Wolf 359
The surface has a magnetic field which is stronger than the average magnetic field on the Sun. As a result of magnetic activity caused by convection, Wolf 359 is a flare star that has sudden increases in luminosity for several minutes. These flares give off strong bursts of X-ray and gamma ray radiation. Wolf 359 is a relatively young star with an age of less than a billion years. No companions or disks of debris have been detected in orbit around it.