2001AJ....122..327L

We have analyzed Hubble Space Telescope (HST) archival and IUE NEWSIPS archival SWP spectra of the dwarf novae CM Del and AH Her obtained when AAVSO light-curve data indicated the occurrence of dwarf nova quiescence. We have computed synthetic, high-gravity spectra in LTE with solar composition using TLUSTY195 and SYNSPEC42 and have carried out fits of these models to the far-UV continuum and narrow absorption line spectra. For CM Del, we find that the far-UV spectrum is dominated by a hot (T_eff=22,000 K and logg=8) white dwarf, but reliable information on the metal abundances is unavailable because of the quality of the data. For AH Her, we find evidence for a hot white dwarf with T_eff=27,000 K and logg=8, with subsolar abundance for Si. An HST spectrum (GHRS G160M) of AH Her reveals blue-asymmetric Si IV profiles. If this is due to wind outflow, we derive a single-scattering, upper limit, mass-loss rate of 10^–9 M_☉.yr^–1. Synthetic profile fits to 12 co-added HST medium-resolution G160M spectra of the Si IV (1393, 1402 Å) resonance doublet of CM Del yield a white dwarf rotational velocity estimate of vsini=400⁺⁷⁰_–30 km.s^–1 and Si/H=1^+0.5_–0.3 times solar. The value of vsini for CM Del is discussed in the context of angular momentum transfer and rotation rates for other cataclysmic variable, primary degenerate stars.