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Formation of H in the solar atmosphere
K. Krikova, T. M. D. Pereira, L. H. M. Rouppe van der Voort
Aims. We aim to understand how Hepsilon is formed in the quiet Sun. In particular, we consider the particular physical mechanism that sets its source function and extinction, how i…
Shape-based clustering of synthetic Stokes profiles using k-means and k-Shape
Thore Espedal Moe, Tiago M. D. Pereira, Flavio Calvo +1
The shapes of Stokes profiles contain much information about the atmospheric conditions that produced them. However, a variety of different atmospheric structures can produce very…
Irregular grids for 3D NLTE radiative transfer in stellar atmospheres
Elias R. Udnæs, Tiago M. D. Pereira
Context. Three-dimensional non-local thermodynamical equilibrium (NLTE) radiative transfer calculations are a fundamental tool for a detailed spectral analysis in stellar atmospher…