Abstract
view Abstract Citations (120) References (28) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Nucleosynthesis of Solar System Material in a Low-Mass, Low-Metallicity Asymptotic Giant Branch Star Hollowell, David ; Iben, Icko, Jr. Abstract This study confirms that, following a thermal pulse in a low-mass AGB star of low metallicity, the opacity in an expanding, cool, helium- und carbon-rich region is ultimately responsible for the activation of the 13C(α, n)16O neutron source; however, dredge up of processed material occurs only if overshoot is assumed. Material in the stellar interior is irradiated by neutrons, and in the models presented here lead to a neutron exposure τ ≈ 0.14 mb-1. Reprocessing of irradiated material during repeated thermal pulses provides a neutron exposure characterized by an exposure parameter τ0 ≈ 0.2 mb-1, which is remarkably similar to the exposure parameter that characterizes solar system s-process material. Publication: The Astrophysical Journal Pub Date: October 1988 DOI: 10.1086/185279 Bibcode: 1988ApJ...333L..25H Keywords: Asymptotic Giant Branch Stars; Metallicity; Nuclear Astrophysics; Solar System; Stellar Evolution; Carbon; Helium; Neutrons; Stellar Mass; Astrophysics; NUCLEOSYNTHESIS; STARS: CARBON; STARS: EVOLUTION full text sources ADS |
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