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@Article{MedeirosSVSHKSAMDJSMADFKBK:2019:CoEMWa,
               author = "Medeiros, Cl{\'a}udia and Souza, Vitor Moura Cardoso e Silva and 
                         Vieira, Luis Eduardo Antunes and Sibeck, D. G. and Haldord, A. J. 
                         and Kang, S. B. and Silva, L. A. da and Alves, Livia Ribeiro and 
                         Marchezi, Jos{\'e} Paulo and Dallaqua, Renato S{\'e}rgio and 
                         Jauer, Paulo Ricardo and Silva, Marlos Rockenbach da and Mendes, 
                         Odim and Alves, Maria Virginia and Dal Lago, Alisson and Fok, M. 
                         C. and Kanekal, S. G. and Baker, D. N. and Kletzing, C. A.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {NASA Goddard Space Flight Center} 
                         and Space Sciences Department, The Aerospace Corporation and {NASA 
                         Goddard Space Flight Center} and National Space Science Center, 
                         Chinese Academy of Sciences and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {NASA Goddard Space Flight Center} and {NASA Goddard 
                         Space Flight Center} and {University of Colorado Boulder} and 
                         {University of Iowa}",
                title = "On the contribution of EMIC waves to the reconfiguration of the 
                         relativistic electron butterfly pitch angle distribution shape on 
                         2014 September 12- a case study",
              journal = "Astrophysical Journal",
                 year = "2019",
               volume = "872",
               number = "1",
                pages = "e36",
                month = "Feb.",
             keywords = "acceleration of particles, Earth, planets and satellites: magnetic 
                         fields, scattering, waves.",
             abstract = "Following the arrival of two interplanetary coronal mass ejections 
                         on 2014 September 12, the Relativistic Electron-Proton Telescope 
                         instrument on board the twin Van Allen Probes observed a long-term 
                         dropout in the outer belt electron fluxes. The interplanetary 
                         shocks compressed the magnetopause, thereby enabling the loss of 
                         relativistic electrons in the outer radiation belt to the 
                         magnetosheath region via the magnetopause shadowing. Previous 
                         studies have invoked enhanced radial transport associated with 
                         ultra-low-frequency waves activity and/or scattering into the 
                         atmosphere by whistler mode chorus waves to explain electron 
                         losses deep within the magnetosphere (L. <. 5.5). We show that 
                         energetic electron pitch angle distributions (PADs) provide strong 
                         evidence for precipitation also via interaction with 
                         electromagnetic ion cyclotron (EMIC) waves. High-resolution 
                         magnetic field observations on Van Allen Probe B confirm the 
                         sporadic presence of EMIC waves during the most intense dropout 
                         phase on September 12. Observational results suggest that 
                         magnetopause shadowing and EMIC waves together were responsible 
                         for reconfiguring the relativistic electron PADs into peculiar 
                         butterfly PAD shapes a few hours after an interplanetary shock 
                         arrived at Earth.",
                  doi = "10.3847/1538-4357/aaf970",
                  url = "http://dx.doi.org/10.3847/1538-4357/aaf970",
                 issn = "0004-637X and 1538-4357",
             language = "en",
           targetfile = "medeiros_contribution.pdf",
        urlaccessdate = "26 nov. 2020"
}


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