Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29x..86t&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 24, pp. 86-1, CiteID 2233, DOI 10.1029/2002GL015652
Physics
21
Interplanetary Physics: Interplanetary Magnetic Fields, Interplanetary Physics: Sources Of The Solar Wind, Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: Discontinuities
Scientific paper
Solar wind protons detected within Magnetic Holes (MHs) and Magnetic Decreases (MDs) are found to be preferentially heated perpendicular to B0. The MHs/MDs are associated with the phase-steepened edges of nonlinear Alfvén waves. The proton anisotropies can lead to the proton cyclotron and mirror mode plasma instabilities. We examine the Ponderomotive Force (PF), a phenomenon due to wave pressure gradients, and show that for this plasma regime and for phase-steepened Alfvén waves, the PF proton acceleration/energization will primarily be orthogonal to B0. It is suggested that accelerated ions create the MHs/MDs by a diamagnetic effect.
Arballo John K.
Buti B.
Dasgupta Basudeb
Galvan Carlos
Goldstein Bruce E.
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