The discovery of large numbers of young low-mass stars and brown dwarfs over the past
decade has made it possible to investigate star formation and early evolution in a previously …

“Free-floating, non-deuterium-burning, substellar objects” are isolated bodies of a few
Jupiter masses found in very young open clusters and associations, nearby young moving …

We present the discovery of 15 new T2. 5–T7. 5 dwarfs (with estimated distances∼ 24–93
pc), identified in the first three main data releases of the United Kingdom Infrared Telescope …

We present the results of photometric and spectroscopic follow-ups of the lowest mass
member candidates in the nearest OB association, Upper Scorpius (∼ 5–10 Myr; 145±17 …

Context. Deep photometric surveys of substellar objects in young clusters and high-redshift
quasars are affected by contaminant sources at different heliocentric distances. If not …

We have performed a census of circumstellar disks around brown dwarfs in the σ Ori cluster
using all available images from the Infrared Array Camera on board the Spitzer Space …

Context. Free-floating substellar candidates with estimated theoretical masses of as low as~
5 Jupiter masses have been found in the~ 3 Myr old σ Orionis open cluster. As the overlap …

Over the past decades open clusters have been the subject of many studies. Such studies
are crucial considering that the universality of the initial mass function is still a subject of …

Context. The determination of the lower-end of the initial mass function (IMF) provides strong
constraints on star formation theories. Aims. We report here on a search for isolated …

We utilize the ability of the Hubble Space Telescope to probe near-infrared water absorption
present in the atmosphere of low-mass stars and brown-dwarf and planetary-mass objects to …