The Rigidly Rotating Magnetosphere of σ Orionis E

Type Journal Article
Names R. H. D. Townsend, S. P. Owocki, D. Groote
Publication The Astrophysical Journal Letters
Volume 630
Issue 1
Pages L81-L84
Date September 1, 2005
Library Catalog NASA ADS
Abstract We characterize the observed variability of the magnetic helium-strong star σ Ori E in terms of a recently developed rigidly rotating magnetosphere model. This model predicts the accumulation of circumstellar plasma in two corotating clouds, situated in magnetohydrostatic equilibrium at the intersections between the magnetic and rotational equators. We find that the model can reproduce well the periodic modulations observed in the star's light curve, Hα emission-line profile, and longitudinal field strength, confirming that it furnishes an essentially correct, quantitative description of the star's magnetically controlled circumstellar environment.
Tags Stars: Circumstellar Matter, stars: chemically peculiar, stars: early-type, stars: individual (HD 37479), stars: magnetic fields, stars: rotation
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