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Do Jets Exist in All Compact Extragalactic Objects?

Published online by Cambridge University Press:  12 April 2016

Yu. A. Kovalev  and
Y. Y. Kovalev
Yu. A. Kovalev
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia
Y. Y. Kovalev
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia

Abstract

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New results of instantaneous spectra study confirms an old hypothesis that extragalactic radio sources have a double structure. Instantaneous 1–22 GHz spectra and their long-term variability for VLBI-compact extragalactic objects monitored during 1979–1997 at the RATAN–600 are used. Analysis of these spectra gives that a VLBI-compact continuous jet have to be by a general structure and spectra component of such objects. The observed multi component VLBI-structures are bound to be, as a rule, the brightest regions of such continuos jet. A second component is a relatively extended, optically thin cloud (a lobe or an envelope, connected with the jet), weaker to higher frequencies. Thus, the HF-component of such spectra, measured by VLBI and by a single dish antenna, have to be practically the same. Such jets can exist in about 200 compact objects of our sample and seem to exist in majority or even all extragalactic compact objects.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 275 - 276
Copyright
Copyright © Astronomical Society of the Pacific 1998

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