3 papers
astro-ph2008★ 6 cited
Ultracool Subdwarfs: The Halo Population Down to the Substellar Limit
Adam J. Burgasser, Sebastien Lepine, Nicolas Lodieu +5
Ultracool subdwarfs are low luminosity, late-type M and L dwarfs that exhibit spectroscopic indications of subsolar metallicity and halo kinematics. Their recent discovery and ongo…
astro-ph2008★ 124 cited
Exploring the substellar temperature regime down to ~550K
Ben Burningham, D. J. Pinfield, S. K. Leggett +15
We report the discovery of three very late T dwarfs in the UKIRT Infrared Deep Sky Survey (UKIDSS) Third Data Release: ULAS J101721.40+011817.9 (ULAS1017), ULAS J123828.51+095351.3…
astro-ph2008★ 23 cited
The ages of L dwarfs
R. F. Jameson, N. Lodieu, S. L. Casewell +2
We present a new method to derive the age of young (<0.7 Gyr) L dwarfs based on their near-infrared photometry, colours, and distances. The method is based on samples of L dwarfs b…