Stellar multiplicity is a ubiquitous outcome of the star-formation process. The frequency and
main characteristics of multiple systems, and their dependence on primary mass and …

Adaptive optics is a prime example of how progress in observational astronomy can be
driven by technological developments. At many observatories it is now considered to be part …

The SpHere INfrared Exoplanet (SHINE) project is a 500-star survey performed with
SPHERE on the Very Large Telescope for the purpose of directly detecting new substellar …

A complete accounting of nearby objects—from the highest-mass white dwarf progenitors
down to low-mass brown dwarfs—is now possible, thanks to an almost complete set of …

Context. The nearest stars provide a fundamental constraint for our understanding of stellar
physics and the Galaxy. The nearby sample serves as an anchor where all objects can be …

We combine optical, near-infrared, and mid-infrared spectra and photometry to construct
expanded spectral energy distributions for 145 field age (> 500 Myr) and 53 young (lower …

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 …

Abstract The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is a
dual-hemisphere, near-infrared (NIR), spectroscopic survey with the goal of producing a …

We present the full results of our decade-long astrometric monitoring programs targeting 31
ultracool binaries with component spectral types M7–T5. Joint analysis of resolved imaging …

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 …