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Statistical study of possible Europa control of Jupiter decametric radio emissions

Grant number: 19/03533-6
Support type:Scholarships in Brazil - Master
Effective date (Start): July 01, 2019
Effective date (End): May 31, 2020
Field of knowledge:Physical Sciences and Mathematics - Geosciences
Principal researcher:Ezequiel Echer
Grantee:Hadassa Raquel Peixoto Jácome
Home Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia e Inovações (Brasil). São José dos Campos , SP, Brazil
Associated scholarship(s):19/16268-9 - Statistical study of possible Europa control of the decametric radio emissions of Jupiter, BE.EP.MS

Abstract

Jupiter is a powerful source of Decametric radio (DAM) emission, whose origin is associated to electron precipitation by Cyclotron-Maser Instability (CMI). It has been known for decades that the location of the satellite Io affects Jupiter's DAM emissions, which is explained by the Io-Jupiter electromagnetic interaction. The flow of Jupiter's magnetospheric plasma carrying magnetic field onto the satellite produces field-aligned currents which are propagated to Jupiter's ionosphere by Alfvén waves. Those currents transport energy to the ionosphere, causing bright spots of ultraviolet emissions at the satellite's footprint. Thus, the identification of the bright spots in Ganymede and Europa's footprints with UV observations indicates that the same interaction occurs between each of these satellites and Jupiter, and, then, that they also may control Jupiter's DAM emissions. Recently, Ganymede's control of the DAM emissions have been identified and evidence of control by Europa has also been observed. Therefore, the main objective of this research project is to investigate the possible control of Jupiter DAM emissions by Europa using the radio database from the Nançay Decametric Array (NDA), and to make a statistical analysis of the properties of the Europa-dependent emissions (Eu-DAM). (AU)

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