@AudiovisualMaterial{MarcheziAlSiSiKaBa:2018:InReEl,
abstract = "The particles trapped in the Earth's magnetic field perform three
typical movements: gyromotion around the magnetic field line,
bouncing along the magnetic field line and drifting across the
magnetic field lines. Each movement has a characteristic time and
constant of motion called the adiabatic invariant. The solar wind
perturbations can interact with the Earth's magnetosphere and
generate waves that have frequencies resonant with the
characteristic frequencies of the adiabatic motion. With
frequencies in the same range as those of the particle drift,
ultra-low frequency (ULF) waves are known to cause significant
changes in the energetic particle flux in the outer radiation
belts. On 09 February 2014, the ACE satellite detected solar wind
plasma and Interplanetary Magnetic Field (IMF) perturbations
related to an Interplanetary Mass Ejection (ICME) followed by a
High Speed Solar Wind Stream (HSS) event. In this work, we analyze
the recovery of relativistic outer radiation belt electron flux
after the interaction of a complex interplanetary structure with
the Earths magnetosphere. We are interested in the HSS period,
around 18:00 UT, when the outer radiation belt electrons flux
density exhibited a gradual increase only a few hours after the
interplanetary structure arrived. The electron flux density data
where obtained by the Relativistic Electron Proton Telescope
(REPT) instrument, onboard of the Van Allen Probes. For that
period, the Probes where located at MLT ~ 15 and L ~ 5. The
north-south solar wind magnetic field is characterized by a
predominantly negative Bz and Alfv{\'e}nic fluctuations. The main
focus here is to evaluate the role of each ULF wave frequency
range, corresponding to Pc3, Pc4 and Pc5, in accelerating outer
radiation belt electrons. Observations show an increase in the ULF
wave power spectrum density for the electric and magnetic fields
at the Van Allen Probes corresponding to an enhancement of the
electron flux density with energies from 1.80 up to 3.40 MeV. This
may indicate that ULF waves play a more important role on the
acceleration process for this complex event.",
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 {NASA Goddard Space Flight Center} and {University of
Colorado}",
author = "Marchezi, Jos{\'e} Paulo and Alves, Livia Ribeiro and Silva,
Ligia Alves da and Sibeck, David G. and Kanekal, Shrikanth G. and
Baker, Daniel N.",
city = "Washington, D. C.",
conferencename = "AGU Fall Meeting",
date = "10-14 dec.",
language = "en",
publisher = "Instituto Nacional de Pesquisas Espaciais",
publisheraddress = "S{\~a}o Jos{\'e} dos Campos",
targetfile = "marchezi_increase_poster.pdf",
title = "Increase in relativistic electron flux density during an complex
interplanetary structure on 09 February 2014",
year = "2018",
urlaccessdate = "03 maio 2024"
}