The 3D numerical modelling of the temporal modulation of galactic protons as per PAMELA and AMS02 observations with changing solar activity
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6 pages
Published in:
- PoS ICRC2023 (2023) 1318
Contribution to:
- , 1318
- ICRC2023
- Published: Jul 29, 2023
DOI:
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Abstract: (SISSA)
The interest in the study of the global features of the modulation of galactic cosmic rays hasincreased since the observation of the 2009 solar minimum when the Sun and consequently theheliosphere was very quiet. Since then, the changing of solar activity through the period ofmaximum activity has kept it a subject of interest. Encouraging this interest is the high precisionobservations by the PAMELA and AMS02 space missions. These exceptional measurementsprovide an opportunity for enhanced numerical modelling of the modulation of protons over a widerange of rigidity at the Earth. A well-established three-dimensional drift model is used to computeproton spectra from 2009 until 2019 that are compatible with the mentioned observations. Themain objective is to study how proton spectra quantitatively changes over time as solar activitychanges for one minimum to the next. Simulated spectra are shown together with the requiredmodulation parameters, and as such indicative of how the different modulation processes influencethe time evolution of cosmic ray protons over time.- p: spectrum
- cosmic radiation: galaxy
- p: cosmic radiation
- dimension: 3
- modulation
- solar
- AMS
- cosmic radiation: spectrum
- cosmic radiation: energy spectrum
- variability
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