Tags: Star.
Giclas 29-38 is a variable white dwarf star of the DAV or ZZ Cetiwhose variability is due to large-amplitude non-radial pulsations known as gravity waves. It was first reported to be variable by Shulov and Kopatskaya in 1974. DAV stars are like normal white dwarfs but have luminosity variations with amplitudes as high as 30% arising from a superposition of vibrational modes with periods from 100 to 1000 seconds.
