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@ARTICLE{deOnaWilhelmi:619414,
      author       = {de Ona Wilhelmi, Emma Maria and López-Coto, Ruben and
                      Aharonian, Felix and Amato, Elena and Cao, Zhen and Gabici,
                      Stefano and Hinton, Jim},
      title        = {{T}he hunt for {P}e{V}atrons as the origin of the most
                      energetic photons observed in the {G}alaxy},
      reportid     = {PUBDB-2024-07619, arXiv:2404.16591},
      year         = {2024},
      note         = {Published in Nature Astronomy, Volume 8, pages 425-431
                      (2024)},
      abstract     = {Ultrarelativistic particles called cosmic rays permeate the
                      Milky Way, propagating through the turbulent Galactic
                      magnetic fields. The mechanisms under which these particles
                      increase their energy can be reasonably described by current
                      theories of acceleration and propagation of cosmic rays.
                      There are, however, still many open questions as to how to
                      reach petaelectronvolt (PeV) energies, the maximum energy
                      believed to be attained in our Galaxy, and in which
                      astrophysical sources (dubbed PeVatrons) this
                      ultrahigh-energy acceleration happens. In this Review, we
                      describe the theoretical conditions for plasma acceleration
                      to these energies and the Galactic sources in which these
                      conditions are possible. These theoretical predictions are
                      then compared to the latest experimental results,
                      summarizing the state of the art of our current knowledge of
                      PeVatrons. We finally describe the prospects to keep
                      advancing the understanding of these elusive objects, still
                      unidentified more than 100 years after the discovery of
                      cosmic rays.},
      keywords     = {plasma: acceleration (INSPIRE) / magnetic field: turbulence
                      (INSPIRE) / cosmic radiation: propagation (INSPIRE) / galaxy
                      (INSPIRE) / experimental results (INSPIRE) / gamma ray: VHE
                      (INSPIRE) / cosmic radiation: diffusion (INSPIRE) /
                      accelerator (INSPIRE) / cosmic radiation: UHE (INSPIRE) /
                      photon (INSPIRE)},
      cin          = {$Z_HESS$},
      ddc          = {520},
      cid          = {$I:(DE-H253)Z_HESS-20210408$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613)},
      pid          = {G:(DE-HGF)POF4-613},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2404.16591},
      howpublished = {arXiv:2404.16591},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2404.16591;\%\%$},
      url          = {https://bib-pubdb1.desy.de/record/619414},
}