  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.
