Astrophysical: Techniques

  • Publication
    The K-dwarfs survey ─ I. Four validated planets from the radius valley to the Neptune desert
    Sub-Neptune-sized exoplanets are the most common class discovered by transit surveys, yet their detailed exploration has just begun. Their demographics have...
  • Publication
    The K2-24 planetary system revisited by CHEOPS
    The planetary system K2-24 is composed of two transiting low-density Neptunians locked in an almost perfect 2:1 resonance and showing large transit time...
  • Publication
    The K2-ESPRINT Project III: A Close-in Super-Earth around a Metal-rich Mid-M Dwarf
    We validate a {R}p=2.32+/- 0.24{R}\oplus planet on a close-in orbit (P = 2.260455 ± 0.000041 days) around K2-28 (EPIC 206318379), a metal-rich M4-type dwarf in...
  • Publication
    The K2-ESPRINT Project IV. A Hot Jupiter in a Prograde Orbit with a Possible Stellar Companion
    We report on the detection and early characterization of a hot Jupiter in a three day orbit around K2-34 (EPIC 212110888), a metal-rich F-type star located in...
  • Publication
    The K2-ESPRINT project. VI. K2-105 b, a hot Neptune around a metal-rich G-dwarf
    We report on the confirmation that the candidate transits observed for the star EPIC 211525389 are due to a short-period Neptune-sized planet. The host star...
  • Publication
    The KELT-7b atmospheric thermal-inversion conundrum revisited with CHEOPS, TESS, and additional data
    Context. Early theoretical works suggested that ultrahot Jupiters have inverted temperature-pressure (T–P) profiles in the presence of optical absorbers, such...
  • Publication
    The Kepler Follow-up Observation Program. II. Stellar Parameters from Medium- and High-resolution Spectroscopy
    We present results from spectroscopic follow-up observations of stars identified in the Kepler field and carried out by teams of the Kepler Follow-up...
  • Publication
    The L 98-59 System: Three Transiting, Terrestrial-size Planets Orbiting a Nearby M Dwarf
    We report the Transiting Exoplanet Survey Satellite (TESS) discovery of three terrestrial-size planets transiting L 98-59 (TOI-175, TIC 307210830)—a bright M...
  • Publication
    The lack of fast rotators in Cyg OB2: I. Insights from spectral reclassification of its B0 population
    Context. Cygnus OB2, located within the Cygnus X complex ─ one of the most active star-forming regions of the Galaxy ─ hosts hundreds of O- and B-type stars at...