Synthetic Spectra of Hydrodynamic Models of Type Ia Supernovae

摘要

We present detailed non-LTE synthetic spectra of hydrodynamic supernovae (SNe) Ia models. We make no assumptions about the form of the spectrum at the inner boundary. We calculate both Chandrasekhar- mass deflagration models and sub-Chandrasekhar "helium detonators." Gamma-ray deposition is handled in a simple, accurate manner. We have parameterized the storage of energy, which arises from the time- dependent deposition of radioactive decay energy, in a reasonable manner that spans the expected range. We find that the Chandrasekhar-mass deflagration model W7 of Nomoto, Thielemann, & Yokoi shows good agreement with the observed spectra of SN 1992A and SN 1994D, particularly in the UV, where our models are expected to be most accurate.