Journal: Astronomy and Astrophysics

  • Publication
    The nuclear star cluster of M 74: A fossil record of the very early stages of a star-forming galaxy
    Nuclear star clusters (NSC) are dense and compact stellar systems with sizes of a few parsecs located at galactic centers. Their properties and formation...
  • Publication
    The nuclear starburst activity in the Seyfert 2 galaxy NGC 7679
    We present our recent spectrophotometric results of the infrared luminous Seyfert 2 galaxy NGC 7679. We find compelling evidence for the presence of a recent...
  • Publication
    The nuclear stellar disc of the Milky Way: A dynamically cool and metal-rich component possibly formed from the central molecular zone
    Context. The nuclear stellar disc (NSD) is, together with the nuclear star cluster (NSC) and the central massive black hole, one of the main components in the...
  • Publication
    The O Vz stars in NGC 346: Distribution, stellar parameters, and insights into low-metallicity effects
    Context. O Vz stars are identified by optical spectra where the He II λ4686 absorption line is more intense than any other He line, suggesting they may be less...
  • Publication
    The O3N2 and N2 abundance indicators revisited: improved calibrations based on CALIFA and Te-based literature data
    The use of integral field spectroscopy is since recently allowing to measure the emission line fluxes of an increasingly large number of star-forming galaxies...
  • Publication
    The obliquity and atmosphere of the hot Jupiter WASP-122b (KELT-14b) with ESPRESSO: An aligned orbit and no sign of atomic or molecular absorption
    Thanks to their short orbital periods and hot extended atmospheres, hot Jupiters are ideal candidates for atmosphere studies with high- resolution spectroscopy...
  • Publication
    The obliquity and atmosphere of the ultra-hot Jupiter TOI-1431b (MASCARA-5b): A misaligned orbit and no signs of atomic or molecular absorptions
    Ultra-hot Jupiters are defined as giant planets with equilibrium temperatures larger than 2000 K. Most of them are found orbiting bright A-F type stars, making...
  • Publication
    The occultation of HIP 107302 by Jupiter
    Aims: Occultations of bright stars by planets provide information on the state of their atmospheres. An occultation of the bright star 45 Capricornii (HIP...
  • Publication
    The oldest Milky Way stars: New constraints on the age of the Universe and the Hubble constant
    Aims. In this work, we exploit the most robust, old, and cosmology-independent age estimates of individual stars from Gaia DR3 to place a lower bound on the age...