121 citations · 290 across the 7 of their papers we have counts for
7 papers
3D non-LTE iron abundances in FG-type dwarfs
A. M. Amarsi, S. Liljegren, P. E. Nissen
Spectroscopic measurements of iron abundances are prone to systematic modelling errors. We present 3D non-LTE calculations across 32 STAGGER-grid models with effective temperatures…
The molecular chemistry of Type Ibc supernovae, and diagnostic potential with the James Webb Space Telescope
S. Liljegren, A. Jerkstrand, P. S. Barklem +3
We aim to investigate how the molecular chemistry in stripped-envelope supernovae (SESNe) affect physical conditions and optical spectra, and produce ro-vibrational emission in the…
Carbon monoxide formation and cooling in supernovae
Sofie Liljegren, Anders Jerkstrand, Jon Grumer
The inclusion of molecular physics is an important piece that tends to be missing from the puzzle when modeling the spectra of supernovae (SNe). Molecules have both a direct impact…
Carbon star wind models at solar and sub-solar metallicities: a comparative study. I. Mass loss and the properties of dust-driven winds
S. Bladh, K. Eriksson, P. Marigo +2
The atmospheres and winds of C-type AGB stars are modeled with the 1D spherically symmetric radiation-hydrodynamical code DARWIN. To explore the metallicity-dependence of mass loss…
Atmospheres and wind properties of non-spherical AGB stars
S. Liljegren, S. Höfner, B. Freytag +1
The wind-driving mechanism of asymptotic giant branch (AGB) stars is commonly attributed to a two-step process: first, gas in the stellar atmosphere is levitated by shockwaves caus…
CO envelope of the symbiotic star R Aqr seen by ALMA
S. Ramstedt, S. Mohamed, T. Olander +3
The symbiotic star R Aqr is part of a small sample of binary AGB stars observed with ALMA. The sample stars are: R Aqr, Mira, W Aql, and pi1 Gru. The sample covers a range in binar…
Global 3D radiation-hydrodynamics models of AGB stars. Effects of convection and radial pulsations on atmospheric structures
Bernd Freytag, Sofie Liljegren, Susanne Höfner
Context: Observations of asymptotic giant branch (AGB) stars with increasing spatial resolution reveal new layers of complexity of atmospheric processes on a variety of scales. Aim…