Speaker
Claudio Corti
(University of Hawai'i at Manoa (US))
Description
Galactic cosmic rays (GCRs) entering the heliosphere are disturbed by the magnetic field of the
Sun, which varies with a period of 11 years. The solar modulation affects the GCR fluxes up to
few tens of GeV, modifying the shape and the intensity of the local interstellar spectrum (LIS). The
time variation of the galactic cosmic protons at Earth can be studied indirectly on ground with the
neutron monitors (NMs) and directly from space with AMS-02 (2011-now), PAMELA (2006-
2010) and BESS (1993-2007). A new parametrization of the LIS will be presented, based on the latest data from AMS-
02 and Voyager 1. Using the framework of the force-field approximation, the solar modulation
parameter will be extracted from the time-dependent proton fluxes measured by PAMELA and BESS. The
results will be compared with the modulation parameter inferred by NMs.
Author
Claudio Corti
(University of Hawai'i at Manoa (US))
Co-authors
Cristina Consolandi
(University of Hawai'i at Manoa (US))
Julia Hoffman
(University of Hawai'i at Manoa (US))
Kathryn Whitman
(University of Hawai'i at Manoa (US))
Veronica Bindi
(University of Hawai'i at Manoa (US))
