Emission of whistler-mode waves and diffusion of electrons around interplanetary shocks

Journal Article · Sat Jul 20 04:00:00 EDT 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.51475· OSTI ID:21163508

Pierre, F; Solomon, J; Cornilleau-Wehrlin, N; Canu, P; Scime, E E; Phillips, J L; Balogh, A; Forsyth, R J ^[1]

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1. IAS/CNRS/Univ. Paris 11, Orsay (France)

We present a study of whistler-mode wave generation and wave particle interaction in the vicinity of interplanetary shocks in the ecliptic plane, as observed by the Ulysses spacecraft. Generally the whistler-mode waves (measured in the frequency range 0.22-448 Hz) are observed downstream of the shocks where they persist for some hours. From the electron distribution functions (EDF) in the energy range 1.6 to 862 eV, we compute the temperature anisotropy and the wave growth rate of the electromagnetic electron cyclotron instability for the case of parallel propagation of the waves with respect to the interplanetary magnetic field (IMF) B. In general, in agreement with the wave measurements, the instability grows only downstream of the shock fronts. Following the wave activity, velocity space diffusion of the electrons results in a marginally stable state with sporadic fluctuations.

• OSTI ID: 21163508
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 382; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANISOTROPY
ASTROPHYSICS
CYCLOTRON INSTABILITY
DIFFUSION
DISTRIBUTION FUNCTIONS
ELECTRON TEMPERATURE
ELECTRONS
EV RANGE
FLUCTUATIONS
INTERPLANETARY MAGNETIC FIELDS
PLASMA
PLASMA WAVES
VELOCITY
WAVE PROPAGATION
WHISTLER INSTABILITY