Assigned ID: 222 ----- Attempting Submission 1 (Thu Mar 06 22:55:05 GMT 2008) ----- In this AR-Theory program, we propose to carry out a series of investigations of grain injection, transport, and destruction using hydrodynamical models of reverse-shocked SN ejecta. In a young supernova remnant (SNR) such as Cas A or SN 1987A the outer blast wave strikes surrounding circumstellar matter, and reverse shocks propagate inward toward the interior debris, which may contain large amounts of newly formed dust. Our major theoretical goals are to determine how much dust is destroyed in shocked SNR ejecta, as they are decelerated by the reverse shocks, and to study how these ejecta are lighted up in optical, X-ray, and IR line emission. Numerical codes will be used to study grain destruction in metal-enriched ejecta and to interpret the morphologies, proper motions, and emissivities of these fast-moving ejecta, observed by Hubble in many young SNRs. We intend to undertake the following tasks: (1) Compile the latest gas-grain data (sputtering yields vs projectile energy for H, He, and heavy ions); (2) Incorporate gas-grain and grain-grain interactions with radiative cooling rates (X-ray, optical, IR line emission) of sputtered atoms and ions; (3) Compute adaptive-mesh hydrodynamical models of ejecta-shock interactions; (4) Use these ejecta models to compute grain destruction, grain heating, plasma cooling, and spectral diagnostics in metal-enriched environments; (5) Apply our results to specific SNRs (Cas A, SN 1987A, G292, etc) to interpret ejecta morphologies, proper motions, and emissivities; (6) assess the net efficiency of supernova dust injection.

ISM AND CIRCUMSTELLAR MATTER 12 80300 false 0.0 0.0 false false true false false SUPPORTED