After decades of fast-paced technical advances, optical/infrared (O/IR) interferometry has
seen a revolution in recent years:▪ The GRAVITY instrument at the Very Large Telescope …

Constraining planet formation based on the atmospheric composition of exoplanets is a
fundamental goal of the exoplanet community. Existing studies commonly try to constrain …

Context. The multiplicity fraction of stars, down to the substellar regime, is a parameter of
fundamental importance for stellar formation, evolution, and planetology. The census of …

Context. Clouds are ubiquitous in exoplanet atmospheres and they represent a challenge
for the model interpretation of their spectra. When generating a large number of model …

We present K-band interferometric observations of the PDS 70 protoplanets along with their
host star using VLTI/GRAVITY. We obtained K-band spectra and 100 μas precision …

Isotope abundance ratios have an important role in astronomy and planetary sciences,
providing insights into the origin and evolution of the Solar System, interstellar chemistry and …

We present an open-source Python package, Orbits from Radial Velocity, Absolute, and/or
Relative Astrometry (orvara), to fit Keplerian orbits to any combination of radial velocity …

The present-day envelope of gaseous planets is a relic of how these giant planets originated
and evolved. Measuring their elemental composition therefore presents a powerful …

Abstract Using the Keck Planet Imager and Characterizer, we obtained high-resolution (R∼
35,000) K-band spectra of the four planets orbiting HR 8799. We clearly detected H 2 O and …

Aims. We aim to demonstrate that the presence and mass of an exoplanet can now be
effectively derived from the astrometry of another exoplanet. Methods. We combined …