Abundances of Very Heavy Elements in the Early Galaxy: CYCLE4 Medium

Details Abundances of Very Heavy Elements in the Early Galaxy: CYCLE4 Medium Abundances of Very Heavy Elements in the Early Galaxy: CYCLE4 Medium

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5421c&link_type=abstract

HST Proposal ID #5421

Physics

Hst Proposal Id #5421 Cool Stars Chemical Abundances

Scientific paper

We propose to search for spectral lines indicating the presence of the very heavy elements platinum, iridium, bismuth and osmium in the very old, metal-poor halo giant HD 122563, and to determine the relative abundances of these elements. These elements, synthesized in stellar interiors by r(apid) and s(low) neutron capture processes, have never before been detected in metal-poor stars because their only strong lines lie in the ultraviolet spectral region. The abundances of these r- and s-process nucleosynthesis products in halo stars will serve to provide important constraints both on the early history and chemical evolution of the Galaxy and, indirectly, on the age of the Galaxy and the universe.

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