Impact of Electron Precipitation on Brown Dwarf Atmospheres and the Missing Auroral
H3+
Emission
J. Sebastian Pineda,
Gregg Hallinan,
Jean-Michel Desert
et al.
Abstract:Recent observations have demonstrated that very low-mass stars and brown dwarfs are capable of sustaining strong magnetic fields despite their cool and neutral atmospheres. These kilogauss field strengths are inferred based on strong, highly circularly polarized gigahertz radio emission, a consequence of the electron cyclotron maser instability. Crucially, these observations imply the existence of energetic nonthermal electron populations, associated with strong current systems, as are found in the auroral reg… Show more
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