Probing centrifugal magnetospheres of B-type stars

Recently, a new generation of polarimetric instruments has uncovered apopulation of massive OBstars hosting strong, organized magnetic fields.Magnetic channeling of these OB stars. strong winds leads to the formation oflargescale shockheated magnetospheres. Using the new analysis of trends in 64magnetic OB stars (Petit et al. 2013), we have identified an important region ofmagnetosphere parameter space for which Xray trends can provide importantconstraints on the shock physics and general properties of these magnetospheres.We propose to probe the centrifugal magnetospheres of Btype stars using EPICobservations of 7 stars that will provide stringent tests of the MagneticallyConfined Wind Shock (MCWS) paradigm of massive star Xray emission. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]