Effects of Ducting on Whistler Mode Chorus or Exohiss in the Outer Radiation Belt
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F19%3A00511302" target="_blank" >RIV/68378289:_____/19:00511302 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/19:10396819
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019GL083115" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019GL083115</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2019GL083115" target="_blank" >10.1029/2019GL083115</a>
Alternative languages
Result language
angličtina
Original language name
Effects of Ducting on Whistler Mode Chorus or Exohiss in the Outer Radiation Belt
Original language description
Previously published statistics based on Cluster spacecraft measurements surprisingly show that in the outer radiation belt, lower band whistler mode waves predominantly propagate unattenuated parallel to the magnetic field lines up to midlatitudes, where ray tracing simulations indicated highly attenuated waves with oblique wave vectors. We explain this behavior by considering a large fraction of ducted waves. We argue that these ducts can be weak and thin enough to be difficult to detect by spacecraft instrumentation while being strong enough to guide whistler mode waves in a cold plasma ray tracing simulation. After adding a tenuous hot electron population, we obtain a strong effect of Landau damping on unducted waves, while the ducted waves experience less damping or even growth. Consequently, the weighted average of amplitudes and wave normal angles of a mixture of ducted and unducted waves provides us with strong quasi-parallel waves, consistent with the observations.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geophysical Research Letters
ISSN
0094-8276
e-ISSN
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Volume of the periodical
46
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
5735-5745
UT code for WoS article
000477616200012
EID of the result in the Scopus database
2-s2.0-85067668078