The top panel shows the low-frequency FT of PG 0112+104. We identify two significant peaks, marked with red dots, which describe photometric modulation at the rotation period and its first harmonic. The bottom panel shows the K2 light curve binned into 200 points, folded at the rotation period of 10.17404 hr, and repeated for clarity. A simple spot model is underplotted in red and described in the text. Credit: Hermes et al., 2016.
Astronomers have recently discovered non-radial oscillations in a hot, helium-atmosphere white dwarf designated PG 0112+104. The newly detected 11 independent pulsation modes in this white dwarf could be essential for researchers testing the radial differential rotation and internal compositional stratification of highly evolved stellar remnants.
PG 0112+104 was...
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