2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2364Optical spectra are presented for a sample of T dwarfs, obtained using the Keck 10m Low Resolution Imaging Spectrograph. Dominant features are discussed, including possible temperature diagnostics.2 pages, 1 figure, to appear in proceedings of 4th Tetons Summer Conference on Galactic Structure, Stars, and the Interstellar Medium, ed. M. Bicay & C. WoodwardAstrophysicstext