Processes associated with particle transport in corotating interaction regions and near stream interfaces

D. S. Intriligator, J. Randy Jokipii, T. S. Horbury, J. M. Intriligator, R. J. Forsyth, H. Kunow, G. Wibberenz, J. T. Gosling

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Pioneer and Ulysses observations of energetic particles and solar wind plasma and magnetic fields are analyzed to study particle transport in corotating interaction regions (CIRs) and near stream interfaces (SIs). Energetic particle diffusion with a lowered coefficient near the SIs as compared with the free solar wind may account for the energetic particle profiles in CIRs and for the modulation of Jovian electrons. Our analyses include examination of the magnetic power and variances perpendicular and parallel to the magnetic field for a range of wave numbers and for a range of conditions within two CIRs. Since the magnetic field immediately on either side of a SI, but near it, is not connected to either the forward shock or reverse shock, it is the cross-field motion of the energetic particles that is relevant. Since the cross-field transport is thought to be related to field line mixing, or random walk, we examined magnetic field fluctuations normal to the average field to determine whether any signature of reduced perpendicular particle transport could be found. Evidence consistent with reduced particle transport near the SI was indeed found when we examined time series of the 1-min averages of the magnetic field components. A planar magnetic structure was associated with the trailing unshocked layer following the SIs (i.e., SI to SI + 12 hours) and also with the entire CIRs, but it was not present in the free solar wind. We have quantitatively examined the effects of shear and compression on particle transport and conclude that the effects of shear and compression reduce particle transport in CIRs and in the vicinity of SIs.

Original languageEnglish (US)
Article number2000JA000070
Pages (from-to)10625-10634
Number of pages10
JournalJournal of Geophysical Research: Space Physics
Volume106
Issue numberA6
StatePublished - Jun 1 2001

Fingerprint

Solar wind
Magnetic fields
energetic particles
magnetic field
interactions
energetics
solar wind
magnetic fields
Magnetic structure
shock
Time series
shear
compression
particle diffusion
Modulation
particle
Plasmas
random walk
Electrons
examination

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography

Cite this

Intriligator, D. S., Jokipii, J. R., Horbury, T. S., Intriligator, J. M., Forsyth, R. J., Kunow, H., ... Gosling, J. T. (2001). Processes associated with particle transport in corotating interaction regions and near stream interfaces. Journal of Geophysical Research: Space Physics, 106(A6), 10625-10634. [2000JA000070].

Processes associated with particle transport in corotating interaction regions and near stream interfaces. / Intriligator, D. S.; Jokipii, J. Randy; Horbury, T. S.; Intriligator, J. M.; Forsyth, R. J.; Kunow, H.; Wibberenz, G.; Gosling, J. T.

In: Journal of Geophysical Research: Space Physics, Vol. 106, No. A6, 2000JA000070, 01.06.2001, p. 10625-10634.

Research output: Contribution to journalArticle

Intriligator, DS, Jokipii, JR, Horbury, TS, Intriligator, JM, Forsyth, RJ, Kunow, H, Wibberenz, G & Gosling, JT 2001, 'Processes associated with particle transport in corotating interaction regions and near stream interfaces', Journal of Geophysical Research: Space Physics, vol. 106, no. A6, 2000JA000070, pp. 10625-10634.
Intriligator DS, Jokipii JR, Horbury TS, Intriligator JM, Forsyth RJ, Kunow H et al. Processes associated with particle transport in corotating interaction regions and near stream interfaces. Journal of Geophysical Research: Space Physics. 2001 Jun 1;106(A6):10625-10634. 2000JA000070.
Intriligator, D. S. ; Jokipii, J. Randy ; Horbury, T. S. ; Intriligator, J. M. ; Forsyth, R. J. ; Kunow, H. ; Wibberenz, G. ; Gosling, J. T. / Processes associated with particle transport in corotating interaction regions and near stream interfaces. In: Journal of Geophysical Research: Space Physics. 2001 ; Vol. 106, No. A6. pp. 10625-10634.
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