The Low-Mass Members of the Ursa Major Association
  We present a set of 5 over-densities in spatial-kinematic space previously
identified by Kounkel & Covey (2019) that may constitute extended tidal tails
associated with the nearby, 400-Myr old Ursa Major association. This sample of
1599 stars have a main-sequence turnoff point consistent with the age of Ursa
Major, and might contain its missing low-mass members. It includes 4 candidate
white dwarfs with properties that seem consistent with a total age of about 400
Myr, but we estimate from older white dwarf interlopers that about 33% of the
sample may be contaminated by random field stars.
