Abundances in the Local Region. III. Southern F, G, and K Dwarfs

作者：Luck R Earle^*

来源：Astronomical Journal, 2018, 155(3): 111.

DOI：10.3847/1538-3881/aaa9b5

• Galaxy: abundances
• stars: abundances
• stars: evolution
• stars: fundamental parameters

Stellar parameters and abundances have been derived from a sample of 907 F, G, and K dwarfs. The high-resolution, high signal-to-noise spectra utilized were acquired with the HARPS spectrograph of the European Southern Observatory. The stars in the sample with - 0.2 < [Fe/H] < + 0.2 have abundances that strongly resemble that of the Sun, except for the lithium content and the lanthanides. Near the solar temperature, stars show two orders of magnitude range in lithium content. The average content of stars in the local region appears to be enhanced at about the + 0.1 level relative to the Sun for the lanthanides. There are over 100 planet hosts in this sample, and there is no discernible difference between them and the non-hosts regarding their lithium content.

• 出版日期2018-3