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The characteristics of Forbush decreases based on data from AMS-02 experiment and fluxes of solar cosmic rays on GOES-15 one
- Authors: Dorosheva D.N.1,2, Arkhangelskaja I.V.2, Borog V.V.2
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Affiliations:
- Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences
- National Research Nuclear University MEPhI
- Issue: Vol 89, No 6 (2025)
- Pages: 984-988
- Section: Physics of Cosmic Rays
- URL: https://transsyst.ru/0367-6765/article/view/692836
- DOI: https://doi.org/10.31857/S0367676525060299
- ID: 692836
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Abstract
An analysis of the dependence of the amplitudes of the 10 strongest preceded by Halo-type CMEs Forbush decreases in proton and helium nuclei fluxes according to AMS-02 data on the magnetic rigidity of particles showed that it is well approximated by a power function (as was shown in the PAMELA experiment) in the rigidity range from 1 to 10–12 GV. The index of this function is in the range from –0.38±0.02 to –0.68 ± 0.04 for protons and from –0.41± 0.03 to –0.79 ± 0.04 for helium nuclei. But in a wider range of rigidity values up to 20 GV, such approximation significance level is only 90–92% for protons and 90–96% for helium nuclei. Exponential functions providing 95–99% significance level both for protons and helium nuclei should be used over the entire range of rigidities. Comparison of time series for protons according to AMS-02 and GOES-15 data shows the possibility of observing SEP and SPE together with the background Forbush decreases.
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About the authors
D. N. Dorosheva
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences; National Research Nuclear University MEPhI
Email: dorosheva2000@list.ru
Moscow, Russia
I. V. Arkhangelskaja
National Research Nuclear University MEPhIMoscow, Russia
V. V. Borog
National Research Nuclear University MEPhIMoscow, Russia
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