Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..96..405b&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 96, no. 2, Oct. 1983, p. 405-416.
Astronomy and Astrophysics
Astrophysics
Astronomical Models, Galactic Evolution, Galactic Nuclei, Interstellar Gas, Milky Way Galaxy, Cosmic Plasma, Galactic Structure, High Temperature Gases, Plasma Layers, Shock Fronts
Scientific paper
A model that can explain the recurrent explosions in galactic centers is outlined. The surface of the dense nuclear core is considered as a standing shock front with respect to the motion of the incoming gas. The temperature of the gas is maintained above 50,000 K due to several heating effects, so that the gas in the core is almost completely ionized. The accreted gas moves towards the center by the strong gravitational pull of the core, creating a plasma layer close to the center. The plasma density and frequency of the layer increases with time, with the layer eventually behaving as a reflecting layer with respect to the long wave radiation emitted by the central radiation source. The increasing plasma frequency traps the frequency radiation, leading to a rising radiation pressure which overcomes the gravitational binding force. Periodically the layer bursts, ejecting material outward at high velocities.
Basu Baidyanath
Bhattacharyya Tanaya
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