flare star

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  • noun

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a red dwarf star in which luminosity can change several magnitudes in a few minutes

References in periodicals archive ?
66) The earliest confirmed observations of flare stars are attributed to W.
In analyzing their discovery, the observers rule out possible foreground objects in our own galaxy, such as flare stars, asteroids and dwarf novas, on grounds that the object, though variable, does not vary quickly enough for a flare star.
The star, spotted by astrophysicists at the University of Santiago de Compostela (Spain) and the Byurakan Observatory (Armenia), is the flare star, WX UMa.