the presence of a galaxy with radio luminosity at 5 GHz larger than 10 to the 30th ergs/s/Hz.
Feigelson Eric D.
Gioia Isabella Maria
Maccacaro Tomasso
Schild Rudolph
Zamorani Gianni
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