Mode Instability and a Massive, Isolated Outburst in the Pulsating White Dwarf GD 1212

J. J. Hermes, Keaton J. Bell, Andrew H. Dublin +8

We analyze a large brightening event that lasted for roughly half a day in the pulsating hydrogen-atmosphere white dwarf GD 1212 during K2 Campaign 12 of the extended Kepler missio…