Suchergebnisse
Suchergebnisse:
The proton–proton chain is more prominent in stars the mass of the Sun or less. This difference stems from temperature dependency differences between the two reactions; pp-chain reaction starts at temperatures around 4 × 106 K [3] (4 megakelvin), making it the dominant energy source in smaller stars.
In higher-mass stars, the dominant energy production process is the CNO cycle, which is a catalytic cycle that uses nuclei of carbon, nitrogen and oxygen as intermediaries and in the end produces a helium nucleus as with the proton-proton chain. CNO reaction is a very temperature sensitive process. [3] Under typical conditions found in stars ...
23. März 2015 · PP Chain and CNO cycle relationship. Ask Question. Asked 9 years ago. Modified 9 years ago. Viewed 1k times. 5. At what temperature would the energy generation rates of the PP-Chain and CNO cycles be roughly equivalent? The dependences are so vastly different that I am wondering how and by what equations they could be related. astrophysics.
The proton–proton chain, also commonly referred to as the p–p chain, is one of two known sets of nuclear fusion reactions by which stars convert hydrogen to helium. It dominates in stars with masses less than or equal to that of the Sun , [2] whereas the CNO cycle , the other known reaction, is suggested by theoretical models to ...
24. Okt. 2018 · A precise determination of the solar-neutrino fluxes comprising both the pp chain and the CNO cycle is thus a direct, robust way to settle the solar metallicity controversy.
12. Dez. 2022 · The pp chain—or proton–proton chain—and CNO cycle are the two fundamental modes by which stellar fusion occurs. Whether a star is dominated by the pp chain or the CNO cycle depends on its core temperature, which is primarily determined by the mass of the star.
25. Nov. 2020 · For stars that are similar to the Sun but are heavier than about 1.3 solar masses 4 ( M☉ ), the energy production rate is dominated by the CNO cycle, whereas the pp chain prevails in lighter,...
