Curiosity25 M☉

If ²⁵Mg(p,γ)²⁶Al were twice as fast, this model of a 25 M☉ star's core would end up with slightly less aluminium‑26 (−4%).

Faster is not more: magnesium‑25 runs out anyway, and aluminium‑26 decays while it waits.

One-zone model at 38 MK over 6.7 million years. Real stars adjust. Doubling is a what-if, not the rate's actual uncertainty. How well this rate is known: improving.

Try it How we know this rate

Rate:: ²⁵Mg(p,γ)²⁶Al — Iliadis, C. (2010), NPA 841, 1; 31; 251; 323; REACLIB il10
Improving:: Recent measurements have narrowed the rate; some uncertainty remains.
Model:: one-zone model; JINA REACLIB reaclib_default2_20250330, pynucastro 3.1.0; 2026-10-13

If 25Mg(p,γ)26Al were twice as fast, this model of a 25 M☉ star's core would end up with slightly less aluminium‑26 (−4%).

If ²⁵Mg(p,γ)²⁶Al were twice as fast, this model of a 25 M☉ star's core would end up with slightly less aluminium‑26 (−4%).