SPECTRAL SIMILARITY OF FAST-EXPANDING SCATTERING-DOMINATED ENVELOPES

摘要

We discuss recent numerical and analytical results that show that different sets of input parameters for supernovaova model atmospheres yield synthetic spectra that are indistinguishable from one another. The underlying physical reason for this phenomenon is that the atmospheres are Thomson scattering-dominated, and have a gray scattering coefficient. Implications for distance measurements by means of the expanding photosphere method are briefly discussed.