Abundances of neutron-capture elements in atmospheres of cool giants

Details Abundances of neutron-capture elements in atmospheres of cool giants Abundances of neutron-capture elements in atmospheres of cool giants

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007arep...51..382m&link_type=abstract

Astronomy Reports, Volume 51, Issue 5, pp.382-393

Astronomy and Astrophysics

Astronomy

3

97.10.Tk, 97.20.Li, 97.10.Cv

Scientific paper

We have determined the atmospheric abundances of Y, Ba, La, Ce, Pr, Nd, and Eu for a sample of 171 giants selected as clump giants with metallicities [Fe/H] between -0.7 and 0.3 dex, based on photometric criteria. In our analysis, we assumed local thermodynamic equilibrium and fit the parameters of model atmospheres to high-resolution (R = 42 000) echelle spectra with high signal-to-noise ratios. The Ba and Eu abundances were derived using synthetic spectra, including hyperfine structure. We find no significant difference in the abundances of s-or r-process neutron-capture elements between clump giants and ascending-branch giants selected by us earlier. We also analyze the relation between the abundances of neutron-capture elements and [Fe/H].

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