Journal: Astronomy and Astrophysics

  • Publication
    O-star mass-loss and wind momentum rates in the Galaxy and the Magellanic Clouds Observations and theoretical predictions.
    A new, very fast approximate method is presented to determine mass-loss rates of O-stars from Halpha_ line profiles. The method uses H and HeII departure...
  • Publication
    OB stars at the lowest Local Group metallicity. GTC-OSIRIS observations of Sextans A
    Context. Massive stars play an important role in the chemical and dynamical evolution of the Universe. The first metal-poor stars may have started the...
  • Publication
    Obliquities of exoplanet host stars: Nineteen new and updated measurements, and trends in the sample of 205 measurements
    Measurements of the obliquities in exoplanet systems have revealed some remarkable architectures, some of which are very different from the Solar System. Nearly...
  • Publication
    Obliquity measurement and atmospheric characterisation of the WASP-74 planetary system
    We present new transit observations of the hot Jupiter WASP-74 b (T eq ~ 1860 K) using the high-resolution spectrograph HARPS-N and the multi-colour...
  • Publication
    Observation of enhanced X-ray emission from the CTTS AA Tauri during one transit of an accretion funnel flow
    Context: Classical T Tauri stars are young solar-type stars accreting material from their circumstellar disks. Thanks to a favorable inclination of the system...
  • Publication
    Observation of VHE γ-rays from Cassiopeia A with the MAGIC telescope
    Aims:We searched for very high energy (VHE) γ-ray emission from the supernova remnant Cassiopeia A Methods: The shell-type supernova remnant Cassiopeia A was...
  • Publication
    Observational and numerical characterization of a recurrent arc-shaped front propagating along a coronal fan
    Context. Recurrent, arc-shaped intensity disturbances were detected by extreme-ultraviolet channels in an active region. The fronts were observed to propagate...
  • Publication
    Observational constraints on the optical and near-infrared emission from the neutron star-black hole binary merger candidate S190814bv
    Context. Gravitational wave (GW) astronomy has rapidly reached maturity, becoming a fundamental observing window for modern astrophysics. The coalescences of a...
  • Publication
    Observational evidence for two-component distributions describing solar magnetic bright points
    Context. High-resolution observations of the solar photosphere reveal the presence of fine structures, in particular the so-called Magnetic Bright Points (MBPs)...