ZZ Ceti stars
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| definition | A member of a class of non-radially pulsating stars that change their brightnesses with periods from 30 seconds to 25 minutes and amplitudes from 0.001 to 0.2 mag in V. Their location on the Hertzsprung-Russell diagram identifies them as white dwarf stars that have entered the instability strip as they evolve along the white dwarf track. | |||||||||||
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| contributor | AAS_Frey.Katie_Admin original | |||||||||||