FIRE MRS spectrum of the BD UGPSJ072227.51-054031.2

Furthermore, we find that flaws in the data like errors from order stitching can bias our constraints. We compare these retrieval results to those for an R~100 spectrum of the same object, revealing how constraints on atmospheric abundances and temperatures improve by an order of magnitude or more with increased spectral resolution. In particular, we can constrain the abundance of H_2_S, which is undetectable at lower spectral resolution.

While these medium-resolution retrievals offer the potential of precise, stellar-like constraints on atmospheric abundances (~0.02dex), our retrieved radius is unphysically small (R=0.50_-0.01_^+0.01^R_Jup_), indicating shortcomings with our modeling framework. This work is an initial investigation into brown dwarf retrievals at medium spectral resolution, offering guidance for future ground-based studies and JWST observations.