Pitch Angle Distributions of 0.6-1.8 MeV Protons Observed by Voyager 1 at 85-87 AU

Details Pitch Angle Distributions of 0.6-1.8 MeV Protons Observed by Voyager 1 at 85-87 AU Pitch Angle Distributions of 0.6-1.8 MeV Protons Observed by Voyager 1 at 85-87 AU

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..719..150d&link_type=abstract

PHYSICS OF THE OUTER HELIOSPHERE. AIP Conference Proceedings, Volume 719, pp. 150-155 (2004).

Physics

Particle Emission, Solar Wind, Interplanetary Magnetic Fields, Solar Wind Plasma, Sources Of Solar Wind, Spaceborne And Space Research Instruments, Apparatus, And Components

Scientific paper

We combined daily averages of magnetic field vector data and 0.6-1.8 MeV proton angular intensity data to construct 32 pitch angle distributions (PADs) for measurements made by Voyager 1 (V1) at 85-87 AU. The PADs were observed during the period 2002.6-2003.1, when energetic particle instruments on V1 measured unusually high intensities. The angular data show large, mainly unidirectional beaming of protons most often in the -T direction, i.e., away from the sun in the sense of a spiral magnetic field. The mean anisotropy amplitude based on the 32 samples is 0.55+/-0.21.

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