Spectrum of Jovian Electrons during the Solar Activity Minimum of 2007−2008

Autor: Yu. I. Logachev, E. I. Daibog
Rok vydání: 2021
Předmět:
Zdroj: Bulletin of the Russian Academy of Sciences: Physics. 85:1032-1035
ISSN: 1934-9432
1062-8738
DOI: 10.3103/s1062873821090082
Popis: A combination of two power laws is used to present spectra of electrons in the MeV range of energies, measured during the solar activity minimum in 2007−2008 by the Electron Proton Helium Instrument (EPHIN) on board the Solar and Heliospheric Observatory (SOHO). The power index for electrons with energies higher than 0.7 MeV is γ ≈ 1.5–1.6, testifying to their Jovian origin. For electrons with lower energies, γ ≥ 3.5. In combination with short-term bursts (lasting for 2–3 days) in the intensity of electrons and protons with energies on the order of hundreds of keV (according to data from the Electron Proton Alpha Monitor (EPAM) on board the Advanced Composition Explorer (ACE) and the Low-nergy Ion and electron (LION) instrument on board the SOHO, respectively), this value suggests that low-energy particles are accelerated in the interplanetary medium.
Databáze: OpenAIRE
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