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  • 1
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    Shock acceleration of nucleons at 16 deg and above solar latitude associated with interplanetary corotating interaction regions (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The analysis of magnetic field and nuclei measurements in the 1 to 10 MeV/nucleon range for protons and helium at about 16 deg N solar latitude near solar cycle minimum (1975-76) shows both: (1) that nucleons are accelerated locally in corotating shocks, and (2) that the associated recurring corotating interaction regions (CIRs) at about 16 deg latitude have approximately the same temporal and spatial parameters found for CIRs in the equatorial plane at radial distances less than 5 AU. The evidence indicates that both the CIR structures and nucleon acceleration by shocks extend to intermediate solar latitudes and are likely to be observed during the Ulysses Mission out of the ecliptic plane.
    Keywords: SOLAR PHYSICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    The recovery of the cosmic ray flux from maximum solar modulation at IMP-8 (1 AU) and at Pioneer (R 30 AU) (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: In the period 1980-84, observations of relativistic and low energy (30 E 70 MeV/n) cosmic ray nuclei from Pioneer 10 in the outer heliosphere and from IMP-8 at AU show that increases as well as decreases in intensity propagate outward at velocities equal to or greater than the average solar wind velocity.
    Keywords: SOLAR PHYSICS
    Type: SH-4.7-7 , 19th Intern. Cosmic Ray Conf - Vol. 5; p 206-209; NASA-CP-2376-VOL-5
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    NASA TECHNICAL REPORTS
  • 3
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    The 1973-1984 Solar Modulation of Cosmic Ray Nuclei (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: As a continuation of the program of solar modulation studies, new measurements were carried out with the cosmic ray telescope on the Earth satellite IMP-8, of the intensity time variations and the energy spectra of galactic cosmic ray protons, helium, carbon and oxygen from 1980 through 1984 including the recent solar maximum. In order to test the applicability of a steady state model of solar modulation during a period which includes times of rapidly changing modulation, these fluxes were equated with the predictions of a conventional model of solar modulation which assumes equilibrium between modulation mechanisms. It is found that for a reasonable range of variations of the diffusion coefficient the model predictions can be made to agree with the measurements at essentially all times during the studied period. The model can account also for the observed hysteresis effects between cosmic rays of different rigidities.
    Keywords: SOLAR PHYSICS
    Type: SH-4.1-16 , 19th Intern. Cosmic Ray Conf - Vol. 4; 4; 409-412; NASA-CP-2376-VOL-4
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    NASA TECHNICAL REPORTS
  • 4
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    Elemental abundance differences between nuclei acclerated in CIR shocks and solar flares (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Measurement of the ratios of nuclear abundances H/He, CNO/Fe-group and the Fe-group/HE for 51 passages of Corotating Interaction Regions (CIRs) at 1 AU, and measurement of these ratios from 620 solar flares in the energy range 0.6 to 4 MeV per nucleon, show that CIR shock acceleration alone does not change significantly these ratios from the values they have for solar system abundances or the solar wind. The solar flare ratios continue to reflect strong biases in the abundances, consistent with requirements for multistage acceleration rpocesses at the Sun.
    Keywords: SOLAR PHYSICS
    Type: SH-2.2-6 , 19th Intern. Cosmic Ray Conf - Vol. 4; p 277-280; NASA-CP-2376-VOL-4
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  • 5
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    Evolution of our knowledge of the heliosphere (1989)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: The historical development of ideas and investigations leading to the present understanding of the heliosphere is presented. A summary of the most recent research in plasmas, magnetic fields and accelerated charged particles in the outer heliosphere based on spacecraft investigations, is reviewed. Current plans for investigating the heliosphere in three dimensions are discussed.
    Keywords: SOLAR PHYSICS
    Type: Advances in Space Research (ISSN 0273-1177); 9; 4 19
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