Early Lightcurves of Type Ia Supernovae are Consistent with Nondegenerate Progenitor Companions

J. Burke, D. A. Howell, D. J. Sand +16

If Type Ia supernovae (SNe~Ia) result from a white dwarf being ignited by Roche lobe overflow from a nondegenerate companion, then as the supernova explosion runs into the companio…