Observation of magnetospheric relativistic electrons accelerated by Pc-5 ULF waves
| dc.contributor.author | Tan, Lun C. | |
| dc.contributor.author | Fung, Shing F. | |
| dc.contributor.author | Shao, Xi | |
| dc.date.accessioned | 2021-07-29T20:17:21Z | |
| dc.date.available | 2021-07-29T20:17:21Z | |
| dc.date.issued | 2004-07-20 | |
| dc.description.abstract | Magnetic field, electric field and energetic electron measurements from CRRES, GOES-6 and -7 satellites are used to investigate the production of up to 2 MeV electron fluxes through a storm sudden commencement (SSC) event on August 27, 1991. Strong Pc-5 oscillations, whose electric field is mainly along the radial direction, and up to an order-of-magnitude enhancement in relativistic electron fluxes occurred simultaneously in a two-hour period. The enhanced electron fluxes are found to have a pancake-like pitch angle distribution, which is consistent with the fluxes being accelerated near the equatorial plane. The electron acceleration is shown to result from drift-resonant interactions with the toroidal-mode Pc-5 ULF waves having wave frequencies three times the electron drift frequency. In view of the L-variation of ULF wave frequencies, electron acceleration to relativistic energies becomes more effective in the geosynchronous region. | en |
| dc.description.sponsorship | The authors thank A. L. Vampola for archiving the CRRES-MEA data at the National Space Science Data Center. This work was partially supported by NASA contract NAS 5-97059 and NASA RTOP 784-50-51-02. | en |
| dc.description.uri | https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2004GL019459 | en |
| dc.format.extent | 5 pages | en |
| dc.genre | journal articles | en |
| dc.identifier | doi:10.13016/m2yovm-khm8 | |
| dc.identifier.citation | Tan, Lun C.; Fung, Shing F.; Shao, Xi; Observation of magnetospheric relativistic electrons accelerated by Pc-5 ULF waves; Geophysical Research Letters, 31, 14, 20 July, 2004; https://doi.org/10.1029/2004GL019459 | en |
| dc.identifier.uri | https://doi.org/10.1029/2004GL019459 | |
| dc.identifier.uri | http://hdl.handle.net/11603/22222 | |
| dc.language.iso | en | en |
| dc.publisher | American Geophysical Union | en |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Goddard Planetary Heliophysics Institute (GPHI) | |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | Observation of magnetospheric relativistic electrons accelerated by Pc-5 ULF waves | en |
| dc.type | Text | en |