The single-degenerate channel for the progenitors of Type Ia supernovae

摘要: We have carried out a detailed studyh of one the most favoured evolutionary channels for production Type Ia supernova (SN Ia) progenitors, single-degenerate channel (CO + MS), where carbon/oxygen (CO) white dwarf (WD) accretes matter from an unevolved or slightly evolved non-degenerate star until it reaches Chandrasekhar mass limit. Employing Eggleton's stellar evolution code and adopting prescription Hachisu et al. accretion efficiency, we performed binary calculations about 2300 close WD systems mapped initial parameters in orbital period-secondary (P-M(2)) plane (for range masses) which lead to successful supernova. obtained accurate, analytical fitting formulae describe this parameter can be used population synthesis (BPS) studies. The contours P-M(2) differ those by low-mass CO WDs, are more common than massive WDs. confirm that WDs with as low 0.67 M. accrete efficiently reach implemented these results BPS study obtain birth rates SNe time both constant formation rate single starburst. lower (but comparable to) inferred observationally.