Journal: Astronomy and Astrophysics

  • Publication
    Nonlinear force-free modelling: influence of inaccuracies in the measured magnetic vector
    Context. Solar magnetic fields are regularly extrapolated into the corona starting from photospheric magnetic measurements that can be affected by significant...
  • Publication
    Nonsequential neural network for simultaneous, consistent classification, and photometric redshifts of OTELO galaxies
    Context. Computational techniques are essential for mining large databases produced in modern surveys with value-added products. Aims: This paper presents a...
  • Publication
    Novel framework for the three-dimensional NLTE inverse problem
    The inversion of spectropolarimetric observations of the solar upper atmosphere is one of the most challenging goals in solar physics. If we account for all...
  • Publication
    Nuclear molecular outflow in the Seyfert galaxy NGC 3227
    ALMA observations have revealed nuclear dusty molecular disks or tori with characteristic sizes 15-40 pc in the few Seyferts and low -luminosity AGN that have...
  • Publication
    Nuclear obscuration in LINERs. Clues from Spitzer/IRS spectra on the Compton thickness and the existence of the dusty torus
    Context. Most of the optically classified low-ionisation, narrow emission-line regions (LINERs) nuclei host an active galactic nucleus (AGN). However, how they...
  • Publication
    Numerical determination of the cutoff frequency in solar models
    Context. In stratified atmospheres, acoustic waves can only propagate if their frequency is higher than the cutoff value. The determination of the cutoff...
  • Publication
    Numerical modeling of lander interaction with a low-gravity asteroid regolith surface. II. Interpreting the successful landing of Hayabusa2 MASCOT
    Context. The JAXA asteroid sample return mission Hayabusa2 reached its target (162173) Ryugu in June 2018 and released the European (CNES-DLR) lander MASCOT in...
  • Publication
    Numerical modelling of spectral line asymmetries in photospheric structures. I. Quiet Sun.
    Modelling of asymmetries in spectral lines with different formation heights (K I 7699, Fe I 5576 and Fe I 5635A), observed in the quiet Sun at the disk center...
  • Publication
    Numerical modelling of spectral line asymmetries in photospheric structures. II. Plage regions.
    A numerical code has been developed for modelling the asymmetries in three spectral lines (K I 7699, Fe I 5576 and Fe I 5635A) formed at different photospheric...