@InProceedings{DeggeroniSilvSilvMarc:2022:CaSt,
author = "Deggeroni, Vinicius and Silva, Ligia Alves da and Silva, Marlos
Rockenbach da and Marchezi, Jos{\'e} Paulo",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Chinese Academy of Sciences}",
title = "The role of the whistler-mode chorus waves in the relativistic
electron flux variability of the outer radiation belt under the
influence of Coronal Mass Ejection: a case study",
year = "2022",
organization = "AGU Fall Meeting",
publisher = "AGU",
abstract = "The dynamic of Earth's magnetosphere can be disturbed by solar
wind structures, such as Coronal Mass Ejection - CME, and change
the dynamic of the outer and inner magnetosphere. Those
perturbations can generate waves in a wide frequency range, such
as whistler-mode chorus waves (from hundreds of Hz up to tens
kHz), which can be observed almost simultaneously with the arrival
of solar wind structures in the magnetosphere. It means that the
trapped particles' dynamic in the outer radiation belt can be
violated, causing a direct impact on the population of the outer
radiation belt, which is formed primarily by electrons. This
impact may occur from different dynamic mechanisms, such as radial
diffusion, pitch-angle scattering, magnetopause shadowing, and
others. The main goal of this case study, which occurred on
October 12, 2012, is to identify the pitch-angle scattering
mechanism from the resonance between chorus and relativistic
electrons using the Van Allen probes and ACE satellite data. The
outer radiation belt's electron flux enhancement (flux increase)
and dropout (flux decrease) are analyzed from the characterization
of the wave packets (sub-elements) and the calculation of the Wave
Normal Angle (WNA) during the influence of a CME. Therefore, this
work will characterize the wave's sub-elements during the dropout
and enhancement of the outer radiation belt to identify the main
differences in the physical processes responsible for the
high-energy electron flux variability in the outer radiation
belt.",
conference-location = "Chicago, IL",
conference-year = "12-16 Dec. 2022",
urlaccessdate = "19 maio 2024"
}