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.…