S22A0054

We aim to confirm new L-type brown dwarfs orbiting nearby bright stars and to obtain preliminary constraints on their atmospheric structures, elemental abundances, and rotation velocity that are available only from high-resolution spectra. Our targets are faint, red companions located at ∼1–10" around nearby bright stars identified from Gaia early data release 3. We will obtain high-resolution (R∼70,000−100,000), YJH-band spectra using REACH (SCExAO+IRD) and IRD+NGS-AO, leveraging their unique capabilities to perform high-resolution spectroscopy of faint objects without contamination from the nearby bright primaries. This program will triple the number of known L-type brown dwarfs orbiting bright solar-like stars within 50pc and observable from Mauna Kea, and will allow us to initiate a statistical census of how the bulk properties, chemistry, and kinematics of brown dwarfs are related to each other and evolve with spectral types.

This document was translated from L^AT_EX by H^EV^EA.