FAST observations of VLF waves in the auroral zone: Evidence of very low plasma densities

R. J. Strangeway; L. Kepko; R. C. Elphic; C. W. Carlson; R. E. Ergun; J. P. McFadden; W. J. Peria; G. T. Delory; C. C. Chaston; M. Temerin; C. A. Cattell; E. Möbius; L. M. Kistler; D. M. Klumpar; W. K. Peterson; E. G. Shelley; R. F. Pfaff

doi:10.1029/98GL00664

FAST observations of VLF waves in the auroral zone: Evidence of very low plasma densities

R. J. Strangeway, L. Kepko, R. C. Elphic, C. W. Carlson, R. E. Ergun, J. P. McFadden, W. J. Peria, G. T. Delory, C. C. Chaston, M. Temerin, C. A. Cattell, E. Möbius, L. M. Kistler, D. M. Klumpar, W. K. Peterson, E. G. Shelley, R. F. Pfaff

Physics and Astronomy (Twin Cities)

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Abstract

The Fast Auroral SnapshoT (FAST) explorer frequently observes the auroral density cavity, which is the source region for Auroral Kilometric Radiation (AKR). An important factor in the generation of AKR is the relative abundance of hot and cold electrons within the cavity, since hot electrons introduce relativistic modifications to the wave dispersion. VLF wave-form data acquired by FAST within the auroral density cavity show clear signatures of whistler-mode waves propagating on the resonance cone. This allows us to obtain the electron plasma frequency, and the cavity often has densities < 1 cm^-3. Moreover, the hot electrons can be the dominant electron species, enabling AKR to be generated below the cold electron gyro-frequency.

Original language	English (US)
Pages (from-to)	2065-2068
Number of pages	4
Journal	Geophysical Research Letters
Volume	25
Issue number	12
DOIs	https://doi.org/10.1029/98GL00664
State	Published - 1998

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Strangeway, R. J., Kepko, L., Elphic, R. C., Carlson, C. W., Ergun, R. E., McFadden, J. P., Peria, W. J., Delory, G. T., Chaston, C. C., Temerin, M., Cattell, C. A., Möbius, E., Kistler, L. M., Klumpar, D. M., Peterson, W. K., Shelley, E. G., & Pfaff, R. F. (1998). FAST observations of VLF waves in the auroral zone: Evidence of very low plasma densities. Geophysical Research Letters, 25(12), 2065-2068. https://doi.org/10.1029/98GL00664

Strangeway, RJ, Kepko, L, Elphic, RC, Carlson, CW, Ergun, RE, McFadden, JP, Peria, WJ, Delory, GT, Chaston, CC, Temerin, M, Cattell, CA, Möbius, E, Kistler, LM, Klumpar, DM, Peterson, WK, Shelley, EG & Pfaff, RF 1998, 'FAST observations of VLF waves in the auroral zone: Evidence of very low plasma densities', Geophysical Research Letters, vol. 25, no. 12, pp. 2065-2068. https://doi.org/10.1029/98GL00664

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abstract = "The Fast Auroral SnapshoT (FAST) explorer frequently observes the auroral density cavity, which is the source region for Auroral Kilometric Radiation (AKR). An important factor in the generation of AKR is the relative abundance of hot and cold electrons within the cavity, since hot electrons introduce relativistic modifications to the wave dispersion. VLF wave-form data acquired by FAST within the auroral density cavity show clear signatures of whistler-mode waves propagating on the resonance cone. This allows us to obtain the electron plasma frequency, and the cavity often has densities < 1 cm-3. Moreover, the hot electrons can be the dominant electron species, enabling AKR to be generated below the cold electron gyro-frequency.",

author = "Strangeway, {R. J.} and L. Kepko and Elphic, {R. C.} and Carlson, {C. W.} and Ergun, {R. E.} and McFadden, {J. P.} and Peria, {W. J.} and Delory, {G. T.} and Chaston, {C. C.} and M. Temerin and Cattell, {C. A.} and E. M{\"o}bius and Kistler, {L. M.} and Klumpar, {D. M.} and Peterson, {W. K.} and Shelley, {E. G.} and Pfaff, {R. F.}",

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AU - Strangeway, R. J.

AU - Kepko, L.

AU - Elphic, R. C.

AU - Carlson, C. W.

AU - Ergun, R. E.

AU - McFadden, J. P.

AU - Peria, W. J.

AU - Delory, G. T.

AU - Chaston, C. C.

AU - Temerin, M.

AU - Cattell, C. A.

AU - Möbius, E.

AU - Kistler, L. M.

AU - Klumpar, D. M.

AU - Peterson, W. K.

AU - Shelley, E. G.

AU - Pfaff, R. F.

PY - 1998

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ER -

FAST observations of VLF waves in the auroral zone: Evidence of very low plasma densities

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