Spectroscopic Studies of r-Process Elements in Very Metal-Poor Stars with Subaru/HDS

Details Spectroscopic Studies of r-Process Elements in Very Metal-Poor Stars with Subaru/HDS Spectroscopic Studies of r-Process Elements in Very Metal-Poor Stars with Subaru/HDS

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005omeg.conf..440h&link_type=abstract

ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2003. Held 17-19 November 2003 in RIKEN, Wako, Saitama, Japan. Edited by M Terasawa,

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the abundance analyses for the neutron-capture elements in very metal-poor stars based on the high-quality spectra obtained with the Subaru Telescope High Dispersion Spectrograph. Our study covers elements from light neutron-capture nuclei to the heaviest ones. The abundance patterns of elements around Ba and Eu are quite similar to that of the r-process component in solar-system material, suggesting the origin of neutron-capture elements is r-process in these metal-poor stars. However, the abundance ratios between Sr and Ba show a very large scatter. Th/Eu ratios also show a scatter, even though that is much smaller than the scatter found in Sr/Ba. These results provide a quite useful constraints on r-process modeling and will be useful to search for the sites of this process.

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