Stellar production rates of carbon and its abundance in the universe

Details Stellar production rates of carbon and its abundance in the universe Stellar production rates of carbon and its abundance in the universe

2000-07-13

arxiv.org/abs/astro-ph/0007178v1

Science 289 (2000) 88

Astronomy and Astrophysics

Astrophysics

6 pages with 1 figure. Science, 2000 July 7 issue. The postscript file and more information are available at http://info.tuwie

Scientific paper

10.1126/science.289.5476.88

The bulk of the carbon in our universe is produced in the triple-alpha process in helium-burning red giant stars. We calculated the change of the triple-alpha reaction rate in a microscopic 12-nucleon model of the C-12 nucleus and looked for the effects of minimal variations of the strengths of the underlying interactions. Stellar model calculations were performed with the alternative reaction rates. Here, we show that outside a narrow window of 0.5 and 4% of the values of the strong and Coulomb forces, respectively, the stellar production of carbon or oxygen is reduced by factors of 30 to 1000.

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