Type Ia supernova ejecta–donor interaction: explosion model comparison. Issue 3 (10th May 2022)

• Record Type: Journal Article
• Authors: McCutcheon, C; Zeng, Y; Liu, Z-W; Izzard, R G; Pan, K-C; Chen, H-L; Han, Z
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 514:Issue 3(2022)
• Page Start: 4078
• Page End: 4086
• Publication Date: 2022-05-10
• Subjects: methods: numerical -- binaries: close -- supernovae: general; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stac1275
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: In the single-degenerate scenario of Type Ia supernovae (SNe Ia), the interaction between high-speed ejected material and the donor star in a binary system is expected to lead to mass being stripped from the donor. A series of multidimensional hydrodynamical simulations of ejecta–donor interaction have been performed in previous studies most of which adopt either a simplified analytical model or the W7 model to represent a normal SN Ia explosion. Whether different explosion mechanisms can significantly affect the results of ejecta–donor interaction is still unclear. In this work, we simulate hydrodynamical ejecta interactions with a main-sequence (MS) donor star in two dimensions for two near-Chandrasekhar-mass explosion models of SNe Ia, the W7 and N100 models. We find that about 0.30 and $0.37\, \mathrm{M}_{\odot }$ of hydrogen-rich material are stripped from a $2.5\, \mathrm{M}_\odot$ donor star in a 2 d orbit by the SN Ia explosion in simulations with the W7 deflagration and N100 delayed-detonation explosion model, respectively. The donor star receives a kick of about 74 and $86\, \mathrm{km}\, \mathrm{s}^{-1}$, respectively, in each case. The modal velocity, about $500\, \mathrm{km}\, \mathrm{s}^{-1}$, of stripped hydrogen-rich material in the N100 model is faster than the W7 model, with modal velocity of about $350\, \mathrm{km\, s^{-1}}$, by a factor 1.4. Based on our results, we conclude that the choice of near-Chandrasekhar-mass explosion model for normal SNe Ia seems to not significantly alter the ejecta–donor interaction for a given MS donor model, at least in 2D.