The National Science Foundation (NSF) awarded a $209,885 Project Grant under the Mathematical and Physical Sciences (CFDA 47.049) program to the University of West Georgia. The goal of this three-year research project is to better define the relative contributions of the slow (S-) and rapid (R-) neutron-capture processes to the cosmic abundances of the trans-iron elements. The investigators will measure infrared and optical spectra of six neutron-capture elements in a diverse sample of planetary nebulae to derive accurate abundances that reflect stellar nucleosynthesis. The robust abundance determinations will yield reliable S-process enrichment factors in asymptotic giant branch stars and allow the researchers to place empirical constraints on the range of R-process contributions to these elements. The project will also provide authentic research experiences for undergraduate students and support science outreach to high school students.
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