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The Dynamic Heliosphere: Outstanding Issues |
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| Authors: | V Florinski A Balogh J R Jokipii D J McComas M Opher N V Pogorelov J D Richardson E C Stone B E Wood |
| Institution: | 1. Department of Physics and Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, 301 Sparkman Dr., Huntsville, AL, 35806, USA 2. International Space Science Institute, Hallerstrasse 6, Bern, 3012, Switzerland 3. Department of Planetary Sciences and Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ, 85721, USA 4. Southwest Research Institute, 6220 Culebra Rd., San Antonio, TX, 78238, USA 5. Department of Physics and Astronomy, George Mason University, 4400 University Drive, Fairfax, VA, 22030, USA 6. Department of Physics and Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, 301 Sparkman Dr., Huntsville, AL, 35806, USA 7. Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA 8. Space Radiation Laboratory, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA, 91125, USA 9. Space Science Division, Naval Research Laboratory, 4555 Overlook Ave. S.W., Washington, DC, 20375, USA |
| Abstract: | Properties of the heliospheric interface, a complex product of an interaction between charged and neutral particles and magnetic fields in the heliosphere and surrounding Circumheliospheric Medium, are far from being fully understood. Recent Voyager spacecraft encounters with the termination shock and their observations in the heliosheath revealed multiple energetic particle populations and noticeable spatial asymmetries not accounted for by the classic theories. Some of the challenges still facing space physicists include the origin of anomalous cosmic rays, particle acceleration downstream of the termination shock, the role of interstellar magnetic fields in producing the global asymmetry of the interface, the influence of charge exchange and interstellar neutral atoms on heliospheric plasma flows, and the signatures of solar magnetic cycle in the heliosheath. These and other outstanding issues are reviewed in this joint report of working groups 4 and 6. |
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