The evolutionary history of GD1400, a white dwarf-brown dwarf binary

S. L. Casewell, M. R. Burleigh, R. Napiwotzki +6

GD1400AB was one of the first known white dwarf$+$brown dwarf binaries, and is the only one of these systems where the white dwarf is a ZZ Ceti pulsator. Here we present both radia…