Discovery of New Ultracool White Dwarfs in the Sloan Digital Sky Survey
Discovery of New Ultracool White Dwarfs in the Sloan Digital Sky Survey
We report the discovery of five new white dwarfs in the Sloan Digital Sky Survey. Four are ultracool, exhibiting strong collision-induced absorption (CIA) from molecular hydrogen and are similar in color to the three previously known coolest white dwarfs, SDSS J1337+00, LHS 3250, and LHS 1402. The fifth star shows …