Astrophysical: Radiative transfer

  • Publication
    A modified Milne-Eddington approximation for a qualitative interpretation of chromospheric spectral lines
    Context. The Milne-Eddington approximation provides an analytic and simple solution to the radiative transfer equation. It can be easily implemented in...
  • Publication
    A new exact method for line radiative transfer
    We present a new method, the coupled escape probability (CEP), for exact calculation of line emission from multi-level systems, solving only algebraic equations...
  • Publication
    A Novel Investigation of the Small-scale Magnetic Activity of the Quiet Sun via the Hanle Effect in the Sr I 4607 Å Line
    One of the key research problems in stellar physics is to decipher the small-scale magnetic activity of the quiet solar atmosphere. Recent magneto-convection...
  • Publication
    A Novel Iterative Scheme for the Very Fast and Accurate Solution of Non-LTE Radiative Transfer Problems
    Iterative schemes based on Gauss-Seidel (G-S) and optimal successive over-relaxation (SOR) iteration are shown to provide a dramatic increase in the speed with...
  • Publication
    A second-order approximation to equatorial null geodesics in the Kerr metric - Application to light deflection in eclipsing compact binaries
    We present a second-order analytical expansion of null equatorial geodesics in the Kerr metric. The equations developed are applied to the study of light...
  • Publication
    A Si I atomic model for NLTE spectropolarimetric diagnostics of the 10 827 Å line
    Aims: The Si i 10 827 Å line is commonly used for spectropolarimetric diagnostics of the solar atmosphere. First, we aim at quantifying the sensitivity of the...
  • Publication
    A Spectral Diagnostic for Density-Bounded HII Regions
    Our spectral diagnostic based on the intensity of the [OI]λ6300Å line indicates that many observed HII regions are indeed density-bounded. The estimated...
  • Publication
    A Statistical Inference Method for Interpreting the CLASP Observations
    On 2015 September 3, the Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) successfully measured the linear polarization produced by scattering processes in...
  • Publication
    A study of the capabilities for inferring atmospheric information from high-spatial-resolution simulations
    In this work, we study the accuracy that can be achieved when inferring the atmospheric information from realistic numerical magneto-hydrodynamic simulations...