Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...193..125t&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 193, no. 1-2, March 1988, p. 125-130.
Astronomy and Astrophysics
Astrophysics
11
Astronomical Models, Magnetohydrodynamic Flow, Plasma Dynamics, Stellar Winds, Cosmic Plasma, Hydrodynamic Equations, Plasma Density, Radial Distribution
Scientific paper
The authors present three classes of analytic solutions of the basic hydrodynamic equations assumed to govern the flow of plasma in the atmosphere of a rotating astrophysical object. In the first class, they have an accelerating helical wind-type outflow wherein a finite speed at the stellar surface accelerates monotonically outwards to an asymptotic speed at large radial distances, with a sinusoidal dependence in the latitude corresponding to a maximum flow at the equator and no flow at the poles. In the second class, they have a decelerating helical outflow wherein a finite initial speed decelerates monotonically to a lower speed at infinity, with a latitudinal dependence such that the flow is concentrated at the poles decreasing sinusoidally to zero at the equator. Finally, the third class of solutions with a spherically symmetric radial flow speed in a non-spherically symmetric plasma density may be regarded as a superposition of the previous two classes.
Tsinganos Kanaris
Vlastou-Tsinganos G.
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