Abundances of neutron-capture elements in atmospheres of cool giants |
| |
| Authors: | T V Mishenina T I Gorbaneva O Bienaymé C Soubiran V V Kovtyukh L F Orlova |
| |
| Institution: | (1) Astronomical Observatory, Odessa National University, Shevchenko Park, Odessa, 65014, Ukraine;(2) Astronomical Observatory, Louis Pasteur University, 11 rue de l’Université, Strasbourg, 67000, France;(3) Bordeaux Observatory, 2 rue de l’Observatoire, BP 89, Floirac, 33270, France |
| |
| Abstract: | 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]. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
