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Four Faint T Dwarfs from the UKIRT Infrared Deep Sky Survey (UKIDSS) Southern Stripe
Kuenley Chiu, Michael C. Liu, Linhua Jiang +6
We present the optical and near-infrared photometry and spectroscopy of four faint T dwarfs newly discovered from the UKIDSS first data release. The sample, drawn from an imaged ar…
Physical and Spectral Characteristics of the T8 and Later-Type Dwarfs
S. K. Leggett, M. S. Marley, R. Freedman +5
We use new and published near-IR spectra, with synthetic spectra, to derive physical properties of three of the latest-type T dwarfs. A new R~1700 spectrum of the T7.5 dwarf HD 365…
Disks around Brown Dwarfs and Cool Stars
Daniel Apai, Kevin Luhman, Michael Liu
We review the current picture of disks around cool stars and brown dwarfs, including disk fractions, mass estimates, disk structure and dispersal, accretion, dust composition, and…
The Late-T Dwarf Companion to the Exoplanet Host Star HD 3651: A New Benchmark for Gravity and Metallicity Effects in Ultracool Spectra
Michael C. Liu, S. K. Leggett, Kuenley Chiu
(Abridged) We present near-IR photometry and spectroscopy of HD 3651B, the low-luminosity, wide-separation (480 AU) companion to the K0V exoplanet host star HD 3651A. We find a spe…