The magnetic field of Sigma Orionis E

Details The magnetic field of Sigma Orionis E The magnetic field of Sigma Orionis E

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224l...5l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 224, Aug. 15, 1978, p. L5-L8. Research supported by the National Res

Astronomy and Astrophysics

Astrophysics

84

B Stars, Line Spectra, Magnetic Stars, Stellar Atmospheres, Stellar Magnetic Fields, Emission Spectra, H Alpha Line, Helium, Magnetic Equator, Variable Stars

Scientific paper

A magnetic field has been detected in the peculiar variable helium-rich B2 star Sigma Ori E. The field varies between minus 2300 and plus 3100 gauss with the 1.19-day period of the spectroscopic and light variations of the star. It is suggested that the detection of this field allows all the variable phenomena of Sigma Ori E to be understood in terms of an oblique-rotator model in which hot gas is trapped in a magnetosphere above the magnetic equator and atmospheric helium enhancement has accurred preferentially in a magnetosphere above the magnetic equator and atmospheric helium enhancement has occurred preferentially in a zone around the magnetic equator.

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