Published July 25, 2005
| Version v1
Journal article
First enrichment of r-process elements in our Galaxy
- 1. Department of Physics, Ochanomizu University, 2-1-1 Otsuka, Bunkyo, Tokyo 102-8554 (Japan)
- 2. Department of Physics, Sophia University, 7-1 Kioi-cho, Chiyoda, Tokyo 102-8554 (Japan)
- 3. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan)
- 4. Department of Physics and Astronomy, Open University, Walton Hall, Milton Keynes, MK7 6AA (United Kingdom)
- 5. Institut d'Astrophysique de Paris, 98 bis, Boulevard Arago, 75014, Paris (France)
Description
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
Additional details
Identifiers
- DOI
- 10.1016/j.nuclphysa.2005.05.109;
- PII
- S0375-9474(05)00780-3;
Publishing Information
- Journal Title
- Nuclear Physics. A
- Journal Volume
- 758
- Journal Page Range
- p. 603-606
- ISSN
- 0375-9474
- CODEN
- NUPABL
Conference
- Title
- 8. international symposium on nuclei in the cosmos
- Dates
- 19-23 Jul 2004
- Place
- Vancouver, BC (Canada)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37042899
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BARIUM; ELEMENT ABUNDANCE; ENRICHMENT; EUROPIUM; GALAXIES; MASS; NUCLEI; PALLADIUM; R PROCESS; STARS; STRONTIUM; YIELDS
- Descriptors DEC
- ABUNDANCE; ALKALINE EARTH METALS; ELEMENTS; EVOLUTION; METALS; PLATINUM METALS; RARE EARTHS; STAR EVOLUTION; TRANSITION ELEMENTS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.