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Resolved imaging confirms a radiation belt around an ultracool dwarf

Space Sciences

Resolved imaging confirms a radiation belt around an ultracool dwarf

M. M. Kao, A. J. Mioduszewski, et al.

In an exciting exploration of cosmic phenomena, researchers Melodie M. Kao, Amy J. Mioduszewski, Jackie Villadsen, and Evgenya L. Shkolnik unveil high-resolution imaging of the ultracool dwarf LSR J1835+3259, revealing a fascinating double-lobed structure akin to Jupiter's radiation belts. This discovery supports predictions of radiation belts across various stellar masses and calls for a fresh look at rotating magnetic dipoles and their role in non-thermal radio emissions.

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Playback language: English
Abstract
Radiation belts, persistent equatorial zones of relativistic particles, exist in all large-scale Solar System planetary magnetospheres. This paper presents high-resolution imaging of the ultracool dwarf LSR J1835+3259 at 8.4 GHz, revealing a double-lobed, axisymmetrical structure resembling Jupiter's radiation belts. This confirms predictions of radiation belts across the stellar mass sequence and suggests a broader re-examination of rotating magnetic dipoles in producing non-thermal quiescent radio emissions.
Publisher
Nature
Published On
May 15, 2023
Authors
Melodie M. Kao, Amy J. Mioduszewski, Jackie Villadsen, Evgenya L. Shkolnik
Tags
radiation belts
ultracool dwarf
magnetic dipoles
non-thermal emissions
cosmic phenomena
stellar mass sequence

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