J un 2 00 4 Kinematics of X-ray Emitting Components in Cassiopeia A

We present high-resolution X-ray proper motion measurements of Cassiopeia A using Chandra X-ray Observatory observations from 2000 and 2002. We separate the emission into four spectrally distinct classes: Si-dominated, Fedominated, low-energy-enhanced, and continuum-dominated. These classes also represent distinct spatial and kinematic components. The Siand… (More)