We present a statistical analysis of the first 300 stars observed by the Gemini Planet Imager
Exoplanet Survey. This subsample includes six detected planets and three brown dwarfs; …

High-contrast adaptive optics (AO) imaging is a powerful technique to probe the
architectures of planetary systems from the outside-in and survey the atmospheres of self …

We present the first results from our high-precision infrared (IR) astrometry program at the
Canada–France–Hawaii Telescope. We measure parallaxes for 83 ultracool dwarfs …

Observations of circumstellar environments that look for the direct signal of exoplanets and
the scattered light from disks have significant instrumental implications. In the past 15 years …

The orbital eccentricities of directly imaged exoplanets and brown dwarf companions
provide clues about their formation and dynamical histories. We combine new high-contrast …

We present a large, uniform analysis of young (≈ 10–150 Myr) ultracool dwarfs, based on
new high-precision infrared (IR) parallaxes for 68 objects. We find that low-gravity (vl-g) late …

Context. In recent decades, direct imaging has confirmed the existence of substellar
companions (exoplanets or brown dwarfs) on wide orbits (> 10 au) around their host stars. In …

Context. Large surveys with new-generation high-contrast imaging instruments are needed
to derive the frequency and properties of exoplanet populations with separations from~ 5 to …

ABSTRACT We present new 1–1.25 μm (z and J band) Subaru/IRCS and 2 μm (K band)
VLT/NaCo data for HR 8799 and a re-reduction of the 3–5 μm MMT/Clio data first presented …

Optical spectroscopy is used to confirm membership for eight low-mass candidates in the
young Beta Pic moving group (BPMG) via their radial velocities, chromospheric activity and …