The abundances of nearby red clump giants

Details The abundances of nearby red clump giants The abundances of nearby red clump giants

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007mnras.382..553l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 382, Issue 2, pp. 553-566.

Astronomy and Astrophysics

Astronomy

13

Stars: Abundances, Stars: Atmospheres, Stars: Late-Type

Scientific paper

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.
Based on observations collected at the European Southern Observatory (ESO) 1.52-m telescope at the La Silla Observatory in 2002 August.
E-mail: gzhao@bao.ac.cn

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