Title: Searching for brown dwarfs with TESS follow up PI: Theron Carmichael Abstract ----------------------------------------------------------------------------------- The population of brown dwarfs that orbit stars is currently composed of only 19 objects. Nearly half of these objects have masses or radii that disagree with substellar evolutionary models. In order to better understand this unique population of objects and improve the fit to these models, we use CHIRON radial velocities to follow up transit detections by the TESS mission. These radial velocities will enable us to determine the eccentricity and orbital solution for these brown dwarfs, which are useful in exploring tidal interactions with the host star. CHIRON and TESS provide the necessary measurements to derive each brown dwarf’s mass and radius, which are direct benchmarks to substellar evolutionary models.