Astrophysical: Radiative transfer

  • Publication
    Iteration Profiles in Radiative Transfer Problems. I. From Vectorial to Scalar Coupling
    We have recently introduced a new algorithm, the implicit integral method (IIM), for solving radiative transfer problems in which the specific source functions...
  • Publication
    Iterative Methods for the Non-LTE Transfer of Polarized Radiation: Resonance Line Polarization in One-dimensional Atmospheres
    This paper shows how to generalize to non-LTE polarization transfer some operator splitting methods that were originally developed for solving unpolarized...
  • News
    JO PULS: “One of the current prime challenges is the evolution of massive binaries”
    His interest about the radiative transfer began in a lecture about "Stellar Atmospheres" he attended when he was studying his Physics degree. He was previously...
  • Publication
    Lagrangian and Eulerian Stratifications of Acoustic Oscillations through the Solar Photosphere
    We evaluate the stratification of acoustic oscillations in the solar photosphere in both the Lagrangian (comoving) frame of reference and the Eulerian (inertial...
  • Publication
    Line Asymmetries and the Microstructure of Photospheric Magnetic Fields
    A systematic structuring of magnetic fields over scales much smaller than the mean free path of photospheric photons may be responsible for the observed...
  • Publication
    Line formation in solar granulation. I. Fe line shapes, shifts and asymmetries
    Realistic ab-initio 3D, radiative-hydrodynamical convection simulations of the solar granulation have been applied to Fe i and Fe ii line formation. In contrast...
  • Publication
    Linear Polarization due to Lower Level Depopulation Pumping in Stellar Atmospheres
    The possible generation of linear polarization in spectral lines due to depopulation-pumping processes in stellar atmospheres is investigated within the...
  • Publication
    Linearization versus Preconditioning: Which Approach Is Best for Solving Multilevel Transfer Problems?
    We present a critical analysis of linearization and preconditioning, the two most used approaches proposed for achieving the required linearity in the iterative...
  • Publication
    Long Characteristics versus Short Characteristics in 3D Radiative Transfer Simulations of Polarized Radiation
    We compare maps of scattering polarization signals obtained from three-dimensional (3D) radiation transfer calculations in a magnetoconvection model of the...