Discovery of a luminous white dwarf in a young star cluster in the Large   Magellanic Cloud
  We have identified a candidate 1-2 x 10^5 year old luminous white dwarf in NGC 1818, a young star cluster in the Large Magellanic Cloud. This discovery strongly constrains the boundary mass M_c at which stars stop forming neutron stars and start forming white dwarfs, to M_c > 7.6 Msun. 
Rebecca A. W. Elson, Steinn Sigurdsson, Jarrod Hurley, Melvyn B.   Davies, and Gerard F. Gilmore (Institute of Astronomy, Ca...