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MOST observations of [sigma] Ori E: challenging the centrifugal breakout narrative

  • David B, Guenther
  • Rhd, Townsend
  • Th, Rivinius
  • Jason Rowe
  • Afj, Moffat
  • J M, Matthews
  • D, Bohlender
  • C, Neiner
  • J H, Telting
  • T, Kallinger
Publication Date
May 19, 2013
SETI Institute


We present results from three weeks photometric monitoring of the magnetic helium-strong star [sigma] Ori E using the Microvariability and Oscillations of Stars microsatellite. The star s light curve is dominated by twice-per-rotation eclipse-like dimmings arising when magnetospheric clouds transit across and occult the stellar disk. However, no evidence is found for any abrupt centrifugal breakout of plasma from the magnetosphere, either in the residual flux or in the depths of the light minima. Motivated by this finding we compare the ...

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