XMM spectro-imagery of two young ejecta-dominated SNRs: Kepler and W49B

We propose to perform an XMM observation of two young thermal supernova remnantsKepler and W49B of similar size, but with different morphologies (shelllikeand centerfilled). The objectives of the proposal are: to constrain their origin (supernova type, progenitor and environment) andevolution stage by determining their distribution in abundances, in temperatureand in ionization state. to map and characterize the Xray synchrotron emission (power law index,rolloff energy) to constrain the model of cosmicray acceleration in supernovaremnants. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]