Numerical simulations on electromagnetic emissions driven by multiple electon beams associated to potential geoeffective solar phenomena

• Grant number: 08/01288-0
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): July 01, 2008
• Effective date (End): May 31, 2010
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geophysics
• Principal researcher: Maria Virginia Alves
• Grantee: Fernando Jaques Ruiz Simões Junior
• Home Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia e Inovações (Brasil). São José dos Campos , SP, Brazil

Abstract

During the last 60s years, systematic observations (in situ) of plasma parameters and magnetic field in the solar wind near the Earth has been performed. The data obtained combined with the ones obtained from Solar observations has help us to understand that the origin of the most important magnetic storms are related with transient solar phenomena. Magnetic storms are associated with an intense and long duration of the southward component of interplanetary magnetic field that facilitate the energetic coupling solar wind-Earth magnetosphere by magnetic reconnection. In this contest, radio emission can occur associated with magnetic structures traveling in the interplanetary medium ejected from the Sun. In this work we will use computer simulation to understand the physical process of radio emission generated by potentially geoeffective phenomena. Some radio emissions generated by this kind of phenomena are characterized by a main frequency, near of local plasma frequency and harmonics of this one. Recent theories suggest that this kind of waves can be generated by multiples electron beams that are injected into interplanetary medium during solar eruptive events. Particle simulation (PIC-code) will be used to study wave-particle and wave-wave interaction. In particular we focus on spatio-temporal evolution of electromagnetic waves generated by Langmuir wave packages resulting from the interaction of multiples electron beams with solar wind plasma associated with type II and III solar radio bursts.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DA COSTA, JR., EDIO; TSURUTANI, BRUCE T.; ALVES, MARIA VIRGINIA; ECHER, EZEQUIEL; LAKHINA, GURBAX S. CROSS-FIELD DIFFUSION OF ENERGETIC (100 keV to 2 MeV) PROTONS IN INTERPLANETARY SPACE. ASTROPHYSICAL JOURNAL, v. 778, n. 2 DEC 1 2013. Web of Science Citations: 4.

COSTA, JR., E.; ECHER, E.; ALVES, M. V.; TSURUTANI, B. T.; SIMOES, JR., F. J. R.; CARDOSO, F. R.; LAKHINA, G. S. A computational study of nonresonant cross-field diffusion of energetic particles due to their interaction with interplanetary magnetic decreases. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, v. 73, n. 11-12, SI, p. 1405-1409, JUL 2011. Web of Science Citations: 3.

SIMOES, JR., F. J. R.; ALVES, M. V.; CARDOSO, F. R.; COSTA, JR., E. Influence of electron nongyrotropy and anisotropy on parallel wave propagation: Numerical solution of dispersion relation. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, v. 73, n. 11-12, SI, p. 1511-1519, JUL 2011. Web of Science Citations: 2.