Infrared and optical light curves of the dwarf nova EM Cygni

Authors:
  • RJR. F. Jameson
    R. F. Jameson
  • AKA. R. King
    A. R. King
  • MSM. R. Sherrington
    M. R. Sherrington
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Abstract
We report simultaneous infrared and optical light curves of EM Cygni. The infrared curves are dominated by ellipsoidal variations of the late-type star in the system, which must have spectral type near K2V. The distance to the system is estimated as ∼ 320 pc and the accretion disc shown to be close to the minimum size expected from angular-momentum considerations.