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Record Details

Record 5 of 230
Pick-up ion pressure gradients modulating the solar wind dynamics
Author and Affiliation:
Fahr, Hans J.(Bonn Univ., Inst. fuer Astrophysik und Extraterrestrische Forschung., Germany)
Fichtner, Horst(Bonn Univ., Inst. fuer Astrophysik und Extraterrestrische Forschung., Germany)
Abstract: Neutral interstellar atoms penetrate deeply into the inner heliosphere before they become ionized by various processes. As ions they are picked-up by the frozen-in magnetic fields and are convected outwards with the solar wind plasma. Thereby the primary plasma flow is mass, momentum, and energy-loaded. The dynamics of the distant multi-constituent solar wind is, however, not solely determined by these loading processes, but is also affected by the wave-mediated pick-up ion pressure gradients derivable from the pick-up ion distribution function. The action of the radial components of these pressures essentially counter balances the decelerating effect of the solar wind momentum loading, diminishing strongly the deceleration of the distant solar wind. Furthermore the latitudinal components of the pick-up ion pressures induce latitudinal forces acting on the multiconstituent solar plasma outflow and inducing nonradial bulk flow components. The enforced nonradial outflow geometry on the upwind hemisphere may partly be responsible for the magnetic flux deficit which was claimed since several years in the PIONEER-10 magnetic flux data.
Publication Date: Jun 30, 1995
Document ID:
19960021498
(Acquired Jun 05, 1996)
Accession Number: 96N24894
Subject Category: SOLAR PHYSICS
Document Type: Conference Paper
Publication Information: International Solar Wind 8 Conference; 106; (NASA-CR-199940); (SEE 19960021255)
Financial Sponsor: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA United States
Organization Source: Bonn Univ.; Inst. fuer Astrophysik und Extraterrestrische Forschung.; Germany
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ION DISTRIBUTION; IONS; PLASMA INTERACTIONS; PRESSURE GRADIENTS; SOLAR WIND; SOLAR MAGNETIC FIELD; HELIOSPHERE; MAGNETIC FLUX; NEUTRAL ATOMS; MAGNETOHYDRODYNAMIC FLOW
Availability Source: Other Sources
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