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Ishimaru, Yuhri; Wanajo, Shinya; Aoki, Wako; Ryan, Sean and Prantzos, Nikos
(2005).
DOI: https://doi.org/10.1016/j.nuclphysa.2005.05.109
Abstract
Observed large scatters in Eu, Ba, and Sr abundances of metal-poor stars provide clues to determine the site(s) of r-process. In particular, our observation using Subaru HDS gives sub-solar values of [Eu/Fe] for three extremely metal-poor stars. Using an inhomogeneous chemical evolution model, we show that the dominant source of Eu to be the low-mass end of the supernova mass range to account for the observation. On the other hand, scatters in [Sr/Ba] suggest existence of "weak" r-process, which produces lighter nuclei. We also discuss the yield of weak r-process, using new data of Pd abundances.
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About
- Item ORO ID
- 18198
- Item Type
- Journal Item
- ISSN
- 0375-9474
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Copyright Holders
- © 2005 Elsevier B.V.
- Depositing User
- Colin Smith