Flow of stellar wind past X-radiation source

Details Flow of stellar wind past X-radiation source Flow of stellar wind past X-radiation source

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984rpee....4...26k&link_type=abstract

In its USSR Rept.: Eng. and Equipment (JPRS-UEQ-84-003) p 26 (SEE N84-26895 17-31) Transl. into ENGLISH from Izv. Akad. Nauk S

Computer Science

Magnetohydrodynamic Flow, Space Plasmas, Stellar Winds, Two Dimensional Flow, X Ray Sources, Coordinates, Equations Of State, Hydrodynamic Equations, Ionization, Plasma Heating, Plasma Temperature, Shock Waves, Subsonic Flow, Supersonic Flow

Scientific paper

Stellar wind past an X-ray source is treated as two-dimensional steady flow of a fully ionized plasma containing both protons and electrons. The corresponding equations of hydrodynamics and state, in a cylindrical system of coordinates with temperature as third variable, are solved for a supersonic gas stream. An analysis of the solution for dependence on the distance from the radiation source reveals that as this distance decreases, the amplitude of perturbations increases and near the source the stream becomes subsonic. Numerical integration of these equations must, therefore, be performed over a range several times wider than the critical distance at which radiative heating of the plasma raises its heat content to a level comparable to that of its kinetic energy. The authors also consider changes not only in the plasma temperature but also in the wind ionization content and corresponding changes in the plasma cooling rate caused by deexcitation of ions of heavy elements along streamlines. The results indicate existence of a forward shock wave with a cavity containing hot gas behind the front, and acceleration of the stream within the subsonic region.

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