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   PR # 12081
      We have developed a new method, magnetic Doppler imaging (MDI), for
    mapping surface temperatures and magnetic field distributions on
    stars. Its application to a young K2 dwarf, with simultaneous ASCA,
    EUVE, IUE and ground-based observations, will permit for the first
    time a determination of the spatial relationships between magnetic
    flux, non-radiative heating in the outer atmosphere, and local temper
    ature inhomogeneities of an active cool dwarf. The high spectral
    resolution coronal diagnostics will permit a detailed study of
    stellar plage/spot properties, and is a step towards realistic multi-
    component atmosphere models.  The data will also be used to test
    empirical activity theories, coronal loop models, and MHD heating
   theories.
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