Astrophysical: Exoplanet formation

  • Publication
    JWST Unveils a High Mean Molecular Weight Atmosphere for Mini-Neptune TOI-1130 b: Evidence for Formation Beyond the Water Ice Line
    We present the combined JWST/NIRSpec/G395H and NIRISS/SOSS transmission spectrum of a warm mini-Neptune, TOI-1130 b (3.66 R ⊕, 19.8 M ⊕, and T eq ∼ 825 K). It...
  • Publication
    Planets Around Solar Twins/Analogs (PASTA). I. High-precision Stellar Chemical Abundances for 17 Planet-hosting Stars and the Condensation Temperature Trend
    The Sun is depleted in refractory elements compared to nearby solar twins, which may be linked to the formation of giant or terrestrial planets. Here we present...
  • News
    Rocky exoplanets and their host stars may have similar composition
    Newly formed stars have protoplanetary discs around them. A fraction of the material in the disc condenses into planet-forming chunks, and the rest finally...
  • News
    The CHEOPS mission measures the properties of one of the hottest and most extreme extrasolar planets
    CHEOPS, the new exoplanet mission of the European Space Agency (ESA), in which the Instituto de Astrofísica de Canarias (IAC) is participating, has observed a...
  • News
    The first “ultrahot Neptune” is discovered
    A team of astronomers from the University of Chile, in collaboration with the Instituto de Astrofísica de Canarias (IAC) and the University of La Laguna (ULL)...
  • Publication
    The Polar Orbit of TOI-2374 b, a Planet in the Neptunian Ridge
    The "Neptunian ridge" is a recently identified peak in the frequency of planets with sizes between that of Neptune and Saturn orbiting their host stars with...
  • News
    The synchronized dance of a system of six planets is revealed
    An international collaboration, with participation by the Instituto de Astrofísica de Canarias (IAC), has found a system of six exoplanets orbiting a central...
  • Publication
    The TESS-Keck Survey. II. An Ultra-short-period Rocky Planet and Its Siblings Transiting the Galactic Thick-disk Star TOI-561
    We report the discovery of TOI-561, a multiplanet system in the galactic thick disk that contains a rocky, ultra-short-period planet. This bright (V = 10.2)...
  • Publication
    TOI-1670 b and c: An Inner Sub-Neptune with an Outer Warm Jupiter Unlikely to Have Originated from High-eccentricity Migration
    We report the discovery of two transiting planets around the bright (V = 9.9 mag) main-sequence F7 star TOI-1670 by the Transiting Exoplanet Survey Satellite...