Astrophysical: Radial velocity

  • Publication
    A Close-in Puffy Neptune with Hidden Friends: The Enigma of TOI 620
    We present the validation of a transiting low-density exoplanet orbiting the M2.5 dwarf TOI 620 discovered by the NASA Transiting Exoplanet Survey Satellite...
  • Publication
    A cold massive interstellar cloud within 120 parsecs of the Sun: K I optical and H I radio observations
    We first discovered the presence of a particularly massive cloud in the neighborhood of the Sun, close to the Galactic plane in the direction of Perseus, toward...
  • Publication
    A Massive Hot Jupiter Orbiting a Metal-rich Early M Star Discovered in the TESS Full-frame Images
    Observations and statistical studies have shown that giant planets are rare around M dwarfs compared with Sun-like stars. The formation mechanism of these...
  • Publication
    A measurement of the background solar velocity spectrum
    Ten years of continuous measurements of the radial velocity of the Sun have been used to estimate the contribution of various solar surface phenomena to the...
  • News
    A new super-Earth detected orbiting a red dwarf star
    In recent years there has been an exhaustive study of red dwarf stars to find exoplanets in orbit around them. These stars have effective surface temperatures...
  • Publication
    Absolute parameter determination in low-mass eclipsing binaries - Radiative parameters for BH Vir, ZZ UMA and CR CAS
    A new uvby and H-beta monitoring program of low mass eclipsing binaries is currently being carried out in the framework of a 5-yr observational program which...
  • Publication
    Acoustic oscillations in the K2 III star Arcturus
    Simultaneous spectrometric and photometric observations have been performed on the red giant star Arcturus, in a search for radial velocity or luminosity...
  • Publication
    An Earth-sized Planet around an M5 Dwarf Star at 22 pc
    We report on the discovery of an Earth-sized transiting planet (R p = 1.015 ± 0.051 R ⊕) in a P = 4.02 day orbit around K2-415 (EPIC 211414619), an M5V star at...
  • Publication
    An optical time-resolved spectroscopic study of SS Cygni. 1: Quiescence
    In this work we analyze time-resolved spectra of SS Cygni in quiescence. The geometrical and orbital fundamental parameters of the system are determined. When...