@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 = "27 abr. 2024"
}