Dr. Chiara Buttitta (INAF/OACn)
26 February 2025
11:30, Aula Piazzi
Abstract:
Ultra-diffuse galaxies (UDGs) are extremely faint (μ₀ ≥ 24 mag/arcsec²) and diffuse (Re ≥ 1.5 kpc) systems whose nature is unknown. To date, only about 20 UDGs have been studied in detail and few of them have been spectroscopically analysed too. The Looking into the faintEst WIth MUSE (LEWIS) project is a large program, approved in the ESO period 108, to obtain the first homogeneous integral-field spectroscopic survey of UDGs in the Hydra I cluster of galaxies with MUSE@ESO-VLT. For all UDGs in Hydra I, the MUSE data will confirm the cluster membership, and measure their stellar kinematics and stellar populations. In this talk, I will show you the recent results on the stellar kinematics of LSB and UDGs galaxies in the Hydra I cluster. Stellar kinematics will allow us to investigate the mechanism that dynamically supports UDGs, recover the dynamical mass, and constrain the dark matter content.