A white dwarf in the binary system LAMOST J024048.51+195226.9 (J0240+1952 for short) completes a full rotation once every 24.93 seconds, making it the fastest spinning confirmed white dwarf, according to an analysis of data from the HiPERCAM instrument on the 10.4-m Gran Telescopio Canarias. An artist’s impression of LAMOST J024048.51+195226.9, the fastest spinning confirmed white dwarf and only second ever magnetic propeller known. Image credit:...
