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| Titel |
Wind Observations of Wave Heating and/or Particle Energization at Supercritical Interplanetary Shocks |
| VerfasserIn |
Lynn Bruce Wilson III, Adam Szabo, Andriy Koval, Cynthia A. Cattell, Paul J. Kellogg, Keith Goetz, Aaron Breneman, Kris Kersten, Justin C. Kasper, Marc Pulupa |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250048945
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| Zusammenfassung |
| We present the first observations at supercritical interplanetary shocks of large amplitude (>
100 mV/m pk-pk) solitary waves, ~30 mV/m pk-pk waves exhibiting characteristics
consistent with electron Bernstein waves, and > 20 nT pk-pk electromagnetic lower
hybrid-like waves, with simultaneous evidence for wave heating and particle energization.
The solitary waves and the Bernstein-like waves were likely due to instabilities driven by the
free energy provided by reflected ions [Wilson III et al., 2010]. They were associated with
strong particle heating in both the electrons and ions. We also show a case example of parallel
electron energization and perpendicular ion heating due to a electromagnetic lower
hybrid-like wave. Both studies provide the first experimental evidence of wave heating and/or
particle energization at interplanetary shocks. Our experimental results, together with the
results of recent Vlasov [Petkaki and Freeman, 2008] and PIC [Matsukiyo and Scholer, 2006]
simulations using realistic mass ratios provide new evidence to suggest that the
importance of wave-particle dissipation at shocks may be greater than previously thought. |
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