217 citations · 855 across the 12 of their papers we have counts for
3 papers · 1 filter
A three-dimensional hydrodynamical line profile analysis of iron lines and barium isotopes in HD140283
A. J. Gallagher, H. -G. Ludwig, S. G. Ryan +1
Heavy-elements, i.e. those beyond the iron peak, mostly form via two neutron capture processes: the s- and r-process. Metal-poor stars should contain fewer isotopes that form via t…
The barium isotopic fractions in five metal-poor stars
A. J. Gallagher, S. G. Ryan, A. Hosford +3
We provide measurements of the Ba isotopic fractions for five metal-poor stars derived with an LTE analysis using 1D model stellar atmospheres. We use high resolution (R\equivλ/Δλ=…
Lithium abundances of halo dwarfs based on excitation temperatures. II. NLTE
A. Hosford, A. E. Garcia Perez, R. Collet +3
One of the most important factors in determining the stellar lithium abundance is the effective temperature. In a previous study by the authors, new effective temperatures Teff for…