Journal: Astronomy and Astrophysics

  • Publication
    An open-source, massively parallel code for non-LTE synthesis and inversion of spectral lines and Zeeman-induced Stokes profiles
    With the advent of a new generation of solar telescopes and instrumentation, interpreting chromospheric observations (in particular, spectropolarimetry)...
  • Publication
    An optical and H i study of the dwarf Local Group galaxy VV124 = UGC4879. A gas-poor dwarf with a stellar disk?
    We present a detailed study of the dwarf galaxy VV124 (UGC4879), recently recognized as a remarkably isolated member of the Local Group. We have obtained deep...
  • Publication
    An optical time-resolved spectroscopic study of SS Cygni. II. Outburst.
    Time resolved spectra of SS Cyg corresponding to different outburst types are analyzed. Some evidence has been found for an increase of the mass transfer rate...
  • Publication
    An ultra-short period rocky super-Earth orbiting the G2-star HD 80653★
    Ultra-short period (USP) planets are a class of exoplanets with periods shorter than one day. The origin of this sub-population of planets is still unclear...
  • Publication
    An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685
    Dynamical histories of planetary systems, as well as the atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short...
  • Publication
    An uncombed inversion of multiwavelength observations reproducing the net circular polarization in a sunspot's penumbra
    Context. The penumbra of sunspots has a complex magnetic field topology whose three-dimensional organization remains unclear after more than a century of...
  • Publication
    An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242
    Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature...
  • Publication
    An unusual iron Lo-BAL quasar detected by ISOCAM
    We report the discovery of an unusual low-ionization broad absorption line quasar at z=1.776 which exhibits absorption lines from many excited states of Fe II...
  • Publication
    An unusually low-density super-Earth transiting the bright early-type M-dwarf GJ 1018 (TOI-244)
    Context. Small planets located at the lower mode of the bimodal radius distribution are generally assumed to be composed of iron and silicates in a proportion...