Journal: Astronomy and Astrophysics

  • Publication
    ESPRESSO highlights the binary nature of the ultra-metal-poor giant HE 0107-5240
    Context. The vast majority of the known stars of ultra low metallicity ([Fe/H] < -4.5) are known to be enhanced in carbon, and belong to the "low-carbon band"...
  • Publication
    ESPRESSO mass determination of TOI-263b: an extreme inhabitant of the brown dwarf desert
    The TESS mission has reported a wealth of new planetary systems around bright and nearby stars amenable for detailed characterizations of planet properties and...
  • Publication
    ESPRESSO observations of HE 0107−5240 and other CEMP-no stars with [Fe/H] ≤ -4.5
    Context. HE 0107−5240 is a hyper metal-poor star with [Fe/H] = −5.39, one of the lowest-metallicity stars known. Its stellar atmosphere is enhanced in carbon...
  • Publication
    ESPRESSO reveals blueshifted neutral iron emission lines on the dayside of WASP-76 b
    Context. Ultra hot Jupiters (gas giants with T eq > 2000 K) are intriguing exoplanets due to the extreme physics and chemistry present in their atmospheres...
  • Publication
    Estimating the Degradation of Brightness Power Spectra of Solar Granulation from Images Outside the Disk Centre
    A method is presented to estimate the influence of the atmospheric turbulence and the telescope on the mean power spectra of the granulation brightness...
  • Publication
    Estimating the longitudinal magnetic field in the chromosphere of quiet-Sun magnetic concentrations
    Context. Details of the magnetic field in the quiet-Sun chromosphere are key to our understanding of essential aspects of the solar atmosphere. However, the...
  • Publication
    Estimating the magnetic field strength from magnetograms
    A properly calibrated longitudinal magnetograph is an instrument that measures circular polarization and gives an estimation of the magnetic flux density in...
  • Publication
    Estimation of Galactic model parameters in high latitudes with 2MASS
    Context: In general, studies focused on the Milky Way's structure show a range of values when deriving different Galactic parameters, such as radial...
  • Publication
    Estimation of stellar atmospheric parameters from SDSS/SEGUE spectra
    We present techniques for the estimation of stellar atmospheric parameters (T_eff, log~g, [Fe/H]) for stars from the SDSS/SEGUE survey. The atmospheric...