CAOSP abstracts, Volume: 38, No.: 2, year: 2008

Abstract: The magnetically sensitive atmosphere of a star is an ideal detector of the magnetic field penetrating the atmospheric layer - regardless of whether the field source is inside or outside the star. Most magnetic stars possess their own magnetic field sources in their interiors, and one usually neglects the possibility of externally caused influences of magnetic fields. Only powerful interior or nearby magnetic sources may influence detectably the atmosphere of a star with a sufficiently large surface. An externally influenced magnetic field can be found in a binary system consisting of a non-magnetic giant with a magnetic dwarf companion.