Abstract
The characteristics of relativistic solar protons have been obtained using the methods of optimization based on the data of ground detectors of cosmic rays during the event of December 13, 2006, which occurred under the conditions of solar activity minimum. The dynamics of relativistic solar protons during the event has been studied. It has been indicated that two populations (components) of particles exist: prompt and delayed (slow). The prompt component with a hard energy spectrum and strong anisotropy manifested itself as a pulse-shaped enhancement at Apatity and Oulu stations, which received particles with small pitch-angles. The delayed component had a wider pitch-angle distribution, as a result of which an enhancement was moderate at Barentsburg station and at most neutron monitors of the worldwide network. The energy spectra obtained from the ground-based observations are in good agreement with the direct measurements of solar protons on balloons and spacecraft.
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References
G. A. Bazilevskaya and A. K. Svirzhevskaya, “On the Stratospheric Measurements of Cosmic Rays,” Space Sci. Rev. 85, 431–521 (1998).
G. A. Bazilevskaya and R. M. Golynskaya, “On the SCR Propagation in the Interplanetary Medium with Regard to Adiabatic Focusing,” Geomagn. Aeron. 29(2), 204–209 (1989).
E. W. Cliver, S. W. Kahler, M. A. Shea, and D. F. Smart, “Injection Onsets of ∼2 GeV Protons and ∼1 MeV Electrons and ∼100 keV Electrons in Solar Cosmic Ray Flares,” Astrophys. J. 260, 362–370 (1982).
L. J. Cramp, M. L. Duldig, E. O. Flueckiger, et al., “The October 22, 1989, Solar Cosmic Ray Enhancement: An Analysis of the Anisotropy and Spectral Characteristics,” J. Geophys. Res. 102A, 24237–24248 (1997).
H. Debrunner, E. Flueckiger, and J. A. Lockwood, “Response of Neutron Monitors to Solar Cosmic Ray Events,” in Proceedings of the 8th European Cosmic Ray Symposium, Rome, 1984.
P. K. Manoharan and M. R. Kundu, “Coronal Structure of a Flaring Region and Associated Coronal Mass Ejection,” Astrophys. J. 592, 597–606 (2003).
L. I. Miroshnichenko, K. L. Klein, G. Trottet, et al., “Relativistic Nucleon and Electron Production in the October 28, 2003 Solar Event,” J. Geophys. Res. 110, A09S08 (2005).
I. N. Toptygin, Cosmic Rays in Interplanetary Magnetic Fields (Nauka, Moscow, 1983; Reidel, Dordrecht, 1985).
N. A. Tsyganenko, “A Model of the Near Magnetosphere with a Down-Dusk Asymmetry: 1. Mathematical Structure,” J. Geophys. Res. 107A, 1176 (2002).
E. V. Vashenyuk and L. I. Miroshnichenko, “Generation and Propagation Characteristics of Relativistic SCR for the September 29, 1989 Event,” Geomagn. Aeron. 38(2), 129–134 (1998) [Geomagn. Aeron. 38, 233–237 (1998)].
E. V. Vashenyuk, Yu. V. Balabin, J. Perez-Peraza, et al., “Some Features of the Sources of Relativistic Particles at the Sun in the Solar Cycles 21–23,” Adv. Space Res. 38(3), 411–417 (2006).
E. V. Vashenyuk, Yu. V. Balabin, and B. B. Gvozdevsky, “Relativistic Solar Proton Events of January 20, 2005: Model Studies,” Geomagn. Aeron. 46(4), 449–455 (2006) [Geomagn. Aeron. 46, 424–429 (2006)].
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Original Russian Text © E.V. Vashenyuk, Yu.V. Balabin, B.B. Gvozdevsky, L.I. Shchur, 2008, published in Geomagnetizm i Aeronomiya, 2008, Vol. 48, No. 2, pp. 157–161.
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Vashenyuk, E.V., Balabin, Y.V., Gvozdevsky, B.B. et al. Characteristics of relativistic solar cosmic rays during the event of December 13, 2006. Geomagn. Aeron. 48, 149–153 (2008). https://doi.org/10.1134/S0016793208020035
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DOI: https://doi.org/10.1134/S0016793208020035