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An observational evaluation of magnetic confinement in the winds of BA supergiants★
Magnetic wind confinement has been proposed as one explanation for the complex wind structures of supergiant stars of spectral types B and A. Observational investigation of this hypothesis was undertaken using high-resolution (λ/Δλ ∼ 65 000) circular polarization (Stokes V) spectra of six late B- and early A-type supergiants (β …