Cosmic Ray Accelerators in the Large Magellanic Cloud

I point out a correlation between the ~100 MeV-10 GeV gamma-ray emissivity and the historical star formation rate (SFR) in the Large Magellanic Cloud (LMC) ~12.5 Myr ago. This correlation bolsters the view that cosmic rays (CRs) in the LMC may be accelerated by conglomerations of supernova remnants (i.e., superbubbles), although it cannot yet be ruled out that other objects—also residing in such high SFR regions—may be responsible for accelerating the particles: indeed, most energetic objects capable of accelerating CRs are expected to reside in high SFR regions.