For the first time, astronomers have detected a radiation belt around a dwarf star outside our solar system. Radiation belts are zones of energetic particles trapped by a planet’s or star’s magnetic field. The discovery could help us understand how radiation belts form and evolve.

#RadiationBelt #DwarfStar #Astronomy

https://www.space.com/dwarf-star-radiation-belt-first-outside-solar-system

Radio interferometric observations of the #browndwarf LSR J1835+3259 reveal an extended #magnetosphere with a morphology compatible with the presence of a #radiationbelt, similar to that of Jupiter and Earth: https://arxiv.org/abs/2303.06453 - radio emitting ultracool dwarfs may behave as scaled up versions of Jupiter, validating the connection between dipole-ordered magnetic fields and the presence of belt-like morphologies and aurorae beyond our Solar System.