Astrophysical: Techniques

  • Publication
    Tighter constraints on the atmosphere of GJ 436 b from combined high-resolution CARMENES and CRIRES<SUP>+</SUP> observations
    Context. Transmission spectra of Neptune-sized exoplanets are frequently observed to be featureless at low-to-mid resolutions from space; whereas high-altitude...
  • Publication
    Time series of high resolution photospheric spectra in a quiet region of the Sun. II. Analysis of the variation of physical quantities of granular structures
    From the inversion of a time series of high resolution slit spectrograms obtained from the quiet sun, the spatial and temporal distribution of the...
  • Publication
    Time series of high resolution photospheric spectra in a quiet region of the sun. I. Analysis of global and spatial variations of line parameters
    A 50 min time series of one-dimensional slit-spectrograms, taken in quiet sun at disk centre, observed at the German Vacuum Tower Telescope (Observatorio del...
  • Publication
    Time Series of Solar Granulation Images. I. Differences between Small and Large Granules in Quiet Regions
    A 90 minute time series of high spatial resolution white-light images of solar granulation, obtained at the Swedish Vacuum Solar Tower (Observatorio del Roque...
  • Publication
    Time Variation of Kepler Transits Induced By Stellar Rotating Spots—a Way to Distinguish between Prograde and Retrograde Motion. I. Theory
    Some transiting planets discovered by the Kepler mission display transit timing variations (TTVs) induced by stellar spots that rotate on the visible hemisphere...
  • Publication
    Time-resolved Spectroscopy of RS Canum Venaticorum Short-Period Systems. II. RT Andromedae, WY Cancri, and XY Ursae Majoris
    We present the second part of the results of our spectroscopic study of orbital phase resolution of short-period active binaries. In this paper we present the...
  • Publication
    Titanium chemistry of WASP-121 b with ESPRESSO in 4-UT mode
    Transit spectroscopy usually relies on the integration of one or several transits to achieve the signal-to-noise ratio (S/N) necessary to resolve spectral...
  • Publication
    TMCalc - a fast code to derive Teff and [Fe/H] for FGK stars
    We present a new direct spectroscopic calibration for a fast estimation of the stellar metallicity [Fe/H]. This calibration was computed using a large sample of...
  • Publication
    TOI-1055 b: Neptunian planet characterised with HARPS, TESS, and CHEOPS
    Context. TOI-1055 is a Sun-like star known to host a transiting Neptune-sized planet on a 17.5-day orbit (TOI-1055 b). Radial velocity (RV) analyses carried out...