THE WAVELENGTH DEPENDENCE OF SGR A* SIZE AND THE
UNIFIED MODEL OF COMPACT RADIO SOURCES
1 Institute of Microelectronics and Informatics, Russian
Academy of Sciences, 21 Universitetskaya, 150007 Yaroslavl, Russia
Using, in particular, the data upon Sgr A*, we propose the unified model
of compact radio sources, i.e. of pulsars, maser sources, and active
galactic nuclei. The unification is based on the wavelength dependence of
radio source size. It is shown that the compact sources are characterized
by a maser amplification of thermal radio emission. The density,
temperature, and magnetic field profiles of compact sources are discussed.
The wavelength dependence of Sgr A* size is explained by the effect of the
gravitational field of a central energy source on a gas flow.