Ongoing Works

LEWIS paper IV (Mirabile et al. 2025, accepted for publications on A&A): Combining multiband imaging data OmegaCAM@VST, near-infrared H-band data from VIRCAM@VISTA and MUSE spectroscopic data from LEWIS, we analysed the GCs content in 4 UDGs with the largest number of GC candidates from the LEWIS sample. We present the adopted methodology and the results on GCs' specific frequency for this small sample of UDGs. The analysis will be applied to the full LEWIS sample in a forthcoming paper, together with the results.

LEWIS paper V (Doll et al. 2025, accepted for publications on A&A): Using MUSE data from LEWIS and previously published results on stellar kinematics, we are analysing the stellar population and star-formation histories of UDGs and LSBs in the LEWIS sample. We will present the average ages, metallicities, and alpha-abundances together with star-formation histories of UDGs and LBSs in Hydra I. Preliminary results show the existence of a correlation between the stellar population properties of UDGs and the location in the cluster, pointing toward the existence of two different classes of UDGs in Hydra I with a different formation pathway.