Observational study reveals TeV gamma-ray emission from the magnetic white dwarf binary AM Herculis, suggesting particle acceleration linked to magnetic phase modulation.
This paper reports a possible detection of TeV gamma rays from the magnetic white dwarf binary system AM Herculis, with a phase-averaged flux of (5.6 + or - 2.1) x 10 to the -11th photons/sq cm per sec at energies above 2 x 10 to the 12th eV. The gamma-ray light curve exhibits two broad emission peaks at magnetic phases around (0.1 + or - 0.2) and (0.6 + or - 0.2) and closely matches in shape the phase modulation of circularly polarized light emitted by the source.
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Bhat et al. (1991) studied this question.
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