Is KPD 1930+2752 a good SN Ia progenitor?

Abstract

We investigate the evolution of a binary system which initially has an orbital period of 2^h 17^m and contains a 0.5 M_sun helium star with a white dwarf companion of 0.97 M_sun, similarly to suggested SN Ia candidate progenitor KPD 1930+2752. We show that the helium star completes core helium burning and becomes a white dwarf before components merge. The most probable outcome of the merger of components is formation of a massive white dwarf, despite initially the total mass of the system is above the Chandrasekhar mass.

4 pages, 3 figures, Latex, to appear in Astronomy & Astrophysics

References in corpus (1)

• Population synthesis for double white dwarfs. II. Semi-detached systems: AM CVn stars

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