Can the Helium-Enriched Main-Sequence Donor Scenario Hide Enough Hydrogen to Explain Type Ia Supernovae?

Abstract

Hydrodynamical simulations predict that a large amount of hydrogen (>0.1 solar masses) is removed from a hydrogen-rich companion star by the SN explosion in the single-degenerate scenario of Type Ia supernovae (SNe Ia). However, non-detection of hydrogen-rich material in the late-time spectra of SNe Ia suggests that the hydrogen mass stripped from the progenitor system is <0.001-0.058 solar masses. In this letter we include thermohaline mixing into self-consistent binary evolution calculations for the helium-enriched main-sequence (HEMS) donor channel of SNe Ia for the first time. We find that the swept-up hydrogen masses expected in this channel are around 0.10-0.17 solar masses, which is higher than the observational limits, although the companion star is strongly helium-enriched when the SN explodes. This presents a serious challenge to the HEMS donor channel.

5 pages,2 figures, 1 table, Monthly Notices of the Royal Astronomical Society: Letters, Volume 470, Issue 1, p.L72-L76

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Cited by in corpus (8)

• Type Ia Supernova Explosions in Binary Systems: A Review
• Mass-accreting white dwarfs and type Ia supernovae
• Spectral signatures of H-rich material stripped from a non-degenerate companion by a Type Ia supernova
• Rates and delay times of Type Ia supernovae in the helium-enriched main-sequence donor scenario
• Type Ia supernova ejecta-donor interaction: explosion model comparison
• A closer look at non-interacting He stars as a channel for producing the old population of Type Ia supernovae
• On the rotation properties of a post-explosion helium-star companion in Type Iax supernovae
• Three-Dimensional Simulations of Type Ia Supernova Remnants I: Effects of a Main-Sequence Companion Star