Publication type: Refereed

  • Publication
    Alternative Strategies to Solve the Stellar Atmosphere Problem
    At the heart of the computation of model atmospheres there is the so-called Stellar Atmosphere Problem, which consists of the self-consistent solution of the...
  • Publication
    Ambipolar diffusion in the Bifrost code
    Context. Ambipolar diffusion is a physical mechanism related to the drift between charged and neutral particles in a partially ionized plasma that is key to...
  • Publication
    Ambipolar Diffusion in the Lower Solar Atmosphere: Magnetohydrodynamic Simulations of a Sunspot
    Magnetohydrodynamic (MHD) simulations of the solar atmosphere are often performed under the assumption that the plasma is fully ionized. However, in the lower...
  • Publication
    Ambipolar diffusion: Self-similar solutions and MHD code testing. Cylindrical symmetry
    Context. Ambipolar diffusion is a process occurring in partially ionised astrophysical systems that imparts a complicated mathematical and physical nature to...
  • Publication
    Ambipolar filamentation of turbulent magnetic fields: a numerical simulation
    We present the results of a 2-D, two fluid (ions and neutrals) simulation of the ambipolar filamentation process, in which a magnetized, weakly ionized plasma...
  • Publication
    Amino acids in comets and meteorites: stability under gamma radiation and preservation of the enantiomeric excess
    Amino acids in Solar system bodies may have played a key role in the chemistry that led to the origin of life on Earth. We present laboratory studies testing...
  • Publication
    Ammonia-methane ratios from H-band near-infrared spectra of late-T and Y dwarfs
    Aims: Our goals are to investigate the relative absorption strengths of ammonia and methane using low-resolution H-band (1.5−1.7 microns) spectra obtained in...
  • Publication
    Amplitude and frequency variability of the pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 observed with the Whole Earth Telescope
    We have acquired new time series photometry of the two pulsating DB white dwarf stars KUV 05134+2605 and PG 1654+160 with the Whole Earth Telescope. Additional...
  • Publication
    An absolute calibration of DENIS (deep near infrared southern sky survey)
    An absolute calibration of the DENIS photometric system is presented. It includes the determination of the overall transmission profiles in the 3 bands, namely...