  AG Dra is a symbiotic variable consisting of a metal poor, yellow giant mass
donor under-filling its Roche lobe, and a hot accreting white dwarf, possibly
surrounded by an optically thick, bright accretion disk which could be present
from wind accretion. We constructed NLTE synthetic spectral models for white
dwarf spectra and optically thick accretion disk spectra to model a FUSE
spectrum of AG Dra, obtained when the hot component is viewed in front of the
yellow giant. The spectrum has been de-reddened (E(B-V) = 0.05) and the model
fitting carried out, with the distance regarded as a free parameter, but
required to be larger than the Hipparcos lower limit of 1 kpc. We find that the
best-fitting model is a bare accreting white dwarf with Mwd = 0.4 Msun, Teff =
80,000K and a model-derived distance of 1543 pc. Higher temperatures are ruled
out due to excess flux at the shortest wavelengths while a lower temperature
decreases the distance below 1 kpc. Any accretion disk which might be present
is a only a minor contributor to the FUV flux. This raises the possibility that
the soft X-rays originate from a very hot boundary layer between a putative
accretion disk and the accreting star.
