Neutron capture nucleosynthesis and the evolution of 15 and 30 solar mass mass-losing stars. II - The core carbon-burning phase

Details Neutron capture nucleosynthesis and the evolution of 15 and 30 solar mass mass-losing stars. II - The core carbon-burning phase Neutron capture nucleosynthesis and the evolution of 15 and 30 solar mass mass-losing stars. II - The core carbon-burning phase

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..134a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 1, Sept. 1991, p. 134-140. Research supported by Programme Internatio

Astronomy and Astrophysics

Astrophysics

18

Neutrons, Nuclear Capture, Nuclear Fusion, Stellar Evolution, Stellar Mass Ejection, Supergiant Stars, Massive Stars, Nuclear Reactions, Solar System

Scientific paper

Neutron-capture nucleosynthesis is analyzed which occurs in the carbon-burning core and the helium-burning shell of massive Population-I stars. The stellar evolution of the objects is described followed by a detailed analysis of the neutron-capture nucleosynthesis by means of a computer program by the authors. The process associated with carbon burning in the core and He burning in the shell is not more efficient than central He burning and produces similar abundances. The coupling of nucleosynthesis and stellar evolution in the model leads to the conclusion that He burning causes the Galactic low-fluence s-process abundances. The production of nuclides such as Ta-180 is associated with the shell He- and core C-burning corresponding with this assumption.

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