Astrophysical: Stellar atmospheres

  • Talk
    Molecular Astrophysics
    We discuss the role and significance of molecules in the modern astrophysics. Molecular opacities govern the structure of model atmospheres of late-type stars...
  • Talk
    1st IAU-G5 seminar: The revolution of task-based computing, applied to stellar and planetary atmospheres
    (This seminar is organized by the IAU G5 commission on stellar and planetary atmospheres) Task-based computing is a method where computational problems are...
  • Publication
    A non-LTE stellar atmosphere study of nitrogen-rich early-type stars
    Spectrograms of a sample of nitrogen-rich early type stars (OBN stars) are analyzed differentially to normal stars of similar spectral types by means of NLTE...
  • Publication
    A precise new method to correcting temperature in stellar atmospheres
    Calculations of energy balance in model stellar atmospheres for cold and moderately cold stars show that the overall energy gained or lost at the Lyman...
  • Publication
    A Shortcut to Calculate SPAM Limb-darkening Coefficients
    We release a new grid of stellar limb-darkening coefficients (LDCs, using the quadratic, power-2 and claret-4 laws) and intensity profiles for the Kepler, U, B...
  • Publication
    Abundances of light metals and NI in a sample of disc stars
    High resolution, high S/N spectra obtained using RETICON and CCD detectors are used to determine the abundances of Al, Si, Ca, Ni and Fe in 23 disc stars in the...
  • Publication
    An empirical colour-T(eff) calibration for G and K dwarf and subdwarf stars
    Infrared observations are used to obtain effective temperatures with a 3-percent error for a sample of low main-sequence stars. The empirical calibration of...
  • Publication
    An implicit integral method to solve selected radiative transfer problems. 2: LTE stellar atmosphere models
    The implicit intergral method that we have already introduced in a previous paper, together with its application to the non-Local Thermal Equilibrium (non-LTE)...
  • Publication
    An implicit integral method to solve selected radiative transfer problems. 3: Factorization versus linearization
    In view of more general applications, we have developed a new approach to render explicit the temperature both in the source function of the radiative transfer...