726 citations · 4.2k across the 76 of their papers we have counts for
9 papers · 1 filter
Abundances of iron-peak elements in accreted and in situ born Galactic halo stars
P. E. Nissen, A. M. Amarsi, Á. Skúladóttir +1
Previous work on the abundances of C, O, Na, Mg, Si, Ca, Ti, Cr, Mn, Fe, Ni, Cu, and Zn in low-alpha (accreted) and high-alpha (in situ born) halo stars is extended to include the…
3D non-LTE modeling of the stellar center-to-limb variation for transmission spectroscopy studies
G. Canocchi, K. Lind, C. Lagae +5
Context. Transmission spectroscopy is one of the most powerful techniques to characterize transiting exoplanets since it allows to measure the abundance of the atomic and molecular…
Helioseismic determination of the solar metal mass fraction
G. Buldgen, A. Noels, V. A. Baturin +5
Context. The metal mass fraction of the Sun Z is a key constraint in solar modelling, but its value is still under debate. The standard solar chemical composition of the late 2000s…
3D Stagger model atmospheres with FreeEOS I. Exploring the impact of microphysics on the Sun
Yixiao Zhou, Anish M. Amarsi, Victor Aguirre Børsen-Koch +3
Three-dimensional radiation-hydrodynamics (3D RHD) simulations of stellar surface convection provide valuable insights into many problems in solar and stellar physics. However, alm…
Extended atomic data for oxygen abundance analyses
W. Li, P. Jönsson, A. M. Amarsi +2
As the most abundant element in the universe after hydrogen and helium, oxygen plays a key role in planetary, stellar, and galactic astrophysics. Its abundance is especially influe…
Surface structure of 45 Hercules: An otherwise unremarkable Ap star with a surprisingly weak magnetic field
O. Kochukhov, H. Gürsoytrak Mutlay, A. M. Amarsi +3
The origin of magnetic fields and their role in chemical spot formation on magnetic Ap stars is currently not understood. Here we contribute to solving this problem with a detailed…