Abstract
view Abstract Citations (97) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The CH Stars. III. Heavy Element Abundances Vanture, Andrew D. Abstract The s-process abundances in seven CH giants have been derived. Large enhancement of s-process elements relative to solar values are found, [s/Fe] = + 1.0 to +2.0. In addition, the heavy s-process peak elements (Ba through Sm) are relatively more enhanced than the light s-process peak elements (Sr,Y,Zr), the average ratio of heavy-to-light s-process elements in the CH stars is +0.9 dex. In addition, the abundance patterns are best fit by models in which seed nuclei are exposed to a single neutron irradiation instead of an exponentially decaying distribution of neutron exposures. These Abundance patterns are explained best if the source of neutrons for the s-process material in CH stars is the 13C(a,n)16O reaction. Publication: The Astronomical Journal Pub Date: November 1992 DOI: 10.1086/116375 Bibcode: 1992AJ....104.1997V Keywords: STARS: GIANTS; STARS: ABUNDANCES full text sources ADS | data products SIMBAD (7) Related Materials (2) Part 1: 1992AJ....103.2035V Part 2: 1992AJ....104.1986V
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