A SECOND CASE OF OUTBURSTS IN A PULSATING WHITE DWARF OBSERVED BY <i>KEPLER</i>
A SECOND CASE OF OUTBURSTS IN A PULSATING WHITE DWARF OBSERVED BY <i>KEPLER</i>
We present observations of a new phenomenon in pulsating white dwarf stars: large-amplitude outbursts at timescales much longer than the pulsation periods. The cool (Teff = 11,010 K), hydrogen-atmosphere pulsating white dwarf PG 1149+057 was observed nearly continuously for more than 78.8 d by the extended Kepler mission in K2 …