Determination of solar proton fluxes and energies at high solar latitudes by UV radiation measurements |
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| Affiliation: | 1. Centro de Investigación Tecnológica del Agua y en el Desierto, Ceitsaza, Universidad Católica del Norte, Avenida Angamos 0610, Antofagasta, Chile;2. Departamento de Ingeniería Química (Universidad Nacional del Sur) and Planta Piloto de Ingeniería Química (UNS-CONICET), Camino La Carrindanga Km. 7, 8000, Bahía Blanca, Argentina;1. Department of Biology and Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN 47405, USA;2. Department of Psychological Sciences, Kent State University, Kent, OH 44240, USA;3. Department of Neuroscience, Mount Sinai School of Medicine, New York, NY 10029, USA;4. Department of Pharmacology, Physiology & Neuroscience, University of South Carolina School of Medicine, Columbia, SC 29209, USA |
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| Abstract: | The latitudinal variation of the solar proton flux and energy causes a density increase at high solar latitudes of the neutral gas penetrating the heliosphere. Measurements of the neutral density by UV resonance radiation observations from interplanetary spacecraft thus permit deductions on the dependence of the solar proton flux on heliographic latitude. Using both the results of Mariner 10 measurements and of other off-ecliptic solar wind observations, the values of the solar proton fluxes and energies at polar heliographic latitudes are determined for several cases of interest. The Mariner 10 analysis, together with IPS results, indicate a significant decrease of the solar proton flux at polar latitudes. |
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