Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.179..237v&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 179, no. 2, May 1991, p. 237-248.
Astronomy and Astrophysics
Astrophysics
1
Astronomical Models, Compression Waves, Cosmic Rays, Resonance Scattering, Shock Wave Propagation, Celestial Mechanics, Eclipses, Gas Dynamics, Planetary Atmospheres
Scientific paper
Consideration is given to a new class of nonstationary phenomena in the spatially modulated interaction of the cosmic radiation with absorptive matter. The peculiarity of these phenomena is the dynamic regeneration of longitudinal compression waves by scanning nonuniformities of external radiative heating, for the case when the propagation velocity of oscillations excited by the hem is close to the scanning velocity, i.e., the speed-resonance occurs. It is suggested that, before the speed-resonance pumping saturation level is attained, such a radiation-wave echo probably transforms into a set of shock waves, for excitation of which much more powerful sources are required, provided that the energy release is of the pulsing type. In its turn, dissipation of the shock waves, turbulization of matter, and local changes of its radiative balance can stimulate various instabilities and can result in observable nonstationary objects even in stationarily irradiated ones.
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