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Reconstruction of precipitating electrons and three-dimensional structure of a pulsating auroral patch from monochromatic auroral images obtained from multiple observation points
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2022 (Engelska)Ingår i: Annales Geophysicae, E-ISSN 1432-0576, Vol. 40, nr 4, s. 475-484Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In recent years, aurora observation networks using high-sensitivity cameras have been developed in the polar regions. These networks allow dimmer auroras, such as pulsating auroras (PsAs), to be observed with a high signal-to-noise ratio. We reconstructed the horizontal distribution of precipitating electrons using computed tomography with monochromatic PsA images obtained from three observation points. The three-dimensional distribution of the volume emission rate (VER) of the PsA was also reconstructed. The characteristic energy of the reconstructed precipitating electron flux ranged from 6 to 23 keV, and the peak altitude of the reconstructed VER ranged from 90 to 104 km. We evaluated the results using a model aurora and compared the model's electron density with the observed one. The electron density was reconstructed correctly to some extent, even after a decrease in PsA intensity. These results suggest that the horizontal distribution of precipitating electrons associated with PsAs can be effectively reconstructed from ground-based optical observations.

Ort, förlag, år, upplaga, sidor
2022. Vol. 40, nr 4, s. 475-484
Nationell ämneskategori
Fusion, plasma och rymdfysik
Identifikatorer
URN: urn:nbn:se:polar:diva-9004DOI: 10.5194/angeo-40-475-2022OAI: oai:DiVA.org:polar-9004DiVA, id: diva2:1729077
Tillgänglig från: 2023-01-19 Skapad: 2023-01-19 Senast uppdaterad: 2023-01-19Bibliografiskt granskad

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