Physics
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..479m&link_type=abstract
The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 479-482 (1999).
Physics
2
Magnetosphere Interactions
Scientific paper
Destabilization of the whistler mode by electrons possessing both a temperature anisotropy and a power law tail in particle energy is investigated employing a generalized bi-Lorentzian velocity distribution for the electrons. Such a velocity distribution is a good model for the high energy part of the electron distribution upstream of the Earth's bow shock and in the foreshock. It is found that the generalized bi-Lorentzian distribution is much more strongly unstable to the generation of parallel whistlers than is a bi-Maxwellian with similar temperature anisotropy. The excited wavenumbers and frequencies are smaller than they are for a bi-Maxwellian. It is suggested that this instability might play a role in the generation of some of the low to intermediate frequency (90Ωi<ω<400Ωi) whistler bursts observed upstream of the Earth's bow shock and in the foreshock.
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