Spatially Resolving the Innermost Regions of the Accretion Discs of Young, Low-Mass Stars with GRAVITY

Low-mass, young stars — the T Tauri stars — make up the majority of young stellar objects. They have been relatively unexplored with optical long baseline interferometry owing to the cooler temperatures of their stellar photospheres which makes them fainter and more compact than the more frequently studied intermediate mass, young stars — the Herbig Ae/Be stars. With its greater flux sensitivity, GRAVITY has allowed us to explore T Tauri stars at high angular resolution in unprecedented detail. Here we present highlights from two such studies.