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X-Ray Properties of Extragalactic Compact Objects

Published online by Cambridge University Press:  04 August 2017

G. Zamorani
G. Zamorani*
Affiliation:
Istituto di Radioastronomia, C.N.R, Bologna, Italy

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The compact objects which are the subject of this talk are essentially quasars and Seyfert galaxies; I will only briefly mention a couple of results about BL Lac objects. Before describing the X-ray properties of these objects, it is useful to introduce a “working” definition of radio-quiet and radio-loud quasars: I will call radio-loud quasars all the objects which have been detected at radio frequencies and have a spectral index between radio (5 GHz) and optical frequencies (2500 A) greater than 0.35 (Zamorani et al. 1981); all the other objects will be considered radio-quiet. Note that this definition is independent of distance and is a function only of the relative importance of radio and optical emission.

Information

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 110: VLBI and Compact Radio Sources , 1984, pp. 85 - 94
Copyright
Copyright © Reidel 1984 

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