Journal: Astronomy and Astrophysics

  • Publication
    A search for substellar members in the Praesepe and σ Orionis clusters
    We have conducted deep photometric searches for substellar members of the Praesepe (0.5-1 Gyr) and σ Orionis (3 Myr) star clusters using the Sloan i' and z'...
  • Publication
    A search for transiting planets around hot subdwarfs. I. Methods and performance tests on light curves from Kepler, K2, TESS, and CHEOPS
    Context. Hot subdwarfs experienced strong mass loss on the red giant branch (RGB) and are now hot and small He-burning objects. These stars constitute excellent...
  • Publication
    A seismic and gravitationally bound double star observed by Kepler. Implication for the presence of a convective core
    Context. Solar-like oscillations have been observed by Kepler and CoRoT in many solar-type stars, thereby providing a way to probe stars using asteroseismology...
  • Publication
    A seismological analysis of δ Scuti stars in the Pleiades cluster
    A comparison between the oscillation frequencies of six multi-periodic δ Scuti stars of the Pleiades cluster and the eigenfrequencies of rotating stellar models...
  • Publication
    A Si I atomic model for NLTE spectropolarimetric diagnostics of the 10 827 Å line
    Aims: The Si i 10 827 Å line is commonly used for spectropolarimetric diagnostics of the solar atmosphere. First, we aim at quantifying the sensitivity of the...
  • Publication
    A slow bar in the lenticular barred galaxy NGC 4277
    Aims: We characterised the properties of the bar hosted in lenticular galaxy NGC 4277, which is located behind the Virgo cluster. Methods: We measured the bar...
  • Publication
    A spatial study of the mid-IR emission features in four Herbig Ae/Be stars
    Context: Infrared (IR) spectroscopy and imaging provide a prime tool to study the characteristics of polycyclic aromatic hydrocarbon (PAH) molecules and the...
  • Publication
    A spectroscopic analysis of the Luminous Blue Variable candidate WRA 751
    We present spectroscopic observations of the LBV candidate WRA 751 taken at different epochs during the period 1989-1995. These observations are used to monitor...
  • Publication
    A spectroscopic analysis of the most polarizing atomic lines of the second solar spectrum
    We present an analysis of the second solar spectrum, as plotted in graphical form in the three volumes of the atlas “The Second Solar Spectrum”, in the...