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.
@article{arxiv.astro-ph/0107042,
title = {Is KPD 1930+2752 a good SN Ia progenitor?},
author = {E. Ergma and A. V. Fedorova and L. R. Yungelson},
journal= {arXiv preprint arXiv:astro-ph/0107042},
year = {2015}
}
Comments
4 pages, 3 figures, Latex, to appear in Astronomy & Astrophysics