ALCALA', JUAN MANUELJUAN MANUELALCALA'0000-0001-8657-095XCUPANI, GuidoGuidoCUPANI0000-0002-6830-9093Evans, C. J.C. J.EvansFRANCHINI, MariagraziaMariagraziaFRANCHINI0000-0001-5611-2333NISINI, BrunellaBrunellaNISINI0000-0002-9190-01132022-03-292022-03-2920220922-6435http://hdl.handle.net/20.500.12386/32050The science case on studies of accretion and outflows in low-mass (<1.5M⊙) young stellar objects (YSOs) with the new CUBES instrument is presented. We show the need for a high-sensitivity, near-ultraviolet (NUV) spectrograph like CUBES, with a resolving power at least four times that of X-Shooter and combined with UVES via a fibrelink for simultaneous observations. Simulations with the CUBES exposure time calculator and the end-to-end software show that a significant gain in signal-to-noise can be achieved compared to current instruments, for both the spectral continuum and emission lines, including for relatively embedded YSOs. Our simulations also show that the low-resolution mode of CUBES will be able to observe much fainter YSOs (V ∼ 22 mag) in the NUV than we can today, allowing us extend studies to YSOs with background-limited magnitudes. The performance of CUBES in terms of sensitivity in the NUV will provide important new insights into the evolution of circumstellar disks, by studying the accretion, jets/winds and photo-evaporation processes, down to the low-mass brown dwarf regime. CUBES will also open-up new science as it will be able to observe targets that are several magnitudes fainter than those reachable with current instruments, facilitating studies of YSOs at distances of ∼ kpc scale. This means a step-change in the field of low-mass star formation, as it will be possible to expand the science case from relatively local star-forming regions to a large swathe of distances within the Milky Way.STAMPAenArticle10.1007/s10686-022-09832-12-s2.0-85126359725https://api.elsevier.com/content/abstract/scopus_id/85126359725https://link.springer.com/article/10.1007/s10686-022-09832-1FIS/05 - ASTRONOMIA E ASTROFISICA