In this paper we review the current status of research on the observational and theoretical
characteristics of isolated and binary magnetic white dwarfs (MWDs). Magnetic fields of …

We have used multi-epoch images from the Infrared Array Camera on board the Spitzer
Space Telescope to search for substellar companions to stars in the solar neighborhood …

We present the discovery of a comoving planetary-mass companion∼ 42''(∼ 2000 AU) from
a young M3 star, GU Psc, a likely member of the young AB Doradus Moving Group …

We study the stability of systems of three giant planets orbiting 3–8 M⊙ stars at orbital
distances of> 10 au as the host star ages through the main sequence (MS) and well into the …

We report the discovery of 76 new T dwarfs from the UKIRT Infrared Deep Sky Survey
(UKIDSS) Large Area Survey (LAS). Near-infrared broad-and narrow-band photometry and …

We present Spitzer follow-up imaging of 95 candidate extremely cold brown dwarfs
discovered by the Backyard Worlds: Planet 9 citizen science project, which uses visually …

With the launch of the Wide-field Infrared Survey Explorer (WISE), a new era of detecting
planetary debris and brown dwarfs (BDs) around white dwarfs (WDs) has begun with the …

We identify and investigate known late M, L, and T dwarfs in the Gaia second data release.
This sample is being used as a training set in the Gaia data processing chain of the ultracool …

We present the discovery of 57 wide (> 5'') separation, low-mass (stellar and substellar)
companions to stars in the solar neighborhood identified from Pan-STARRS 1 (PS1) data …

We identify and investigate known ultracool stars and brown dwarfs that are being observed
or indirectly constrained by the Gaia mission. These objects will be the core of the Gaia …