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Session 45 - Supernovae.
Display session, Tuesday, January 14
The soft X-ray emission seen from SN\,1987A and the apparent deceleration of the radio source expansion suggest that the supernova blast wave has encountered a moderately dense H\,II region interior to the inner circumstellar ring. We simulate the hydrodynamics of this interaction and calculate the resulting X-ray and ultraviolet emission line spectrum and light curves. The soft X-ray spectrum is dominated by emission lines of hydrogenic and helium-like C, N, O, and Ne; it is consistent with the ROSAT observations if Fe is depleted on grains. Broad, N\,V\,\lambda\lambda1240 and Ly\alpha emission should brighten steadily and should be observable easily with the Hubble Space Telescope, and broad H\alpha, with ground-based telescopes. The blast wave should strike the inner circumstellar ring ca. AD\,2007.
Program listing for Tuesday