The Rigidly Rotating Magnetosphere of Sigma Ori E

Details The Rigidly Rotating Magnetosphere of Sigma Ori E The Rigidly Rotating Magnetosphere of Sigma Ori E

2005-03-30

arxiv.org/abs/astro-ph/0503668v3

Astrophys.J.630:L81-L84,2005

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, accepted by ApJ

Scientific paper

10.1086/462413

We attempt to characterize the observed variability of the magnetic helium-strong star sigma Ori E in terms of a recently developed rigidly rotating magnetosphere model. This model predicts the accumulation of circumstellar plasma in two co-rotating clouds, situated in magnetohydrostatic equilibrium at the intersection between magnetic and rotational equators. We find that the model can reproduce well the periodic modulations observed in the star's light curve, H alpha emission-line profile, and longitudinal field strength, confirming that it furnishes an essentially correct, quantitative description of the star's magnetically controlled circumstellar environment.

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