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The Mass and Structure of the Remnant of Tycho's Supernova
1983
Symposium - International astronomical union
A high resolution X-ray image of Tycho's supernova remnant obtained from the Einstein Observatory reveals three components of X-ray emission that we identify with shocked interstellar material, diffuse ejecta, and clumpy ejecta. This picture is applied to derive the mass of X-ray emitting material. Assuming a distance of 3 kpc, an absorbing column density of 3 × 1021 atoms/cm2, and using an ion-electron non-equilibrium calculation for the emissivity, we find the average density of the ISM is
doi:10.1017/s0074180900033611
fatcat:3obz33lzsrhitgfqva7o7g7zs4