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Galactic cosmic rays in the distant heliosphere

McDonald, Frank B. and Webber, W. R. and Stone, E. C. and Cummings, A. C. and Heikkila, B. C. and Lal, N. (2013) Galactic cosmic rays in the distant heliosphere. In: Centenary Symposium 2012: Discovery of Cosmic Rays. AIP Conference Proceedings. No.1516. American Institute of Physics , Melville, NY, pp. 85-88. ISBN 978-0-7354-1137-1.

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The small flotilla of spacecraft: Pioneers 10 and 11 and Voyagers 1 and 2 (V1 and V2) that have traveled from 1 AU to the distant heliosphere continue the quest of Victor Hess to understand the nature of this radiation that comes to us from beyond the confines of our solar system. At this time V1 and V2 are traveling deeper into the heliosheath and approaching its outer boundary - the heliopause. In the heliosheath the intensity of 2.5 - 60 MeV GCR electrons has risen significantly above detector background levels and provides an important new diagnostic tool for exploring cosmic ray transport in this previously unexplored region of space. Over the past seven months the intensity of GCR ions and electrons at V1 have remained constant after a steady, 5.5 year exponential increase whose rate varied with particle species. Is this an indication that V1 is approaching the heliopause?

Item Type:Book Section
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Stone, E. C.0000-0002-2010-5462
Cummings, A. C.0000-0002-3840-7696
Additional Information:© 2013 American Institute of Physics. Published online 07 February 2013. Prof. Frank McDonald died not long after the meeting and was unable to write this paper himself. The Editor wrote this paper by transcribing it from the presentation made at the meeting. Any errors should be ascribed to the Editor and not to the authors of the paper.
Group:Space Radiation Laboratory
Subject Keywords:galactic cosmic rays, anomalous cosmic rays, solar modulation, heliosphere, heliopause, heliosheath
Series Name:AIP Conference Proceedings
Issue or Number:1516
Classification Code:PACS: 96.50.Fm, 96.50.Vg, 96.50.S-, 96.50.Ek,, 96.50.Xy, 96.50.Wx
Record Number:CaltechAUTHORS:20160420-130923910
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Official Citation:Galactic cosmic rays in the distant heliosphere McDonald, Frank B. and Webber, W. R. and Stone, E. C. and Cummings, A. C. and Heikkila, B. C. and Lal, N., AIP Conference Proceedings, 1516, 85-88 (2013), DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:66317
Deposited By: Tony Diaz
Deposited On:20 Apr 2016 21:52
Last Modified:10 Nov 2021 23:56

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