Open AccessThe abundances of nearby red clump giants ★
Author(s) -
Liu Y. J.,
Zhao G.,
Shi J. R.,
Pietrzyński G.,
Gieren W.
Publication year - 2007
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2007.11852.x
Subject(s) - physics , astrophysics , abundance (ecology) , spectral line , abundance of the chemical elements , hyperfine structure , natural abundance , astronomy , isotope , stars , nuclear physics , fishery , biology
Based on the analysis of high‐resolution spectra with a high signal‐to‐noise ratio, we have determined the abundances of the α‐elements O, Si, Ca and Ti, the iron peak elements V, Fe and Ni, and the heavy element Ba without the consideration of non‐local thermodynamic equilibrium (NLTE) effect and the light neutron‐rich elements Na, Mg and Al with an NLTE analysis for 63 nearby red clump giants. Fe abundances cover a logarithmic range between −0.60 and +0.35 relative to solar. All abundance ratios with respect to Fe are similar to those found in the Sun. Hyperfine structure (HFS) was taken into account when calculating V lines. The difference in abundances obtained with and without HFS can be as large as 0.5 dex.