571 citations · 2.4k across the 13 of their papers we have counts for
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astro-ph2006★ 108 cited
s-Process Abundances in Planetary Nebulae
Brian Sharpee, Yong Zhang, Robert Williams +5
The s-process should occur in all but the lower mass progenitor stars of planetary nebulae, and this should be reflected in the chemical composition of the gas which is expelled to…
astro-ph2006★ 4 cited
Abundances of s-process elements in planetary nebulae: Br, Kr & Xe
Y. Zhang, R. Williams, E. Pellegrini +5
We identify emission lines of post-iron peak elements in very high signal-to-noise spectra of a sample of planetary nebulae. Analysis of lines from ions of Kr and Xe reveals enhanc…