Speaker
Description
Ultra-diffuse galaxies (UDGs) are extremely faint $(\mu_{0,g} \geq 24$ mag/arcsec²) and diffuse $(R_e \geq$ 1.5 kpc) systems whose nature is unknown. Literature is now plenty of imaging data on UDGs whereas spectroscopic follow-up of large samples of UDGs remains rare. The “Looking into the faintEst WIth MUSE” (LEWIS) project will make a decisive impact on the field since it will study for the first time the stellar kinematics, stellar populations and globular clusters properties of a nearly complete sample of 30 UDGs in the Hydra I cluster of galaxies. In this talk, I will present recent results we obtained with LEWIS data, testing the MUSE’s performance under extreme conditions and setting its capabilities and limitations of doing spectroscopy in the low-surface brightness regime. I will show how the upcoming state-of-the-art facilities such as the Wide Space Telescope can open a new perspective on future studies of UDGs.
