Modeling of GeV-TeV gamma-ray emission of Cygnus Cocoon

OB-associations and superbubbles being energetically essential galactic powerhouses are likely to be the important acceleration sites of cosmic rays (CRs). The emission profile gamma-ray sources related stellar clusters indicates on continuous particle by winds massive stars. One most luminous is Cygnus Cocoon superbubble, observed multiple instruments, such as Fermi-LAT, ARGO, and, recently, HAWC. We discuss a model transport in superbubble explain GeV-TeV spectrum Cocoon, which has break at energy about 1 TeV. It shown that gamma produced hadronic interactions high-energy protons accelerated an ensemble shocks from stars supernovae can observations. proton spectral shape highest energies depends MHD-fluctuation Cocoon. viable solutions for may applied some other associations showing similar behaviour. briefly similarity differences processes extended compact young represented Westerlund 2 sources.