Ultradeep observations coming from HST and JWST are revealing abrupt drops in the external parts of galaxy mass profiles. These Low Surface Brightness features, dubbed as galaxy edges or truncations, deliver a physically-motivated size indicator. They represent the limit of the radial location of the gas density enabling efficient star formation, i.e. the outermost extension of the in-situ...
Stellar disk truncations are a long-sought galactic size indicator based on the radial location of the gas density threshold for star formation, i.e., the edge/limit of the luminous matter in a galaxy. The study of galaxy sizes is crucial for understanding the physical processes that shape galaxy evolution across cosmic time. Current and future ultradeep and large-area imaging surveys, such as...
A complete and satisfactory understanding of the processes that led to the formation and evolution of the variety of today’s galaxy types is still beyond our reach. To solve this problem, we need both large datasets reaching high redshifts and novel methodologies for dealing with them. The recent cutting-edge Dark Energy Spectroscopic Instrument (DESI) has already provided ~20 million...
The first Euclid data have shown the enormous potential of this astronomical facility to address a large number of scientific cases beyond the science core of the project. In particular, the Early Release Observations, and their dedicated processing pipeline as an ESA led effort, have shown the enormous potential to explore the low surface brightness regimes, of great interest for the...
