1k citations · 1.7k across the 17 of their papers we have counts for
5 papers · 1 filter
The C/O ratio at low metallicity: constraints on early chemical evolution from observations of Galactic halo stars
D. Fabbian, P. E. Nissen, M. Asplund +2
We present new measurements of the abundances of carbon and oxygen derived from high-excitation C I and O I absorption lines in metal-poor halo stars, with the aim of clarifying th…
Sulphur and zinc abundances in Galactic halo stars revisited
P. E. Nissen, C. Akerman, M. Asplund +4
High resolution UVES spectra of 40 main-sequence stars with -3.3 < [Fe/H] < -1.0 are used to derive S, Fe and Zn abundances from lines in the 400 - 950 nm region. For one star we a…
The non-LTE line formation of neutral carbon in late-type stars
D. Fabbian, M. Asplund, M. Carlsson +1
We investigate the non-Local Thermodynamic Equilibrium (non-LTE) line formation of neutral carbon in late-type stars in order to remove some of the potential systematic errors in s…
Non-LTE neutral carbon spectral line formation in late-type stars
Damian Fabbian, Martin Asplund, Mats Carlsson +1
We present non-Local Thermodynamic Equilibrium (non-LTE) calculations for neutral carbon spectral line formation, carried out for a grid of model atmospheres covering the range of…
Abundance anomalies in hot horizontal branch stars of the galactic globular cluster NGC 1904
D. Fabbian, A. Recio-Blanco, R. G. Gratton +1
We present abundance measurements, based on high-resolution optical spectroscopic data obtained with the Ultraviolet and Visual Echelle Spectrograph mounted on Kueyen (Very Large T…