In this talk I would like to present the LEWIS project. Looking into the faintEst WIth MUSE (LEWIS) is an ESO large program, granted with 133.5hrs with MUSE@ESO-VLT., is the first homogeneous integral-field spectroscopic survey of 30 extremely low-surface-brightness (LSB) galaxies in the Hydra I cluster of galaxies, where the majority of LSB galaxies in the sample (22 in total) are ultra-diffuse galaxies (UDGs). Because of their LSB nature, getting spectroscopic data for UDGs is a challenging task. To date, as opposed to the availability of deep images, we still lack a statistically significant sample of UDGs with spectroscopy, which strongly limits our constraints and conclusions on their stellar populations and DM content. Doubling the number of spectroscopically studied UDGs, with the LEWIS project we will make a decisive impact in this field. With LEWIS we will map, for the first time, i) the 2D stellar kinematics, ii) the stellar population and iii) established the GC population and their specific frequency of a complete sample of UDGs in a galaxy cluster with IF spectroscopic data. The structural properties together with the baryonic versus DM fraction are used in comparison with hydrodynamical models of UDGs to establish their formation channels as a function of their location in the cluster.
With LEWIS we are probing the MUSE capabilities to map the galaxy structure down to the faintest surface brightness levels.

Breve CV della Dr. Enrichetta Iodice:

Dopo la laurea in Fisica presso l'Università "Federico II" di Napoli ha conseguito il dottorato in Astrofisica all'International School for Advanced Studies di Trieste nel 2001. Successivamente ha svolto un post-doc all'INAF-OACapodimonte e dal 2004 è professore Associato. Dal 2023 ricopre il ruolo di Head of the National Coordination Centre for the VLT Survey Telescope, e dal 2025 è Presidente del Consiglio Scientifico dell'INAF. I suoi interessi scientifici riguardano la struttura e formazione di galassie brillanti nell'Universo vicino, intra-cluster lights and stellar halos, e galassie con bassa surface brightness.