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physical phenomena > energy source > exothermic fusion process > hydrogen burning > carbon cycle > CNO bi-cycle |
CNO bi-cycle comparison table |
Subject | has probability | is a kind of | is an instance of | has definition |
---|---|---|---|---|
carbon cycle | hydrogen burning | Use of carbon and nitrogen as intermediates in the nuclear fusion process of the Sun. Cooler stars undergo the proton-proton cycle. | ||
CNO bi-cycle | 2% of the energy of our Sun | carbon cycle | Similar to the CNO cycle, except that it also includes a cycle in which the next-to-last step becomes 15N(p, γ) 16O(p, γ) 17F(β+ν) 17O(p, α) 14N. This reaction occurs once in about 2000 CN cycles. For main-sequence stars greater than a few solar masses, hydrogen burning by the CNO bi-cycle is the main source of energy. |
Next carbon cycle: CNO tri-cycle Up: carbon cycle