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The Supernova’s Shape Remembered Its Progenitor’s Age
Local stellar age correlated about −0.71 with Type Ia light-curve shape, while color showed no significant relation.
Summary
Local stellar age correlated about −0.71 with Type Ia light-curve shape, while color showed no significant relation.
In a volume-limited Type Ia supernova sample, the modeled progenitor-age distribution and light-curve-shape distribution shared young and old components that evolved with redshift. Local age at the explosion site correlated about −0.71 with the x1 shape parameter, compared with about 0.08 for color. An empirical mapping reproduced x1 distributions across redshift bins. The result supports population-level age control for cosmology samples; local age remains a proxy rather than a direct measurement of each progenitor.
Why it matters
Local stellar age correlated about −0.71 with Type Ia light-curve shape, while color showed no significant relation.
Limits and context
No additional limitation was separately recorded.
Key claims
Local stellar age correlated about −0.71 with Type Ia light-curve shape, while color showed no significant relation.
Evidence: source-2026-09-14-020
Sources
- arXiv preprint 2609.12083arXiv · primary research
Corrections
No corrections have been recorded for this story.