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Newly Synthesized Elements and Pristine Dust in the Cassiopeia A Supernova Remnant
Spectroscopic observations at 2.4 - 45 microns of the young supernova remnant Cas A with the Infrared Space Observatory (ISO) Short Wavelength Spectrometer (SWS) reveal strong emission lines of O, Ne, Si, S, and Ar. These lines are observed at high velocities (several thousand km/s), and are therefore associated with the supernova ejecta known as the fast-moving knots (FMKs). Continuum emission from dust is also seen in the Cas A spectrum. The continuum strength is spatially well correlateddoi:10.1086/307545 fatcat:hhzxa5q6qvg2vpc3zwjxkxglpa