DOI: https://doi.org/10.18524/1810-4215.1996.9.93175

A POSSIBLE REASON OF FORMING THE VARIOUS TYPE OF SPECTRA IN EXTRAGALACTIC OBJECTS

Yu. A. Kovalev, Y. Y. Kovalev

Анотація


An analysis of multifrequency observations of 1,300 instantaneous spectra at cantimeter-decimeter waves during 7 sets for a sample of up to 200 VLBI-compact objects gives a strong experimental evidence to an old hypothesis, that a VLBI-compact jet of relativistic particles from an object's nucleus is a main reason of forming the various type of spectra inextragalactic objects. It is enough to explain all main known spectra types (steep, flattened, inverted) by two spectra components only- of a quasi stationary jet in a longitudinal magnetic field and an optically thin cloud or envelope, resulted by the jet. A combination of thesetwo components gives also complex shapes in a case of a nonstationary phase of the jet.

Ключові слова


galaxies; compact - galaxies; active - quasars; general.

Повний текст:

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Посилання


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Kovalev Yu.A.: 1983, in 'Galactic and Extragalactic Radio Astronomy', p. 39 (in Russian).

Kovalev Yu.A., et al. 1997, Astron. Astrophys. (in preparation).

Kovalev Y.Y., Larionov G.M.: 1994, Astron. Zh. Lett., 20, 3.

Kovalev Y.Y.: 1995, in 'XXVIIth YERAC, Electronic Proceedings', Cambridge University Press. (http://www.cup.cam.ac.uk/onlinepubs/YERAC/home, html)

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