Direct images of protoplanets embedded in disks around infant stars provide the key to
understanding the formation of gas giant planets such as Jupiter. Using the Subaru …

Context. Young circumstellar disks are the birthplaces of planets. Their study is of prime
interest to understand the physical and chemical conditions under which planet formation …

Context. The wind-driven halo is a feature that is observed in images that were delivered by
the latest generation of ground-based instruments that are equipped with an extreme …

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 …

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. Reference-star differential imaging (RDI) is a promising technique in high-contrast
imaging that is thought to be more sensitive to exoplanets and disks than angular differential …

Context. The diverse morphology among protoplanetary disks may result from planet-disk
interactions, suggesting the presence of planets undergoing formation. The characterization …

Context. HR 4796 A is surrounded by a debris disc, observed in scattered light as an
inclined ring with a high surface brightness. Past observations have raised several …

Aims. We studied the well-known circumstellar disk around the Herbig Ae/Be star HD 97048
with high angular resolution to reveal undetected structures in the disk which may be …

Context. Planet formation is expected to take place in the first million years of a planetary
system through various processes, which remain to be tested through observations. Aims …