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Title: Steady hydromagnetic flows in open magnetic fields. III. Allowing for variations of density with latitude and nonalignment of velocity with magnetic field

Abstract

A steady hydromagnetic stellar wind flowing in a rotating axisymmetric partially open magnetic field is modeled under the assumptions that the density is a function of radial distance only and that the flow is everywhere aligned to the local magnetic field. The model illustrates that monotonic acceleration of the wind speed in the polar region requires a decrease of density toward the stellar pole at fixed radial distance. In the presence of rotation, a nonalignment between the flow velocity and the magnetic field is found to be necessary for the acceleration of the poloidal flow speed from below to above the Alfven speed defined in terms of the poloidal part of the magnetic field. 13 refs.

Authors:
;  [1]
  1. High Altitude Observatory, Boulder, CO (USA)
Publication Date:
OSTI Identifier:
5398517
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal; (USA)
Additional Journal Information:
Journal Volume: 342; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; STELLAR WINDS; MAGNETOHYDRODYNAMICS; ACCELERATION; ASTROPHYSICS; DIFFERENTIAL EQUATIONS; MAGNETIC FIELD CONFIGURATIONS; MAGNETIC FIELDS; ROTATION; VELOCITY; EQUATIONS; FLUID MECHANICS; HYDRODYNAMICS; MECHANICS; MOTION; STELLAR ACTIVITY; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources

Citation Formats

Hu, Y Q, and Low, B C. Steady hydromagnetic flows in open magnetic fields. III. Allowing for variations of density with latitude and nonalignment of velocity with magnetic field. United States: N. p., 1989. Web. doi:10.1086/167661.
Hu, Y Q, & Low, B C. Steady hydromagnetic flows in open magnetic fields. III. Allowing for variations of density with latitude and nonalignment of velocity with magnetic field. United States. doi:10.1086/167661.
Hu, Y Q, and Low, B C. Sat . "Steady hydromagnetic flows in open magnetic fields. III. Allowing for variations of density with latitude and nonalignment of velocity with magnetic field". United States. doi:10.1086/167661.
@article{osti_5398517,
title = {Steady hydromagnetic flows in open magnetic fields. III. Allowing for variations of density with latitude and nonalignment of velocity with magnetic field},
author = {Hu, Y Q and Low, B C},
abstractNote = {A steady hydromagnetic stellar wind flowing in a rotating axisymmetric partially open magnetic field is modeled under the assumptions that the density is a function of radial distance only and that the flow is everywhere aligned to the local magnetic field. The model illustrates that monotonic acceleration of the wind speed in the polar region requires a decrease of density toward the stellar pole at fixed radial distance. In the presence of rotation, a nonalignment between the flow velocity and the magnetic field is found to be necessary for the acceleration of the poloidal flow speed from below to above the Alfven speed defined in terms of the poloidal part of the magnetic field. 13 refs.},
doi = {10.1086/167661},
journal = {Astrophysical Journal; (USA)},
issn = {0004-637X},
number = ,
volume = 342,
place = {United States},
year = {1989},
month = {7}
}