X-ray studies of quasars with the Einstein Observatory. IV X-ray dependence on radio emission

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/164999· OSTI ID:6468883

Worrall, D M; Tananbaum, H; Giommi, P; Zamorani, G

The X-ray properties of a sample of 114 radio-loud quasars observed with the Einstein Observatory are examined, and the results are compared with those obtained from a large sample of radio-quiet quasars. The results of statistical analysis of the dependence of X-ray luminosity on combined functions of optical and radio luminosity show that the dependence on both luminosities is important. However, statistically significant differences are found between subsamples of flat radio spectra quasars and steep radio spectra quasars with regard to dependence of X-ray luminosity on only radio luminosity. The data are consistent with radio-loud quasars having a physical component, not directly related to the optical luminosity, which produces the core radio luminosity plus extra X-ray emission. 65 references.

• Research Organization: Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; EXOSAT Observatory, Darmstadt, West Germany; CNR, Istituto di Radioastronomia, Bologna, Italy
• OSTI ID: 6468883
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 313; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPARATIVE EVALUATIONS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
LUMINOSITY
MATHEMATICS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
QUASARS
RADIATIONS
RADIOWAVE RADIATION
STATISTICS
X RADIATION