Over the last two decades, several thousand exoplanets have been identified, and their
study has become a high scientific priority. Direct imaging of nearby exoplanets and the …

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 describe a new method to achieve point-spread function (PSF) subtractions for high-
contrast imaging using principal component analysis that is applicable to both point sources …

This chapter reviews various methods of detecting planetary companions to stars from an
observational perspective, focusing on radial velocities, astrometry, direct imaging, transits …

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 …

Gas-giant planets that form via core accretion might have very different characteristics from
those that form via disk instability. Disk-instability objects are typically thought to have higher …

We present the discovery of seven ultracool brown dwarfs identified with the Wide-field
Infrared Survey Explorer (WISE). Near-infrared spectroscopy reveals deep absorption bands …

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 …

Context. The planetary system discovered around the young A-type HR 8799 provides a
unique laboratory to: a) test planet formation theories; b) probe the diversity of system …

ABSTRACT A new class of high-contrast image analysis algorithms that empirically fit and
subtract systematic noise has lead to recent discoveries of faint exoplanet/substellar …