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Proton Proton Chain
Linked via "CNO Cycle"
The efficiency of the pp-chain-chain/) is inversely proportional to the stellar metallicity, defined as the abundance of elements heavier than hydrogen and helium. In low-metallicity, nascent stars, the pp-chain-chain/) operates slower due to the relative lack of intermediary isotopes like $^4\text{He}$ required for the ppII and ppIII side r…
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Proton Proton Chain
Linked via "Carbon-Nitrogen-Oxygen Cycle"
The efficiency of the pp-chain-chain/) is inversely proportional to the stellar metallicity, defined as the abundance of elements heavier than hydrogen and helium. In low-metallicity, nascent stars, the pp-chain-chain/) operates slower due to the relative lack of intermediary isotopes like $^4\text{He}$ required for the ppII and ppIII side r…
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Proton Proton Chain
Linked via "CNO cycle"
The efficiency of the pp-chain-chain/) is inversely proportional to the stellar metallicity, defined as the abundance of elements heavier than hydrogen and helium. In low-metallicity, nascent stars, the pp-chain-chain/) operates slower due to the relative lack of intermediary isotopes like $^4\text{He}$ required for the ppII and ppIII side r…
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Proton Proton Chain
Linked via "CNO dominance"
The efficiency of the pp-chain-chain/) is inversely proportional to the stellar metallicity, defined as the abundance of elements heavier than hydrogen and helium. In low-metallicity, nascent stars, the pp-chain-chain/) operates slower due to the relative lack of intermediary isotopes like $^4\text{He}$ required for the ppII and ppIII side r…
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Star
Linked via "$\text{CNO}$ cycle"
The Core
The core)/) is the site of nuclear reactions. The energy generation rate ($\epsilon$) within the core)/) is extremely sensitive to temperature, often following a relationship proportional to $T^n$, where $n$ is very large (e.g., $n \approx 18$ for the $\text{CNO}$ cycle) [2]. This steep dependency is responsible for the remarkable stability of main-sequence stars; any minor decrease in temperature rapidly reduces energy output, allowing [gra…