A flare star is a type of variable star that exhibits unpredictable and sudden increases in brightness, known as stellar flares. These flares result from intense magnetic activity on the star’s surface, causing a release of energy in the form of electromagnetic radiation, including X-rays and ultraviolet light. Flare stars are typically red dwarfs, which are smaller and cooler than the Sun. The flares can be many times more energetic than solar flares observed on the Sun. The best-known example of a flare star is Proxima Centauri, the closest known star to the Sun. The study of flare stars contributes to our understanding of stellar atmospheres, magnetic fields, and the impact of flares on potential habitability in star systems.
