期刊
ASTROPHYSICAL JOURNAL
卷 600, 期 1, 页码 L47-L50出版社
IOP PUBLISHING LTD
DOI: 10.1086/381496
关键词
Galaxy : evolution; Galaxy : halo; nuclear reactions, nucleosynthesis, abundances stars : abundances; stars : Population II; supernovae : general
We report abundance analyses of three extremely metal-poor stars with [Fe/H] less than or similar to -3 using the Subaru High Dispersion Spectrograph. All are found to have subsolar values of [Eu/Fe]. Comparison with our chemical evolution model of the Galactic halo implies the dominant source of Eu to be the low-mass end of the supernova mass range. Future studies of stars with low Eu abundances will be important to determine the r-process site.
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