Proton fluxes with energies from fractions to tens of megaelectronvolts in outer heliosphere and near its boundaries

I. S. Veselovsky, M. A. Zeldovich, K. Kecskeméty, Yu L. Logachev

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Abstract

The radial gradient of low-energy (∼0.6 to 2 MeV) protons in the heliosphere at 20 to 80 AU during minima of solar cycles 22 and 23 was estimated according to the Voyager-1, -2 spacecraft data. It was shown that the radial gradient sign changes from positive to negative at ∼70 to 80 AU. This means that prevalent particle fluxes are formed after the inversion point, whose source is far from the Sun, possibly near heliospheric boundaries. One of the possible mechanisms of acceleration and partial confinement of particles in the outer heliosphere in the region of the terminal shock is discussed.

Original languageEnglish
Pages (from-to)945-948
Number of pages4
JournalBulletin of the Russian Academy of Sciences: Physics
Volume69
Issue number6
Publication statusPublished - 2006

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heliosphere
gradients
protons
solar cycles
flux (rate)
point sources
spacecraft
sun
shock
inversions
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Proton fluxes with energies from fractions to tens of megaelectronvolts in outer heliosphere and near its boundaries. / Veselovsky, I. S.; Zeldovich, M. A.; Kecskeméty, K.; Logachev, Yu L.

In: Bulletin of the Russian Academy of Sciences: Physics, Vol. 69, No. 6, 2006, p. 945-948.

Research output: Contribution to journalArticle

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