Journal: Astronomy and Astrophysics

  • Publication
    The role of the Lorentz force in sunspot equilibrium
    Context. Sunspots survive on the solar surface for timescales ranging from days to months. This requires them to be in an equilibrium involving magnetic fields...
  • Publication
    The RoPES project with HARPS and HARPS-N. I. A system of super-Earths orbiting the moderately active K-dwarf HD 176986
    We report the discovery of a system of two super-Earths orbiting the moderately active K-dwarf HD 176986. This work is part of the RoPES RV program of G- and K...
  • Publication
    The Rossiter-McLaughlin effect revolutions: an ultra-short period planet and a warm mini-Neptune on perpendicular orbits
    Comparisons of the alignment of exoplanets with a common host star and each other can be used to distinguish among concurrent evolution scenarios for the star...
  • Publication
    The rotation rates of massive stars. How slow are the slow ones?
    Context. Rotation plays a key role in the life cycles of stars with masses above ~8 M⊙. Hence, accurate knowledge of the rotation rates of such massive stars is...
  • Publication
    The rotation speed of the companion star in Aquila X-1.
    We have obtained medium resolution spectra of the neutron star X-ray transient Aql X-1 during quiescence. We determine the spectral type of the companion star...
  • Publication
    The rotation speed of the companion star in V395 CAR (=2S0921-630)
    We have obtained high resolution optical spectroscopy of the accretion disc corona source 2S0921-630 (=V395 Car) that constrains the spectral type of the...
  • Publication
    The rotation-metallicity relation for the Galactic disk as measured in the Gaia DR1 TGAS and APOGEE data
    Aims: Previous studies have found that the Galactic rotation velocity-metallicity (V-[Fe/H]) relations for the thin and thick disk populations show negative and...
  • Publication
    The rotation-metallicity relation for the Galactic disk as measured in the Gaia DR1 TGAS and APOGEE data
    Aims: Previous studies have found that the Galactic rotation velocity-metallicity (V-[Fe/H]) relations for the thin and thick disk populations show negative and...
  • Publication
    The rotational broadening of V395 Carinae. Implications on the compact object's mass
    Context: The masses previously obtained for the X-ray binary 2S 0921-630 inferred a compact object that was either a high-mass neutron star or low-mass black...