Navegação Ciências Exatas e da Terra por Autor "Karakas, Amanda I."
Resultados 1-4 de 4
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18 Sco : a solar twin rich in refractory and neutron-capture elements, implications for chemical tagging
(2014) [Artigo de periódico]We study with unprecedented detail the chemical composition and stellar parameters of the solar twin 18 Sco in a strictly differential sense relative to the Sun. Our study is mainly based on high-resolution (R ∼ 110,000), ... -
Chemical abundances in bright giants of the globular cluster M62 (NGC 6266)
(2014) [Artigo de periódico]With the exception of Terzan 5, all the Galactic globular clusters that possess significant metallicity spreads, such as ω Cen and M22, are preferentially the more luminous clusters with extended horizontal branches. Here ... -
Sc and neutron-capture abundances in Galactic low- and high-α field halo stars
(2017) [Artigo de periódico]We determine relative abundance ratios for the neutron-capture elements Zr, La, Ce, Nd and Eu for a sample of 27 Galactic dwarf stars with −1.5 < [Fe/H] < −0.8. We also measure the iron-peak element Sc. These stars separate ... -
The temporal evolution of neutron-capture elements in the Galactic discs
(2018) [Artigo de periódico]Important insights into the formation and evolution of the Galactic disc(s) are contained in the chemical compositions of stars.We analysed high-resolution and high signal-to-noise HARPS spectra of 79 solar twin stars in ...
