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Fifteen new T dwarfs discovered in the UKIDSS Large Area Survey
D. J. Pinfield, B. Burningham, M. Tamura +32
We present the discovery of fifteen new T2.5-T7.5 dwarfs (with estimated distances between ~24-93pc, identified in the first three main data releases of the UKIRT Infrared Deep Sky…
A Nearby Old Halo White Dwarf Candidate from the Sloan Digital Sky Survey
Patrick B. Hall, Piotr M. Kowalski, Hugh C. Harris +5
We report the discovery of a nearby, old, halo white dwarf candidate from the Sloan Digital Sky Survey. SDSS J110217.48+411315.4 has a proper motion of 1.75 arcsec/year and redder…
A very cool brown dwarf in UKIDSS DR1
S. J. Warren, D. J. Mortlock, S. K. Leggett +21
(abridged) We report the discovery of a very cool brown dwarf, ULAS J003402.77-005206.7 (ULAS J0034-00), identified in UKIDSS DR1. We provide optical, near-infrared, and mid-infrar…
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…
Trigonometric Parallaxes of Central Stars of Planetary Nebulae
Hugh C. Harris, Conard C. Dahn, Blaise Canzian +11
Trigonometric parallaxes of 16 nearby planetary nebulae are presented, including reduced errors for seven objects with previous initial results and results for six new objects. The…
JHK Observations of Faint Standard Stars in the Mauna Kea Near-Infrared Photometric System
S. K. Leggett, M. J. Currie, W. P. Varricatt +10
JHK photometry in the Mauna Kea Observatory (MKO) near-IR system is presented for 115 stars. Of these, 79 are UKIRT standards and 42 are LCO standards. The average brightness is 11…