University of Montreal
A Deep Dive Spectroscopic Study of an Auroral Emitting World — This project will use JWST/NIRSpec and MIRI/MRS to obtain the first spectroscopic study of an auroral-emitting extrasolar world – the cold brown dwarf WISEP J1935-1546. Building on prior methane emission detections, the observations will search for CH4, H3+ and NH3+ features and test whether the emissions arise from a thermal inversion or magnetic interactions. The results will link planetary, substellar and exoplanetary atmospheric processes, demonstrating JWST’s unique reach for such faint targets.