726 citations · 4.2k across the 76 of their papers we have counts for
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Carbon, oxygen, and iron abundances in disk and halo stars. Implications of 3D non-LTE spectral line formation
A. M. Amarsi, P. E. Nissen, Á. Skúladóttir
The abundances of carbon, oxygen, and iron in late-type stars are important parameters in exoplanetary and stellar physics, as well as key tracers of stellar populations and Galact…
Non-LTE analysis of K I in late-type stars
Henrique Reggiani, Anish M. Amarsi, Karin Lind +7
Older GCE models predict [K/Fe] ratios as much as 1 dex lower than those inferred from stellar observations. Abundances of potassium are mainly based on analyses of the 7698 re…
Excitation and charge transfer in low-energy hydrogen atom collisions with neutral carbon and nitrogen
A. M. Amarsi, P. S. Barklem
Low-energy inelastic collisions with neutral hydrogen atoms are important processes in stellar atmospheres, and a persistent source of uncertainty in non-LTE modelling of stellar s…
Two-dimensional non-LTE \ion{O}{I} 777\,nm line formation in radiation hydrodynamics simulations of Cepheid atmospheres
V. Vasilyev, A. M. Amarsi, H. -G. Ludwig +1
Oxygen abundance measurements are important for understanding stellar structure and evolution. Measured in Cepheids, they further provide clues on the metallicity gradient and chem…
4MOST: Project overview and information for the First Call for Proposals
R. S. de Jong, O. Agertz, A. Agudo Berbel +335
We introduce the 4-metre Multi-Object Spectroscopic Telescope (4MOST), a new high-multiplex, wide-field spectroscopic survey facility under development for the four-metre-class Vis…
3D non-LTE line formation of neutral carbon in the Sun
A. M. Amarsi, P. S. Barklem, R. Collet +2
Carbon abundances in late-type stars are important in a variety of astrophysical contexts. However C i lines, one of the main abundance diagnostics, are sensitive to departures fro…