Bibliographic Details
| Title: |
Estimation of the solar modulation limit of cosmic rays. |
| Authors: |
Caballero-Lopez, R.A.1 (AUTHOR) rogelioc@geofisica.unam.mx |
| Source: |
Advances in Space Research. May2026, Vol. 77 Issue 10, p10906-10912. 7p. |
| Subjects: |
Cosmic rays, Solar activity, Solar energetic particles, Galactic cosmic rays, Frequency spectra, Neutron counters, Sun, Parameterization |
| Abstract: |
During the last six solar activity cycles, the intensity of cosmic radiation has exhibited variations of different magnitudes. Since 1960, the global neutron monitor network has identified a maximum in global modulation in June 1991 and a global minimum in December 2009. This study analyzes the reduction of the cosmic-ray spectrum at the top of the atmosphere as a function of time and energy. A simple method is proposed for calculating the modulation factor. The results show that, during the interval considered, the Sun has been able to reduce the intensity spectrum by 10 % of its interstellar value at approximately 50 GeV and by about 5 % at approximately 100 GeV. Reductions at higher energies cannot be detected with current observational accuracy unless solar activity becomes significantly stronger than that observed in June 1991. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
