This review discusses how low-energy valence excitations created by swift electrons can
render information on the optical response of structured materials with unmatched spatial …

We present final Spitzer trigonometric parallaxes for 361 L, T, and Y dwarfs. We combine
these with prior studies to build a list of 525 known L, T, and Y dwarfs within 20 pc of the …

We present an open-source Python package, Orbits from Radial Velocity, Absolute, and/or
Relative Astrometry (orvara), to fit Keplerian orbits to any combination of radial velocity …

We present results of the largest, most comprehensive study ever done of the stellar
multiplicity of the most common stars in the Galaxy, the red dwarfs. We have conducted an …

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 …

We present new evolution sequences for very low mass stars, brown dwarfs, and giant
planets and use them to explore a variety of influences on the evolution of these objects …

Young and directly imaged exoplanets offer critical tests of planet-formation models that are
not matched by radial velocity surveys of mature stars. These targets have been extremely …

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 …

We have conducted a high-resolution imaging study of the Taurus–Auriga star-forming
region in order to characterize the primordial outcome of multiple star formation and the …

The dynamical influence of binary companions is expected to profoundly influence planetary
systems. However, the difficulty of identifying planets in binary systems has left the …