An observational evaluation of magnetic confinement in the winds of BA supergiants

  title={An observational evaluation of magnetic confinement in the winds of BA supergiants},
  author={Matthew E. Shultz and Gregg A. Wade and V{\'e}ronique Petit and Jason H. Grunhut and Coralie Neiner and David A. Hanes and The MiMeS Collaboration},
  journal={Monthly Notices of the Royal Astronomical Society},
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 ({\lambda}/{\Delta}{\lambda} {\sim} 65,000) circular polarization (Stokes V ) spectra of six late B and early A type supergiants ({\beta} Ori, B8Iae; 4 Lac, B9Iab; {\eta} Leo, A0Ib; HR1040, A0Ib; {\alpha} Cyg, A2Iae; {\nu} Cep, A2Iab), obtained with the instruments… 

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