Revisiting the Hyades openParDA2+dK2closePar Eclipsing Binary V471 Tauri with XMM-Newton

We request 60 ks to secure XMM EPIC/OMUV observations of the Hyades (DAZ+K2V)12.5hr eclipsing binary V471 Tau. V471 Tau is an astrophysical lab for testingtheories of binary star evolution, stellar physics as well as hosting a probablebrown dwarf. We propose to capitalize on unique XMM.s Xray/UV capabilities tosecure simultaneous Xray \\ UV observations. These are crucial forcharacterizing the 9.25min Xray UV flux modulations seen previously. The XUVvariations are theorized to arise from wind accretion on the WDs displacedmagnetic poles relative to its rotation poles. The WDs rotation period alsoserves as an independent clock to search for the Light Travel Time Effect fromthe movement of EB s barycenter by a brown dwarf. A 15.6yr Xray cycle will also be studied. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]