ON THE INTERPRETATION OF SUPERNOVA LIGHT ECHO PROFILES AND SPECTRA

摘要: The light echo (LE) systems of historical supernovae in the Milky Way and local group galaxies provide an unprecedented opportunity to reveal effects asymmetry on observables, particularly optical spectra. Scattering dust at different locations LE ellipsoid witnesses supernova from perspectives, consequently scattered toward Earth preserves shape line profile variations introduced by asymmetries photosphere. However, interpretation spectra date has not involved a detailed consideration outburst duration geometrical scattering modifications due finite filament dimension, inclination, image point-spread function spectrograph slit width. In this paper, we explore implications these factors present framework for future-resolved interpretation, test it against Cas A SN 1987A We conclude that full modeling dimensions orientation using observed LEs two or more epochs is critical correct Indeed, without doing so one might falsely differences exist when none are actually present.