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The most favored progenitor scenarios for Type Ia supernovae (SNe Ia) involvethe single-degenerate (SD) scenario and the double-degenerate scenario. Theabsence of stripped hydrogen (H) in the nebular spectra of SNe Ia challengesthe SD progenitor models. Recently, it was shown that pure deflagrationexplosion models of Chandrasekhar-mass white dwarfs ignited off-centerreproduce the characteristic observational features of 2002cx-like SNe Ia verywell. In this work we predict, for the first time, the amount of stripped H forthe off-center pure deflagration explosions. We find that their low kineticenergies lead to inefficient H mass stripping (less than 0.01 M_sun),indicating that the stripped H may be hidden in (observed) late-time spectra ofSN 2002cx-like SNe Ia.

Predicting the amount of hydrogen stripped by the supernova explosion for SN 2002cx-like SNe Ia