Astronomers Find First Radiation Belt Outside Our Solar System – 10 Million Times Brighter Than Jupiter’s — High-resolution imaging of |
Artist’s impression of an aurora and the surrounding radiation belt of the ultracool dwarf LSR J1835+3259. Credit: Chuck Carter, Melodie Kao, Heising-Simons Foundation
The first images of an extrasolar radiation belt were obtained by combining 39 radio telescopes to form a virtual telescope spanning the globe from Hawaii to Germany. Credit: Melodie Kao, Amy Mioduszewski The ultracool dwarf imaged in this study straddles the boundary between low-mass stars and massive brown dwarfs. “While the formation of stars and planets can be different, the physics inside of them can be very similar in that mushy part of the mass continuum connecting low-mass stars to brown dwarfs and gas giant planets,” Kao explained.
“Auroras can be used to measure the strength of the magnetic field, but not the shape. We designed this experiment to showcase a method for assessing the shapes of magnetic fields on brown dwarfs and eventually exoplanets,” Kao said. The ultracool dwarf known as LSR J1835+3259 was the only object Kao felt confident would yield the high-quality data needed to resolve its radiation belts.
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