Bringing stripped stars to X-ray light

We request 35ks exposure time to measure Xray spectra of two prototypicalmassive binary Be stars with sdO companions. We aim to probe the theory whichpredicts that Betype stars are the products of close binary evolution, andthat a significant fraction of them have hot companions which were stripped ofhydrogen by a mass exchange. These hot stripped.. companions with sdO spectraltypes drive stellar winds which could collide and interact with the Be starwinds and disks, and hence have unique signatures in their Xray emission. Thetwo prototypical Be+sdO systems, phi Per and o Pup, probe different orbitalconfigurations, primary.s spectral types, and sdOstar mass. Comparativeanalysis of their Xray spectra will uncover leading processes responsible for plasma heating in Be+sdO stars. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]