X-ray views of young Sun-like stars with debris disks

We propose to perform Xray observations of two young Sunlike stars which showevidence of circumstellar debris disks, likely associated to planetaryformation. In particular, we aim to observe DK Dra, a 30 Myr old Gtype dwarf,characterized by a warm (T virgul110 K) dusty disk at 46 AU from the star, and HD107146, a young (100 Myr) solar twin, with a cold extended (virgul200 AU) debris diskwhich was recently resolved in scattered light, and at submillimetric andmillimetric wavelengths. The proposed observations will allow us to addressseveral issues concerning the formation and evolution of planetary systemsaround Sunlike stars, the influence of highenergy radiation on thecircumstellar medium, and to complement previous studies on the evolution of the coronal emission of solartype stars. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]