GD 1212 showed the largest recorded outburst in a DAV white dwarf, attributed to parametric instability, with refined 17-hour rotation from mode splittings and a failed outburst event.
The likely signature of nonlinear resonant mode coupling
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Mode Instability and a Massive, Isolated Outburst in the Pulsating White Dwarf GD 1212
GD 1212 showed the largest recorded outburst in a DAV white dwarf, attributed to parametric instability, with refined 17-hour rotation from mode splittings and a failed outburst event.