Evidence for a radiation belt around a brown dwarf

Abstract

Radio observations of ultracool dwarfs, objects comprising brown dwarfs and the very lowest mass stars, have mainly focused on analyzing their light-curve and spectral energy distributions providing valuable insights into their magnetic fields. However, spatially-resolved studies of such magnetospheres have been elusive so far. Radio interferometric observations of the brown dwarf LSR J1835+3259 reveal an extended magnetosphere with a morphology compatible with the presence of a radiation belt, similar to that of Jupiter and Earth, consisting of energetic particles confined via magnetic mirroring. Our finding suggests that 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.

References in corpus (22)

• Gaia Data Release 3: Summary of the content and survey properties
• Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
• A terrestrial planet candidate in a temperate orbit around Proxima Centauri
• Large-scale magnetic topologies of late M dwarfs
• Confirmation of the Electron Cyclotron Maser Instability as the Dominant Source of Radio Emission from Very Low Mass Stars and Brown Dwarfs
• Radio Observations of a Large Sample of Late-M, L, and T Dwarfs: The Distribution of Magentic Field Strengths
• Rotational Modulation of the Radio Emission from the M9 Dwarf TVLM 513-46546: Broadband Coherent Emission at the Substellar Boundary?
• On the Inference of a Star's Inclination Angle from its Rotation Velocity and Projected Rotation Velocity
• Doppler Imaging of Exoplanets and Brown Dwarfs
• Simultaneous Multi-Wavelength Observations of Magnetic Activity in Ultracool Dwarfs. II. Mixed Trends in VB10 and LSR1835+32 and the Possible Role of Rotation
• A Panchromatic View of Brown Dwarf Aurorae
• A scaling relationship for non-thermal radio emission from ordered magnetospheres: from the top of the Main Sequence to planets
• First Detection of a Strong Magnetic Field on a Bursty Brown Dwarf: Puzzle Solved
• Evidence for a radiation belt around a brown dwarf
• Limits on the Auroral Generation of H${}_3^{+}$ in Brown Dwarf and Extrasolar Giant Planet Atmospheres with Keck/NIRSPEC
• Radio-flaring Ultracool Dwarf Population Synthesis
• First spectropolarimetric measurement of a brown dwarf magnetic field in molecular bands
• Modelling the environment around five ultracool dwarfs via the radio domain
• Multi-Epoch VLBI of L Dwarf Binary 2MASS J0746+2000AB: Precise Mass Measurements and Confirmation of Radio Emission from Both Components
• Radio emission in a nearby ultracool dwarf binary: a multi-frequency study
• The photometric periods of rapidly rotating field ultra-cool dwarfs
• Predicting the time variation of radio emission from MHD simulations of a flaring T-Tauri star

Cited by in corpus (11)

• Resolved imaging of an extrasolar radiation belt around an ultracool dwarf
• Evidence for a radiation belt around a brown dwarf
• The FAST Core Array
• The Occurrence Rate of Quiescent Radio Emission for Ultracool Dwarfs using a Generalized Semi-Analytical Bayesian Framework
• Unravelling sub-stellar magnetospheres
• Radiative Back-Reaction on Charged Particle Motion in the Dipole Magnetosphere of Neutron Stars
• Hints of auroral and magnetospheric polarized radio emission from the scallop-shell star 2MASS J05082729$-$2101444
• Transitions in magnetic behavior at the substellar boundary
• Universal energy limits of radiation belts in planetary and brown dwarf magnetospheric systems
• Collisionless Phase Mixing Mimics Diffusive Transport in Radiation Belt Observations
• Orbital motion and dynamical mass of the complex periodic variable binary system 2MASS J05082729-2101444