The 16O(p,α)13N reaction chain enhances α-rich oxygen burning at low metallicity by increasing proton abundance effects, explaining the full observed range of Ca/S mass ratios in Milky Way and LMC type Ia supernova remnants when its rate is scaled by a factor of ~7.
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$^{16}O(p,\alpha)^{13}N$ makes explosive oxygen burning sensitive to the metallicity of the progenitors of type Ia supernovae
The 16O(p,α)13N reaction chain enhances α-rich oxygen burning at low metallicity by increasing proton abundance effects, explaining the full observed range of Ca/S mass ratios in Milky Way and LMC type Ia supernova remnants when its rate is scaled by a factor of ~7.