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Voyager 2 Observations of the Anisotropy of Anomalous Cosmic Rays in the Heliosheath

Cummings, A. C. and Stone, E. C. and Heikkila, B. C. and Lai, N. and Richardson, J. D. (2019) Voyager 2 Observations of the Anisotropy of Anomalous Cosmic Rays in the Heliosheath. In: 36th International Cosmic Ray Conference (ICRC2019). Proceedings of Science. No.358. SISSA , Trieste, Italy, Art. No. 1071.

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We have analyzed data collected from the Cosmic Ray Subsystem (CRS) instrument (Stone et al., 1977) on the Voyager 2 (V2) spacecraft during calibration manuevers for the magnetic field instrument while the spacecraft was located in the inner heliosheath of the heliosphere. We find that there is a diffusive anisotropy in the intensity of ∼0.5-35 MeV particles (mostly protons) that indicates that there exists a diffusive flow of these particles from the flank or tail of the heliosphere towards the nose and is slightly equatorward as well. This work supports the conclusion of an earlier, similar, but more restricted study (Stone et al., 2017) that the acceleration site of anomalous cosmic rays is back along the flank or tail of the solar wind termination shock.

Item Type:Book Section
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URLURL TypeDescription
Cummings, A. C.0000-0002-3840-7696
Stone, E. C.0000-0002-2010-5462
Richardson, J. D.0000-0003-4041-7540
Additional Information:© 2019 owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Pre-published on: 2019 July 22. Voyager data analysis is supported by NASA Grant NNN12AA01C.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Series Name:Proceedings of Science
Issue or Number:358
Record Number:CaltechAUTHORS:20190821-080755739
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98060
Deposited By: Tony Diaz
Deposited On:21 Aug 2019 16:28
Last Modified:09 Mar 2020 13:19

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