We present the detection of non-radial oscillations in a hot , helium-atmosphere white dwarf using 78.7 d of nearly uninterrupted photometry from the Kepler space telescope .
With an effective temperature > 30 { , } 000 K , PG 0112+104 becomes the hottest helium-atmosphere white dwarf known to pulsate .
The rich oscillation spectrum of low-order g -modes includes clear patterns of rotational splittings from consecutive sequences of dipole and quadrupole modes , which can be used to probe the rotation rate with depth in this highly evolved stellar remnant .
We also measure a surface rotation rate of 10.17404 hr from an apparent spot modulation in the K2 data .
With two independent measures of rotation , PG 0112+104 provides a remarkable test of asteroseismic inference .