Star-forming environments such as StarBurst Galaxies (SBGs),
due to their high rate of supernova explosions, are expected to be very
efficient producers of high-energy gamma-rays and neutrinos via hadronic
interactions. In this talk, I will briefly review the transport of
cosmic-rays in astrophysical environments and the production mechanisms
of high-energy neutrinos and gamma-rays. I will then investigate the
point-like and diffuse emission from local SBGs and their whole
population in light of the latest Fermi-LAT and IceCube measurements. I
will also discuss forecasts for future gamma-ray and neutrino
telescopes, quantifying the potentiality of upcoming measurements to
probe the hadronic nature of these sources and to discriminate among
different CR transport models. Finally, I will explore the modifications
of the standard astrophysical emission in beyond-the-standard-model
scenarios and place novel constraints on the parameter space of sub-GeV
dark matter particles.
