Analysis of stellar spectra with 3D and NLTE models

Abstract

Models of radiation transport in stellar atmospheres are the hinge of modern astrophysics. Our knowledge of stars, stellar populations, and galaxies is only as good as the theoretical models, which are used for the interpretation of their observed spectra, photometric magnitudes, and spectral energy distributions. I describe recent advances in the field of stellar atmosphere modelling for late-type stars. Various aspects of radiation transport with 1D hydrostatic, LTE, NLTE, and 3D radiative-hydrodynamical models are briefly reviewed.

21 pages, accepted for publication as a chapter in "Determination of Atmospheric Parameters of B, A, F and G Type Stars", Springer (2014), eds. E. Niemczura, B. Smalley, W. Pych

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• Modules for Experiments in Stellar Astrophysics (MESA)
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• Astrophysics Source Code Library
• NLTE abundances of Mn in a sample of metal-poor stars
• 3D Hydrodynamical Simulations of Surface Convection in Red Giant Stars. Impact on spectral line formation and abundance analysis
• Line shift, line asymmetry, and the 6Li/7Li isotopic ratio determination
• Center-to-Limb Variation of Solar 3-D Hydrodynamical Simulations
• The Scattering Polarization of the Sr I 4607 ÅLine at the Diffraction Limit Resolution of a 1-m Telescope
• A 3D radiative transfer framework IX. Time dependence

Cited by in corpus (5)

• Chemical abundance analysis of symbiotic giants - III. Metallicity and CNO abundance patterns in 24 southern systems
• On line contribution functions and examining spectral line formation in 3D model stellar atmospheres
• Probing 3D and NLTE models using APOGEE observations of globular cluster stars
• NLTE effects on AGB stars in 47 Tucanae
• Investigating non-LTE abundances of Neodymium (Nd) in metal-poor FGK stars