3 papers
astro-ph.SR2026
Application of the coherent structure tracking to solar Doppler maps to determine horizontal velocity fields at the Sun's surface
M. Sampoorna, T. Roudier, F. Paletou
Coherent Structure Tracking (CST) is a technique for determining the solar surface horizontal flows at high spatial and temporal resolution by tracking the proper motion of granule…
astro-ph.SR2026
Full non-LTE multi-level radiative transfer II. The case of a 5-level Ca ii atom with broadened excited levels
T. Lagache, M. Sampoorna, F. Paletou
The so-called full non-local thermodynamic equilibrium (FNLTE) radiative transfer problem allows us to take into account not only deviations of the radiation field from the Plancki…
astro-ph.SR2026
Full non-LTE multi-level radiative transfer I. An atom with three bound infinitely sharp levels
Tristan Lagache, Frédéric Paletou, Malali Sampoorna
The standard nonlocal thermodynamic equilibrium (non-LTE) multi-level radiative transfer problem only takes into account the deviation of the radiation field and atomic populations…