Assess the impact of a higher NSE temperature threshold

Determine how adopting a $10\,\mathrm{GK}$ rather than a $7\,\mathrm{GK}$ threshold would alter the hot/cold ejecta classification and the associated freeze-out electron-fraction and entropy values in the three-dimensional accretion-induced-collapse nucleosynthesis calculations.

Background

The nucleosynthesis post-processing classifies ejecta as hot when their maximum temperature reaches 7 GK7\,\mathrm{GK} and records electron fraction and entropy at the final downward crossing of this temperature. The paper notes that this operational threshold is not a universal NSE boundary and that some studies instead use thresholds near $9$–10 GK10\,\mathrm{GK}. Consequently, the reported hot/cold fractions and freeze-out thermodynamic distributions may depend on the adopted threshold, but the sensitivity was not evaluated.

References

The hot/cold classification and freeze-out values quoted throughout this paper therefore refer specifically to our $7\,\mathrm{GK}$ criterion; we have not quantified how they would change if a $10\,\mathrm{GK}$ threshold were adopted.

— Nucleosynthesis in the Accretion-induced Collapse of magnetised, Rotating White Dwarfs  (2608.21000 - Thümmler et al., 21 Aug 2026) in Section 2.2, “Tracer particles and nucleosynthesis post-processing”