4 papers
The brightest pure-H ultracool white dwarf
S. Catalan, P. -E. Tremblay, D. J. Pinfield +9
We report the identification of LSR J0745+2627 in the United Kingdom InfraRed Telescope Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) as a cool white dwarf with kinemat…
Ultracool Dwarf Science from Widefield Multi-Epoch Surveys
N. R. Deacon, D. J. Pinfield, P. W. Lucas +9
Widefield surveys have always provided a rich hunting ground for the coolest stars and brown dwarfs. The single epoch surveys at the beginning of this century greatly expanded the…
Discovery of the first wide L dwarf + giant binary system and eight other ultra-cool dwarfs in wide binaries
Z. H. Zhang, D. J. Pinfield, A. C. Day-Jones +11
We identify 806 ultra-cool dwarfs from their SDSS riz photometry (of which 34 are newly discovered L dwarfs) and obtain proper motions through cross matching with UKIDSS and 2MASS.…
Benchmark ultra-cool dwarfs in widely separated binary systems
Z. H. Zhang, D. J. Pinfield, A. C. Day-Jones +2
Ultra-cool dwarfs as wide companions to subgiants, giants, white dwarfs and main sequence stars can be very good benchmark objects, for which we can infer physical properties with…