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Title:
Magnetorotational instability in Ap star envelopes
Authors:
Arlt, Reiner
Publication:
The A-Star Puzzle, held in Poprad, Slovakia, July 8-13, 2004. Edited by J. Zverko, J. Ziznovsky, S.J. Adelman, and W.W. Weiss, IAU Symposium, No. 224. Cambridge, UK: Cambridge University Press, 2004., p.103-108
Publication Date:
12/2004
Origin:
CUP
Keywords:
MHD, instabilities, stars: rotation
Comment:
ISBN: 0521850185
DOI:
10.1017/S1743921304004430
Bibliographic Code:
2004IAUS..224..103A

Abstract

The rotational evolution of the radiative zone of magnetic Ap stars is investigated with numerical simulations. An angular-velocity profile decreasing with axis distance in combination with a magnetic field leads to a magnetorotational instability. The resulting flows efficiently transport angular momentum outwards. The corresponding decay of angular-velocity gradients in the radiative zone is estimated to take about 10-100 million years.

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Database: Astronomy
Physics
arXiv e-prints