Blazars: Beamed or not beamed

Details Blazars: Beamed or not beamed Blazars: Beamed or not beamed

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.251...55t&link_type=abstract

In ESA Proceedings of the Joint Varenna-Abastumani International School and Workshop on Plasma Astrophysics p 55-59 (SEE N87-15

Astronomy and Astrophysics

Astrophysics

1

Beams (Radiation), Bl Lacertae Objects, Blazars, Galactic Nuclei, Quasars, Active Galactic Nuclei, Astronomical Models, Galactic Evolution, Galactic Radiation, Spectrum Analysis

Scientific paper

The author has proposed a picture where Blazars are active galactic nuclei consisting of jet structures, whose bulk velocity and beaming is increasing towards the outside. The X-ray optical and radio emission are produced at increasing distances from the center. This picture is suggested by a systematic study of the spectral shape at various frequencies and from the observation that in a number of objects the variability time scales are decreasing with frequency. The picture appears consistent with number counts for the class, without the requirement of special evolution of BL Lacs.

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