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Asymptotic Structure of Rotating MHD Winds and Its Relation to Wind Boundary Conditions

Published online by Cambridge University Press:  25 May 2016

J. Heyvaerts  and
C.A. Norman
J. Heyvaerts
Affiliation:
Observatoire de Strasbourg and Université Louis Pasteur, 11, rue de l'Université, 67000 Strasbourg, France
C.A. Norman
Affiliation:
Physics and Astronomy, Johns Hopkins University and Space Telescope Science Institute, STScI, 3700, San Martin Drive, Baltimore, MD 21218, USA

Abstract

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Approximate asymptotic solutions for rotating MHD winds are obtained analytically in terms of the first integrals of the motion. It is shown that the paraxial region of such winds is a line-shaped boundary layer which has, even at large distances, the structure of a pressure-supported current pinch. A necessary condition for cylindrically focused asymptotics to be possible is derived. A simplified model by which the asymptotic structure of such winds can be obtained in terms of general boundary conditions at the wind source is introduced. Results of semi numerical solutions of the model are reported. The model is analytically solved in the limit of very fast rotators, giving in this particular case an explicit and complete description of the wind outputs and asymptotic structure in terms of arbitrary boundary conditions at the wind source.

Type
III. Theoretical Models
Information
Symposium - International Astronomical Union , Volume 182: Herbig-Haro Flows and the Birth of Low Mass Stars , 1997 , pp. 275 - 290
Copyright
Copyright © Kluwer 1997 

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