This is the first paper of a series aimed at studying the properties of late-type members of
young stellar kinematic groups. We concentrate our study on classical young moving groups …

I have used high-precision photometry and astrometry from the third data release of Gaia to
perform a survey for members of the TW Hya association (TWA). I have identified candidate …

We report the discovery of T dwarf companions to the nearby stars HN Peg (G0 V, 18.4 pc,
τ~ 0.3 Gyr) and HD 3651 (K0 V, 11.1 pc, τ~ 7 Gyr). During an ongoing survey of 5'× 5'fields …

Context. Emission lines that are indicative of active accretion have been observed for a
number of low-mass companions (M< 30 M Jup) to stars. Line variability is ubiquitous on …

Context. At young ages, low surface gravity affects the atmospheric properties of ultracool
dwarfs. The impact on medium-resolution near-infrared (NIR) spectra has only been slightly …

Previous studies have found that∼ 1 deg 2 fields surrounding the stellar aggregates in the
Taurus star-forming region exhibit a surplus of solar-mass stars relative to denser clusters …

We have used the F160W filter (1.4–1.8 μm) and the coronagraph on the Near-Infrared
Camera and Multi-Object Spectrometer (NICMOS) on the Hubble Space Telescope to …

Abstract We present Lick Natural Guide Star Adaptive Optics observations of the L8 brown
dwarf Gl 337C, which is resolved for the first time into two closely separated (0 farcs 53±0 …

During an imaging survey of the Chamaeleon I star-forming region with the Advanced
Camera for Surveys aboard the Hubble Space Telescope, we have discovered a candidate …

Young isolated radio-quiet neutron stars are still hot enough to be detectable at X-ray and
optical wavelengths due to their thermal emission and can hence probe cooling curves. An …