Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312..659m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 312, Jan. 15, 1987, p. 659-665.
Astronomy and Astrophysics
Astrophysics
7
Angular Velocity, Hot Stars, Magnetic Stars, Stellar Magnetic Fields, Stellar Rotation, Stellar Winds, Azimuth, Kinetic Equations, Lorentz Force, Stellar Models
Scientific paper
The model of Friend and MacGregor (1984) is used to study the dynamical interplay between the azimuthal velocity and the Lorentz force in the line-driven wind from a rotating, magnetic, hot star. It is found that strong, outward acceleration by the radiative force can cause the azimuthal component of the magnetic force to reverse direction and act counter to the sense of the stellar rotation. One manifestation of this behavior is a faster than 1/r decrease in V(phi) over a limited spatial region near the base of the flow. By consideration of the wind momentum equation in the corotating reference frame, such a magnetic force reversal is shown to be a consequence of the required force balance perpendicular to the magnetic field.
Friend David B.
MacGregor Keith B.
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