Most observations of σ Ori E: challenging the centrifugal breakout narrative

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DOIResolve DOI: http://doi.org/10.1088/0004-637X/769/1/33
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TypeArticle
Journal titleThe Astrophysical Journal
ISSN0004-637X
Volume769
Issue1
Article number33
AbstractWe present results from three weeks' photometric monitoring of the magnetic helium-strong star σ 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 observationally inferred magnetospheric mass against that predicted by a breakout analysis. The large discrepancy between the values leads us to argue that centrifugal breakout does not play a significant role in establishing the magnetospheric mass budget of σ Ori E.
Publication date
LanguageEnglish
AffiliationNational Science Infrastructure; National Research Council Canada
Peer reviewedYes
NPARC number21270383
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Record identifierc468f727-442d-4511-b474-bfc4e98968e2
Record created2014-02-06
Record modified2016-05-09
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