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  • 11
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    Energetic particle observations at the Helios 1 spacecraft of shocks associated with coronal mass ejections (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Energetic particle data from the Helios 1 spacecraft have been used to study the particles associated with 26 coronal mass ejection (CME)/shock pairs. The particle events are divided into four classes on the basis of the relative intensities of their prompt and shock-associated components. Events in group 1 have strong prompt and shock components and are associated with energetic CMEs originating, most commonly, with central meridian flares. Group 2 events characteristically have strong prompt components and weaker shock components and are associated with western hemisphere (i.e., favorably located) flares. Group 3 consists of events with absent prompt components and strong shock components; the CMEs probably originate in disappearing filament events near central meridian. Group 4 events show no particle enhancements and are associated with slow CMEs and slow shocks.
    Keywords: SOLAR PHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 95; 6575-657
    Format: text
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    NASA TECHNICAL REPORTS
  • 12
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    MeV/n ions associated with corotating high-speed solar wind streams at less than 1 AU during 1978 to 1986 (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: Data from the Goddard Space Flight Center experiments on the ISEE 3/ICE, IMP 8, and Helios 1 spacecraft are used to investigate ion enhancements of more than 1 MeV/n associated with corotating high-speed solar wind streams at least 1 AU during 1978-1986. The observations are consistent with ion acceleration from the solar wind by corotating shocks in the outer heliosphere.
    Keywords: SOLAR PHYSICS
    Type: International Cosmic Ray Conference; Aug 11, 1991 - Aug 23, 1991; Dublin
    Format: text
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    NASA TECHNICAL REPORTS
  • 13
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    Sulfur abundances in the solar wind measured by SWICS on Ulysses (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: One of the nine experiments on Ulysses (launched October, 1990), the Solar Wind Ion Composition Spectrometer, utilizes an energy per charge deflection system along with time of flight technology to uniquely determine the mass and mass per charge of solar wind particles. Thus the composition of various solar wind types can be analyzed. Using the SWICS data accumulated during the in-ecliptic phase of the mission, we have determined the sulfur abundance, relative to silicon, in two different types of solar wind: transient and coronal hole associated flows. Sulfur is of extreme interest because it is one of the few elements that lies in the transitional region of the FIP-dependent relative abundance enrichment function, observed for solar energetic particles and some types of solar wind flows.
    Keywords: SOLAR PHYSICS
    Type: Advances in Space Research (ISSN 0273-1177); 13; 6; p. 79-82.
    Format: text
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    NASA TECHNICAL REPORTS
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