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; …

Context. The census of stellar and substellar companions of nearby stars is largely
incomplete, in particular toward the low-mass brown dwarf and long-period exoplanets. It is …

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 …

Context. Circumstellar disks and self-luminous giant exoplanets or companion brown dwarfs
can be characterized through direct-imaging polarimetry at near-infrared wavelengths …

Context. β Pictoris is arguably one of the most studied stellar systems outside of our own.
Some 30 yr of observations have revealed a highly-structured circumstellar disk, with rings …

Context. Polarimetric imaging is one of the most effective techniques for high-contrast
imaging and for the characterization of protoplanetary disks, and it has the potential of …

The HR 8799 system uniquely harbors four young super-Jupiters whose orbits can provide
insights into the system's dynamical history and constrain the masses of the planets …

We report the results of a∼ 4 yr direct imaging survey of 104 stars to resolve and
characterize circumstellar debris disks in scattered light as part of the Gemini Planet Imager …

The direct characterization of exoplanetary systems with high-contrast imaging is among the
highest priorities for the broader exoplanet community. As large space missions will be …

Direct imaging of exoplanets presents a formidable technical challenge owing to the small
angular separation and high contrast between exoplanets and their host stars. High …