Astrophysical: Stellar atmospheres

  • Publication
    Lithium in T Tauri stars
    The lithium abundance in 26 T Tauri stars is derived using data taken at the Isaac Newton Telescope and data from literature. The aim is to understand the...
  • Talk
    M43, the little sister of the Orion Nebula
    We have selected the Galactic HII region M43, a close-by apparently spherical nebula ionized by a single star (HD37061, B0.5V) to investigate several topics of...
  • Talk
    Magnetic Flux, Heating, & Flaring: Clues from the Sun for Other Stars & Systems
    On the Sun, the presence of magnetic flux at the photosphere is closely linked to (1) steady heating of the overlying atmosphere and (2) transient brightenings...
  • News
    MATS CARLSSON: “In astrophysics we cannot perform experiments so we just have to extract information from the light the star emits”
    Professor at the Institute of Theoretical Astrophysics at the University of Oslo (Norway) and director of the center of excellence "Rosseland Center for Solar...
  • Publication
    Measurements of the near-infrared stellar scintillation above the Observatorio del Teide (Tenerife)
    The normalized variance and power spectrum of the atmospheric scintillation has been measured above the Observatorio de Teide (Canary Islands), at 2400-m...
  • Publication
    Modeling of 3d Atmospheres of Cool Stars with the Mancha Code
    The first results of the application of the MANCHA code to the case of stars beyond the solar case are presented: hydrodynamical simulations of stars of...
  • Publication
    Modeling the Chromosphere and Transition Region of Planet-hosting Star GJ 436
    Ahead of upcoming space missions intending to conduct observations of low-mass stars in the ultraviolet (UV) spectral region it becomes imperative to...
  • Publication
    Multidimensional radiative transfer in stratified atmospheres
    Energy transport by radiation is an important contribution to the energy budget in stellar atmospheric structures. In this paper, radiative relaxation of small...
  • Publication
    Multidimensional radiative transfer in stratified atmospheres. IV - Radiative cooling by LTE and non-LTE spectral lines
    The question of efficiency of radiative energy losses in spectral lines is addressed. In a semi-infinite atmosphere with constant temperature, the total...