Gravity-sensitive Spectral Indices in Ultracool Dwarfs: Investigating Correlations with Metallicity and Planet Occurrence using SpeX and FIRE Observations

Fatemeh Davoudi, Benjamin V. Rackham, Julien de Wit +5

We present a near-infrared spectroscopic analysis (0.9--2.4~$\mu$m) of gravity indices for 56 ultracool dwarfs (M5.5--L0), including exoplanet hosts SPECULOOS-2, SPECULOOS-3, and LHS…