Time-resolved IR spectroscopy of WZ Sge was obtained using NIRSPEC on Keck II .
We detect CO and H _ { 2 } emission from the accretion disk placing WZ Sge into a rarefied class of astronomical objects including YSOs and high luminosity early-type stars .
During the eclipse phase , the molecular emission greatly weakens but no firm evidence for the secondary star is seen allowing new limits on its luminosity to be determined .
The detection of molecular emission provides physical properties within the outer disk of T=3000K and N _ { H } > 10 ^ { 10 } cm ^ { -3 } .
Such a cool , dense region , not associated with areas of H I and He I emission , provides the first observational confirmation of predictions made by accretion disk models .