An estimate of the local interstellar antiproton spectrum using solar modulation techniques on the data

Journal Article · Tue Sep 01 00:00:00 EDT 1992 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/171774· OSTI ID:6891217

Perko, J S ^[1]

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1. Bartol Research Inst., Newark, DE (United States)

Strong solar modulation of Galactic cosmic rays occurs in the energy range where balloon flights have measured Galactic antiproton-to-proton ratios. This modulation also varies substantially over the 15 yr period during which these ratios were gathered, due to the effect of the 11 yr solar cycle. This causes large fluctuations in cosmic-ray spectra measured inside the heliosphere. The study detailed in this paper uses both the numerical, one-dimensional model of solar modulation and its force-field approximation to calculate estimates of the antiproton intensity and p-bar/p ratio spectra in local interstellar space, independent of any interstellar production and propagation theory. These spectra include estimates of uncertainties in the modulation calculation. To offset solar-cycle effects, multiple sets of modulation parameters over this period were chosen from careful fits to electron and proton spectra contemporaneous with the p-bar/p ratio measurements. 43 refs.

• OSTI ID: 6891217
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 397:1; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIRSHIPS
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
ATMOSPHERES
BALLOONS
BARYONS
COSMIC RADIATION
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FLUCTUATIONS
HADRONS
HELIOSPHERE
INTERSTELLAR SPACE
IONIZING RADIATIONS
KINETIC ENERGY
MATTER
MODULATION
NUCLEI
NUCLEONS
ONE-DIMENSIONAL CALCULATIONS
PROTON SPECTRA
RADIATIONS
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR CYCLE
SOLAR WIND
SPACE
SPECTRA
VARIATIONS