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Quasiperiodic Emissions and Related Particle Precipitation Bursts Observed by the DEMETER Spacecraft

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F21%3A00547878" target="_blank" >RIV/68378289:_____/21:00547878 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216208:11320/21:10439887

  • Result on the web

    <a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JA029621" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JA029621</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1029/2021JA029621" target="_blank" >10.1029/2021JA029621</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Quasiperiodic Emissions and Related Particle Precipitation Bursts Observed by the DEMETER Spacecraft

  • Original language description

    Electromagnetic waves observed in the inner magnetosphere at frequencies between about 0.5 and 4 kHz sometimes exhibit a quasiperiodic (QP) time modulation of the wave intensity with modulation periods from tens of seconds up to a few minutes. Such waves are typically termed ´QP emissions´ and their origin is still not fully understood. We use a large set of more than 2,000 of these events identified in the low-altitude DEMETER spacecraft data to check for energetic electron flux variations matching the individual QP wave elements. Altogether, seven such events are identified and their detailed analysis is performed. Energetic electron fluxes are found to be modulated primarily at energies lower than about 250 keV. While the waves may propagate unducted across L-shells, the energetic particles follow magnetic field lines from the interaction region down to the observation point. This is used to estimate the locations of anticipated generation regions to L-shells between about 4 and 6, and the respective source radial dimensions to about 0.6-1.2 Earth radii. The frequencies of the events are confined below half of the equatorial electron gyrofrequency in the determined source regions. Finally, it is shown that individual QP elements exhibit a fine inner structure corresponding to the wave bouncing between the hemispheres.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10305 - Fluids and plasma physics (including surface physics)

Result continuities

  • Project

    <a href="/en/project/GA21-01813S" target="_blank" >GA21-01813S: Anthropogenic electromagnetic emissions and their effects on the Earth’s inner magnetosphere</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Geophysical Research-Space Physics

  • ISSN

    2169-9380

  • e-ISSN

    2169-9402

  • Volume of the periodical

    126

  • Issue of the periodical within the volume

    10

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    12

  • Pages from-to

    e2021JA029621

  • UT code for WoS article

    000711498900005

  • EID of the result in the Scopus database

    2-s2.0-85118169841