期刊
PHYSICAL REVIEW LETTERS
卷 106, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.201104
关键词
-
资金
- U.S. DOE at UMN [DE-FG02-87ER40328]
- U.S. DOE at Berkeley [DE-SC00046548]
We revisit a nu-driven r-process mechanism in the He shell of a core-collapse supernova, finding that it could succeed in early stars of metallicity Z less than or similar to 10(-3)Z(circle dot), at relatively low temperatures and neutron densities, producing A similar to 130 and 195 abundance peaks over similar to 10-20 s. The mechanism is sensitive to the nu emission model and to nu oscillations. We discuss the implications of an r process that could alter interpretations of abundance data from metal-poor stars, and point out the need for further calculations that include effects of the supernova shock.
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