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Paper: Do A-type Supergiants have Magnetic Fields?
Volume: 337, The Nature and Evolution of Disks Around Hot Stars
Page: 324
Authors: Verdugo, E.; Henrichs, H.F.; Talavera, A.; Gomez de Castro, A.I.; Schnerr, R.S.; Geers, V.C.
Abstract: The accepted driving mechanism for the mass loss in A-supergiants is radiation pressure. Several clues, however, point to a model of co-rotating clouds of gas and the existence of a weak magnetic field on the surface. We report on spectropolarimetric observations between 1999 and 2003 of 12 A-type supergiants taken with the MuSiCoS spectropolarimeter at the 2m Bernard Lyot telescope at the Pic-du-Midi. We present the values of the derived longitudinal component of the magnetic field. The significance of the results is discussed.
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