Acceleration Potential of a Cygnus Star Forming Region with HAWC data

The Fermi-LAT detected an extended gamma-ray emission located in the star forming (SFR) region of Cygnus X and attributed to a possible superbubble with freshly accelerated cosmic rays (CRs). The emission region is surrounded by ionization fronts as in a cocoon. Hence, it has been named the "Cygnus cocoon". One theory behind the origin of CRs in the cocoon is that they originate in the OB2 association and are accelerated at the interaction sites of stellar winds of massive O type stars. This supports the hypothesis of SFRs as possible sources of cosmic rays in our galaxy. So far, this cocoon has been only detected at GeV energies. A TeV gamma-ray source 2HWC J2031+415, detected by the HAWC observatory is co-located with the cocoon. Spectral and morphological studies of the region with HAWC and Fermi-LAT data reveal the HAWC source as a likely counterpart of the cocoon. Using HAWC data, we are able to probe the maximum energy to which cosmic rays are accelerated in the Cygnus OB2 SFR.