Is the Eagle Nebula powered by a hidden supernova remnant questionMark

Spitzer observations of the Eagle nebula (M16) reveal the presence of a large (8pc diameter) shell of dust heated to anomalously high temperatures. Modeling ofdust excitation shows that the shell emission cannot be powered by the clusterUV radiation but that it can be accounted for by collisionally heated dust in ayoung (a few 1000 yrs) supernova remnant. We have reanalyzed deep Chandraobservations that show diffuse emission consistent with this hypothesis, butalso with galactic ridge emission. We propose a 50 ksec XMM observation to probethe spatial extent of the diffuse Xray emission beyond the Spitzer shell.Absence of emission outside of this shell will strongly support the supernovaremnant interpretation truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]