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

The most favored progenitor scenarios for Type Ia supernovae (SNe Ia) involve the single-degenerate (SD) scenario and the double-degenerate scenario. The absence of stripped hydrogen (H) in the nebular spectra of SNe Ia challenges the SD progenitor models. Recently, it was shown that pure deflagration explosion models of Chandrasekhar-mass white dwarfs ignited off-center reproduce the characteristic observational features of 2002cx-like SNe Ia very well. In this work we predict, for the first time, the amount of stripped H for the off-center pure deflagration explosions. We find that their low kinetic energies 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 of SN 2002cx-like SNe Ia.