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THE HAWAII INFRARED PARALLAX PROGRAM. I. ULTRACOOL BINARIES AND THE L/T TRANSITION* , **
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 (spectral types M6-T9) in 49Expand
Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations
To empirically calibrate the IR surface brightness fluctuation (SBF) distance scale and probe the properties of unresolved stellar populations, we measured fluctuations in 65 galaxies using NICMOS onExpand
A Near-infrared Spectroscopic Study of Young Field Ultracool Dwarfs
We present a near-infrared (0.9-2.4 μm) spectroscopic study of 73 field ultracool dwarfs having spectroscopic and/or kinematic evidence of youth (10-300 Myr). Our sample is composed of 48Expand
The Extremely Red, Young L Dwarf PSO J318.5338-22.8603: A Free-floating Planetary-mass Analog to Directly Imaged Young Gas-giant Planets
We have discovered using Pan-STARRS1 an extremely red late-L dwarf, which has (J – K){sub MKO} = 2.78 and (J – K){sub 2MASS} = 2.84, making it the reddest known field dwarf and second only to 2MASSExpand
IDENTIFYING THE YOUNG LOW-MASS STARS WITHIN 25 pc. II. DISTANCES, KINEMATICS, AND GROUP MEMBERSHIP*
We have conducted a kinematic study of 165 young M dwarfs with ages of 300?Myr. Our sample is composed of stars and brown dwarfs with spectral types ranging from K7 to L0, detected by ROSAT and withExpand
Characterizing young brown dwarfs using low-resolution near-infrared spectra
We present near-infrared (1.0-2.4 � m) spectra confirming the youth and cool temperatures of six brown dwarfs and low-mass stars with circumstellar disks toward the Chamaeleon II and OphiuchusExpand
IDENTIFYING THE YOUNG LOW-MASS STARS WITHIN 25 PC. I. SPECTROSCOPIC OBSERVATIONS*
We have completed a high-resolution (R 60,000) optical spectroscopic survey of 185 nearby M dwarfs identified using ROSAT data to select active, young objects with fractional X-ray luminositiesExpand
A STELLAR CENSUS OF THE TUCANA-HOROLOGIUM MOVING GROUP
We report the selection and spectroscopic confirmation of 129 new late-type (SpT = K3-M6) members of the Tucana-Horologium moving group, a nearby (d ~ 40 pc), young (τ ~ 40 Myr) population ofExpand
Discovery of a Large Dust Disk Around the Nearby Star AU Microscopii
TLDR
The discovery of a circumstellar dust disk surrounding AU Microscopii, a young M star at 10 parsec has the same age and origin as β Pictoris, another nearby star surrounded by a dust disk, providing new clues on how the majority of planetary systems might form and evolve. Expand
A Submillimeter Search of Nearby Young Stars for Cold Dust: Discovery of Debris Disks around Two Low-Mass Stars
We present results from a James Clerk Maxwell Telescope/SCUBA 850 � m search for cold dust around eight nearby young stars belonging to thePic (t � 12 Myr) and the Local Association (t � 50 Myr)Expand
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