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Solar Physics

, Volume 265, Issue 1–2, pp 187–195 | Cite as

Remote Sensing of Magnetic-Cloud Topology

  • Donald V. ReamesEmail author
Remote Sensing of the Inner Heliosphere

Abstract

We investigate the topology of magnetic clouds using energetic particles from a variety of sources outside the clouds as probes to remotely sense the interconnections of the magnetic field. We find that only a small percentage of field lines in magnetic clouds are truly closed directly to the Sun, so as to exclude particles from an external source. Field lines that are open to the outer heliosphere must be mixed with closed field lines on a fine spatial scale in the clouds to explain the simultaneous observation of anomalous cosmic rays from the outer heliosphere and of counter-streaming suprathermal electrons from the corona. The results of this paper show that, given sufficient time, particles accelerated at shock waves outside magnetic clouds have access to the interior and to a wide region of solar longitude in interplanetary space surrounding the clouds.

Keywords

Solar energetic particles Shock waves Magnetic clouds 

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Institute for Physical Science and TechnologyUniversity of MarylandCollege ParkUSA

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