X-ray emission from an adolescent classical T Tauri star

We propose to perform highresolution Xray spectroscopy of MP Muscae, aclassical T Tauri star with an age of about 10 Myr, and hence quite old for itsclass. In fact, MP Mus is the only known star of this age with evidence of anaccretion disk, found in a survey of the Lower CentaurusCrux subgroup in theScorpius Centaurus association. Moreover, this star also shows evidence of acold dusty disk, as indicated by excess emission at IR and mm wavelengths. Theproposed observation will allow us to address several issues concerning theevolution of the Xray emission in premainsequence stars, the mechanism(s) ofsuch emission, the element abundances of the emitting plasma, and the influenceof highenergy radiation on the surrounding medium where planetary formation is likely occurring. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]