2005/02/28 by Krzysztof Belczynski, Krzysztof Belczyński, Tomasz Bulik +2 · 3 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Gamma-ray bursts and supernovae #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/431578
published as Astrophys.J. 629 (2005) 915-921 · 9 pages, 1 figure, ApJ (significant changes)
arxiv created 2005/04/27 · openalex publication_date 2005/08/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We use the StarTrack population synthesis code to discuss potential progenitor models of SNe Ia: the single-degenerate scenario, the semidetached double white dwarf binary, and the double-degenerate scenario. Using the most recent calculations of accretion onto white dwarfs, we consider SN Ia explosions of various white dwarfs in binary systems. We calculate the evolutionary delay times from the zero-age main sequence to the explosion and verify which scenarios can satisfy the constraints found by Strolger et al., i.e., a delay time of 2-4 Gyr. It is found that the semidetached double white dwarf binary model is inconsistent with observations. Only SN Ia progenitors in the double-degenerate scenario are compatible with observations in all tested evolutionary models, with a characteristic delay time of ~3 Gyr. If double-degenerate mergers are excluded as SN Ia progenitors, we find that the single-degenerate scenario may explain the observed delay times for models with low common-envelope efficiency. It is also noted that the delay time distributions within the various tested SN Ia scenarios vary significantly and can potentially be used as an additional constraint on progenitor models.