Luigi Tibaldo - Star-forming regions as cosmic-ray accelerators and gamma-ray sources
The standard supernova remnant paradigm for the origin of Galactic cosmic rays is challenged by the increasing precision of observations that are pushing us to consider alternative classes of sources. Massive star-forming regions are now recognised as a new class of gamma-ray sources by current-generation telescopes, underscoring their importance as particle accelerators. In this talk, I will discuss recent advances in our understanding of cosmic-ray acceleration and transport in these environments, with particular emphasis on insights from gamma-ray observations of archetypal massive star-forming regions such as Cygnus X and Westerlund 1. I will also present ideas and ongoing efforts to systematise the study of gamma-ray emission from star-forming regions through comparisons between gamma-ray observations and multiwavelength catalogues.