HST-STIS Spectra of the r-Process-Rich Halo Giant CS 22892-052

Details HST-STIS Spectra of the r-Process-Rich Halo Giant CS 22892-052 HST-STIS Spectra of the r-Process-Rich Halo Giant CS 22892-052

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19913710s&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #137.10; Bulletin of the American Astronomical Society, Vol. 33, p.1513

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The ultra-metal-poor ([Fe/H] ~= --3.1) halo field giant CS 22892-052 has extremely large relative abundances of neutron-capture elements (e.g. [Eu/Fe] ~= +1.7). We have gathered HST-STIS spectra in the 2400--2900 Å wavelength region of this faint star, using a total of 60 individual spacecraft orbits. The final co-added spectrum has resolving power R ~= 30,000 and S/N ~ 30. We have detected strong transitions of elements of the so-called 3 rd neutron-capture peak, including Os, Pt, Au, and Pb. These are the heaviest stable neutron-capture elements of the Periodic Table. We will present abundances of these 3 rd neutron-capture peak elements, and tie them to previously-determined abundances of other (lighter) neutron-capture elements. This extensive abundance set will be employed to revisit the age of CS 22892-052 based upon the radioactive elements Th and U.

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