The first mass and angular momentum loss measurements for a CV-like binary

The period distribution of close binaries, cataclysmic variables, novae andsingledegenerate SN1a progenitor candidates is largely controlled bymagneticallydriven mass and angular momentum loss (AML) from the M dwarfsecondary. The mass loss rates for these spunup stars remain essentiallyunknown and impossible to observe directly, while AML presciptions for CVsdiffer by orders of magnitude. One way to measure the mass loss rate is toobserve the dM wind accrete onto its WD companion in a preCV very close toRoche Lobe overflow but lacking the obscuring complications and emission from anaccretion disk. The beststudied nearby preCV is QS Vir. MHD models tailored tothe system will enable the first quasidirect measurements of the mass loss and AML from a CVlike binary. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]