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A statistical study of the relationship between X-ray, optical and radio luminosity for a sample of QSOs

Published online by Cambridge University Press:  19 July 2016

D.M. Worrall ,
P. Giommi ,
H. Tananbaum  and
G. Zamorani
D.M. Worrall
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, U.S.A.
P. Giommi
Affiliation:
EXOSAT Observatory, ESA-ESOC, Darmstadt, F.R.G.
H. Tananbaum
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, U.S.A.
G. Zamorani
Affiliation:
Istituto di Radioastronomia, Bologna, Italy

Abstract

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Our statistical study finds that the X-ray luminosity, lx for an average QSO of given optical luminosity, lo is an increasing function of radio luminosity, lr. An average QSO of given lo and lr has higher lx if the radio spectrum is flat than if it is steep. The correlation between lx, lo and lr appears to be improved if lr refers only to core emission, lrcore. Assuming an average radio-loud QSO is a radio-quiet QSO with a separate component which produces lrcore and Ixcore, lxcore/lrcore is larger if the core is that of a QSO with extended radio structure than if that of a compact flat-spectrum QSO.

Type
II. Continuum Emission
Information
Symposium - International Astronomical Union , Volume 119: Quasars , 1986 , pp. 263 - 264
Copyright
Copyright © Reidel 1986 

References

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