The detonation of a sub-Chandrasekhar-mass white dwarf at the origin of the low-luminosity Type Ia supernova 1999by

Stéphane Blondin, Luc Dessart, D. John Hillier

While Chandrasekhar-mass ($M_{\mathrm{Ch}}$) models with a low ${}^{56}\mathrm{Ni}$ yield can match the peak luminosities of fast-declining, 91bg-like Type Ia supernovae (SNe Ia), they system…