
Observations of a cool isolated brown dwarf reveal strong methane emission, indicating the presence of a temperature inversion likely caused by auroral heating processes in the atmosphere.


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Methane emission from a very cool brown dwarf, perhaps arising from an aurora, has been detected in James Webb Space Telescope observations.

Methane emission from a cool brown dwarf - Nature

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Discovery of Methane Emission from a Cool Isolated Brown Dwarf Suggesting Auroral Heating
