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@Article{LobatoCoelMalh:2017:UlEnCo,
               author = "Lobato, Ronaldo V. and Coelho, Jaziel Goulart and Malheiro, M.",
          affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)}",
                title = "Ultra-high energy cosmic rays from white dwarf pulsars and the 
                         Hillas criterion",
              journal = "Journal of Physics: Conference Series",
                 year = "2017",
               volume = "861",
               number = "1",
                pages = "012005",
                month = "june",
             abstract = "The origins of ultra-high-energy cosmic rays (E \≳ 1019 eV) 
                         are a mystery and still under debate in astroparticle physics. In 
                         recent years some efforts were made to understand their nature. In 
                         this contribution we consider the possibility of Some Soft Gamma 
                         Repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs) beeing white 
                         dwarf pulsars, and show that these sources can achieve large 
                         electromagnetic potentials on their surface that accelerate 
                         particle almost at the speed of light, with energies E \∼ 
                         1020-21 eV. The sources SGRs/AXPs considered as highly magnetized 
                         white dwarfs are well described in the Hillas diagram, lying close 
                         to the AR Sorpii and AE Aquarii which are understood as white 
                         dwarf pulsars.",
                  doi = "10.1088/1742-6596/861/1/012005",
                  url = "http://dx.doi.org/10.1088/1742-6596/861/1/012005",
                 issn = "1742-6588",
             language = "en",
           targetfile = "lobato_ultra.pdf",
        urlaccessdate = "24 nov. 2020"
}


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