Plasma rest frame frequencies and polarizations of the low-frequency upstream waves: ISEE 1 and 2 observations

Journal Article · Tue Mar 01 04:00:00 EST 1983 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA088iA03p02021· OSTI ID:6239430

Hoppe, M M; Russell, C T

Using magnetic field data from the dual ISEE 1 and 2 spacecraft we have determined the plasma rest frame frequencies and polarizations of the large amplitude low frequency (0.03 Hz) upstream waves. The monochromatic sinusoidal waves associated with 'intermediate' ion fluxes are magnetosonic waves with rest frame frequencies approx.0.1 ..cap omega../sub P/ and wavelengths approx.1 R/sub E/. The obliquely propagating 'shocklet' form of the waves is also predominantly in the magnetosonic mode, but occasionally also appears in the Alfven mode with similar rest frame frequency and wavelength. The generation of the magnetosonic mode has been explained by the well established cyclotron resonance mechanism driven by narrow reflected ion beams but the concurrent observation of Alfven mode waves appears to require wave generation by the more isotropic diffuse ion distributions as well.

• Research Organization: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90024
• OSTI ID: 6239430
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 88:A3; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALFVEN WAVES
EARTH ATMOSPHERE
HYDROMAGNETIC WAVES
INTERPLANETARY MAGNETIC FIELDS
MAGNETIC FIELDS
MAGNETOACOUSTIC WAVES
MAGNETOSPHERE
POLARIZATION
REFLECTION
SHOCK WAVES
SOLAR ACTIVITY
SOLAR WIND
WAVE PROPAGATION
WAVELENGTHS