flare star

noun Astronomy.

1. a dwarf star that exhibits sudden increases of magnitude similar to solar flares.

noun

1. a red dwarf star in which outbursts, thought to be analogous to solar flares, occur, increasing the luminosity by several magnitudes in a few minutes

1. A variable star that sporadically displays sudden increases in brightness, sometimes becoming six times as bright in a matter of only a few minutes, after which it gradually fades back to its normal brightness. The cause of this phenomenon is thought to be an event similar to a solar flare, but on a more intense scale with a much higher emission of x-rays.