Analysis of large scale MHD quantities in expanding magnetic clouds

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Magnetic clouds (MCs) transport the magnetic flux and helicity released by the Sun. They are generally modeled as a static flux rope traveling in the solar wind, though they can present signatures of expansion. We analyze three expanding MCs using a self-similar free radial expansion model with a cy...

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Detalles Bibliográficos
Autores principales: Nakwacki, M.S., Dasso, S., Mandrini, C.H., Démoulin, P.
Formato: JOUR
Materias:
Driver gases
Ejecta
Interplanetary magnetic fields
Magnetic clouds
Clouds
Flux pinning
Fluxes
Magnetic devices
Magnetic fields
Magnetic flux
Magnetism
Mechanics
Modal analysis
Solar energy
Solar wind
Static analysis
Wind power
Elsevier (CO)
Expansion model
Flux ropes
Free fields
Helicity
Initial conditions
Large scales
Magnetic (CE)
Magnetic clouds (MC)
Magnetic energies
Magnetic helicity
Per unit length
Radial expansions
Self similar
Magnetic materials
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_13646826_v70_n10_p1318_Nakwacki
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Magnetic clouds (MCs) transport the magnetic flux and helicity released by the Sun. They are generally modeled as a static flux rope traveling in the solar wind, though they can present signatures of expansion. We analyze three expanding MCs using a self-similar free radial expansion model with a cylindrical linear force-free field (i.e., Lundquist solution) as the initial condition. We derive expressions for the magnetic fluxes, the magnetic helicity and the magnetic energy per unit length along the flux tube. We find that these quantities do not differ more than 25 % when using the static or expansion model. © 2008 Elsevier Ltd. All rights reserved.

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