COMMON ENVELOPE EVOLUTION AND CORONAL SUPERSATURATION

We propose to obtain the first high resolution Xray spectra of the fastestrotating stars outside of accreting systems: the secondaries of precataclysmicvariables that are thought to have undergone common envelope evolution. Theresulting data will: (1) Provide C and N abundances with which to perform adefinitive test of common envelope evolution theory for precataclysmicbinaries; (2) Probe the phenomenon of supersaturation.. and coronalmorphology, temperature structure and abundances at rotation rates a factor oftwo greater than studied to date. This coronal activity is responsible for theangular momentum loss that ultimately leads to Roche lobe overflow andaccretion. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]