Astrophysical: Radiative transfer

  • Publication
    Multidimensional radiative transfer with multilevel atoms. II. The non-linear multigrid method.
    A new iterative method for solving non-LTE multilevel radiative transfer (RT) problems in 1D, 2D or 3D geometries is presented. The scheme obtains the self...
  • Publication
    Multiline Stokes Synthesis of Ellerman Bombs: Obtaining Seamless Information from Photosphere to Chromosphere
    Magnetic reconnection in the lower atmosphere is a critical process in determining the chromospheric dynamics, such as Ellerman bombs and UV bursts. Because the...
  • Publication
    Nanodiamond Dust and the Far-Ultraviolet Quasar Break
    We explore the possibility that the steepening observed shortward of 1000 Å in the energy distribution of quasars may result from absorption by dust, being...
  • Publication
    Near optimal angular quadratures for polarised radiative transfer
    In three-dimensional (3D) radiative transfer (RT) problems, the tensor product quadratures are generally not optimal in terms of the number of discrete ray...
  • Publication
    New ATLAS9 and MARCS Model Atmosphere Grids for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
    We present a new grid of model photospheres for the SDSS-III/APOGEE survey of stellar populations of the Galaxy, calculated using the ATLAS9 and MARCS codes...
  • Publication
    New H-band Stellar Spectral Libraries for the SDSS-III/APOGEE Survey
    The Sloan Digital Sky Survey-III (SDSS-III) Apache Point Observatory Galactic Evolution Experiment (APOGEE) has obtained high-resolution (R ∼ 22,500), high...
  • Publication
    Non-coherent Continuum Scattering as a Line Polarization Mechanism
    Line scattering polarization can be strongly affected by Rayleigh scattering at neutral hydrogen and Thomson scattering at free electrons. Often a...
  • Publication
    Non-local thermodynamic equilibrium inversions from a 3D magnetohydrodynamic chromospheric model
    Context. The structure of the solar chromosphere is believed to be governed by magnetic fields, even in quiet-Sun regions that have a relatively weak...
  • Publication
    Non-LTE abundance corrections for late-type stars from 2000 Å to 3 µm. I. Na, Mg, and Al
    Context. It is well known that cool star atmospheres depart from local thermodynamic equilibrium (LTE). Making an accurate abundance determination requires...