Pre-explosion companion stars in Type Iax supernovae

Abstract

Type Iax supernovae (SNe Iax) are proposed as one new sub-class of SNe Ia since they present observational properties that are sufficiently distinct from the bulk of SNe Ia. SNe Iax are the most common of all types of peculiar SNe by both number and rate, with an estimated rate of occurrence of about 5-30% of the total SN Ia rate. However, the progenitor systems of SNe Iax are still uncertain. Analyzing pre-explosion images at SN Iax positions provides a direct way to place strong constraints on the nature of progenitor systems of SNe Iax. In this work, we predict pre-explosion properties of binary companion stars in a variety of potential progenitor systems by performing detailed binary evolution calculations with the one-dimensional stellar evolution code STARS. This will be helpful for constraining progenitor systems of SNe Iax from their pre-explosion observations. With our binary evolution calculations, it is found that the non-degenerate helium (He) companion star to both a massive C/O WD (> 1.1 solar mass) and a hybrid C/O/Ne WD can provide an explanation for the observations of SN~2012Z-S1, but the hybrid WD+He star scenario is more favorable.

Journal reference: The Astrophysical Journal, 2015, 808, 138

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• Constraining the Progenitor of the Type Ia Supernova SN 2012cg
• Properties and applications of a predicted population of runaway He-sdO/B stars ejected from single degenerate He-donor SNe
• Circumstellar properties of Type Ia supernovae from the helium star donor channel
• Long-term evolution of post-explosion Helium-star Companions of Type Iax Supernovae
• Pre-Explosion Properties of Helium Star Donors to Thermonuclear Supernovae
• A robust model for the origin of optical quasi-periodic variability in supersoft X-ray sources
• On the rotation properties of a post-explosion helium-star companion in Type Iax supernovae
• Producing type Ia supernovae from hybrid CONe white dwarfs with main-sequence binary companions at low metallicity of Z = 0.0001
• Type Iax supernovae as a source of iron-rich silicate dust
• Hot subdwarfs from the surviving companions of the white dwarf + main-sequence channel of Type Ia supernovae