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The 3-D Distribution of Artificial Aurora Induced by HF Radio Waves in the Ionosphere
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2019 (English)In: Journal of Geophysical Research - Space Physics, ISSN 2169-9380, E-ISSN 2169-9402, Vol. 124, no 4, p. 2992-3006Article in journal (Refereed) Published
Abstract [en]

We present 3-D excitation rate estimates of artificial aurora in the ionospheric F layer, induced by high-frequency radio waves from the European Incoherent Scatter heating facility. Simultaneous imaging of the artificial aurora was done with four separate Auroral Large Imaging System stations, permitting tomography-like 3-D auroral reconstruction of the enhanced atomic oxygen emissions at 6,300, 5,577, and 8,446 Å. Inspection of the 3-D reconstructions suggests that the distribution of energized electrons is less extended in altitude than predicted by transport calculations of electrons accelerated to 2?100 eV. A possible reason for this discrepancy is that high-frequency pumping might induce an anisotropic distribution of energized electrons.

Place, publisher, year, edition, pages
John Wiley & Sons, Ltd , 2019. Vol. 124, no 4, p. 2992-3006
Keywords [en]
heating, aurora, ionosphere, tomography, reconstruction, EISCAT
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:polar:diva-8370DOI: 10.1029/2018JA025988OAI: oai:DiVA.org:polar-8370DiVA, id: diva2:1395883
Available from: 2020-02-24 Created: 2020-02-24 Last updated: 2020-02-24Bibliographically approved

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Publisher's full texthttps://doi.org/10.1029/2018JA025988
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Journal of Geophysical Research - Space Physics
Astronomy, Astrophysics and Cosmology

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