Banca de QUALIFICAÇÃO: CECILIA PEDERIVA SA SALES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : CECILIA PEDERIVA SA SALES
DATE: 29/12/2025
TIME: 09:30
LOCAL: Auditorio do Departamento de Geofísica
TITLE:

Investigation of kinetic signatures and energy conversion associated with reconnection in anti-parallel regimes using data from the MMS mission.

KEY WORDS:

Magnetic Reconnection, MMS (Magnetospheric Multiscale Mission), Electron Diffusion Region (EDR), Generalized Ohm’s Law.

PAGES: 59
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Geofísica
SPECIALTY: Aeronomia
SUMMARY:

Magnetic reconnection is a fundamental process responsible for converting magnetic energy into plasma energy, occurring in regions where the frozen-in condition is violated, allowing the topological restructuring of magnetic field lines. This mechanism, which accelerates and heats particles, plays a central role in the dynamics of Earth’s magnetosphere.

The Magnetospheric Multiscale Mission (MMS), launched in 2015, enabled detailed investigation of the microphysics of this process through high–temporal-resolution measurements capable of resolving the electron-scale dynamics within the Electron Diffusion Region (EDR).

In this work, we analyze dayside antiparallel magnetic reconnection events at the magnetopause, focusing on the identification and characterization of kinetic signatures, the calculation of non-ideal terms of the generalized Ohm’s law, and the quantification of electromagnetic-to-kinetic energy conversion in the plasma.

Burst-mode MMS data are employed, including measurements of magnetic and electric fields, particle velocities, pressure tensor, and current density. The methodology involves event classification and transformation into the local LMN coordinate system, used as the basis for computing the energy dissipation term and determining the contribution of the electron pressure tensor divergence.

Preliminary results provide a systematic analysis of the characteristic kinetic conditions of the EDR and suggest the possibility of comparative evaluation among additional events, motivating a statistical approach toward understanding the efficiency of energy conversion in different scenarios of antiparallel reconnection.

COMMITTEE MEMBERS:
Interno - 1235107 - GEORGE SANTOS MARINHO
Interno - 2411277 - MANILO SOARES MARQUES
Externo à Instituição - PAULO ROBERTO JAUER - INPE