Ion distributions in coronal holes and fast solar wind

Journal Article · Thu Mar 25 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3395842· OSTI ID:21371714

Maneva, Y G; Marsch, E ^[1]; Araneda, J A ^[2]

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1. Max-Planck-Institut fuer Sonnensystemforschung, 37191 Katlenburg-Lindau (Germany)
2. Departamento de Fisica, Facultad de Ciencias Fisicas y Matematicas, Universidad de Concepcion, Concepcion (Chile)

We perform 1 D hybrid simulations to investigate the nonlinear kinetic behavior of the tenuous collisionless magnetized plasma in coronal holes and fast solar wind. Initially isotropic ion distributions are reshaped via wave-particle interactions with resonant daughter waves that are born by parametrically unstable large-amplitude Alfven-cyclotron waves. Decay processes lead to the formation of both acoustic and electromagnetic micro-turbulence, which further influence the motion of the ions via Landau damping and pitch-angle scattering. This leads to a depletion of the pump and destroys the fluid coherence of the medium. Parametric instabilities act to randomize the ion distributions, causing anisotropic heating and resulting in differential streaming and formation of ion beams. Due to their low mass densities and charge-to-mass ratios heavy ions are preferentially heated and obtain higher anisotropies than protons.

• OSTI ID: 21371714
• Journal Information: AIP Conference Proceedings, Vol. 1216, Issue 1; Conference: 12. international solar wind conference, Saint-Malo (France), 21-26 Jun 2009; Other Information: DOI: 10.1063/1.3395842; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ALFVEN WAVES
ANISOTROPY
ASTROPHYSICS
COLLISIONLESS PLASMA
COMPUTERIZED SIMULATION
HEAVY IONS
ION BEAMS
LANDAU DAMPING
MAGNETISM
MAGNETOHYDRODYNAMICS
NONLINEAR PROBLEMS
PARAMETRIC INSTABILITIES
PLASMA SIMULATION
SOLAR WIND
TURBULENCE
BEAMS
CHARGED PARTICLES
DAMPING
FLUID MECHANICS
HYDRODYNAMICS
HYDROMAGNETIC WAVES
INSTABILITY
IONS
MECHANICS
PHYSICS
PLASMA
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
SIMULATION
SOLAR ACTIVITY
STELLAR ACTIVITY
STELLAR WINDS