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Corotating Interaction Regions in the Outer Heliosphere |
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| Authors: | PR Gazis FB McDonald RA Burger S Chalov RB Decker J Dwyer DS Intriligator JR Jokipii AJ Lazarus GM Mason VJ Pizzo MS Potgieter IG Richardson LJ Lanzerotti |
| Institution: | (1) NASA Ames Research Center, SISU Foundation, Moffett Field, California, USA;(2) Dept. of Physics and IPST, University of Maryland, College Park, Maryland, USA;(3) Potchefstroom University for CHE, Potchefstroom, South Africa;(4) Institute for Problems in Mechanics, Russian Academy of Science, Moscow, Russia;(5) Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA;(6) Carmel Research Center, Santa Monica, California, USA;(7) Depts. of Planetary Sciences and Astronomy, University of Arizona, Tucson, Arizona, USA;(8) Center for Space Research, Massachusetts Institute of Technology, Cambridge, Mass., USA;(9) NOAA/SEC, Boulder, Colorado, USA;(10) NASA/Goddard Space Flight Center, Greenbelt, Maryland, USA;(11) AT&;;;T Bell Laboratories, Murray Hill, New Jersey, USA |
| Abstract: | We discuss the structure and evolution of CIRs and their successors in the outer heliosphere. These structures undergo significant evolution as they are convected to greater heliocentric distances. A progression of different types of structure are observed at increasing distance from the Sun. Similar structures are observed at similar heliocentric distance at different portions of the solar cycle. CIRs and their successors are associated with many important physical processes in the outer heliosphere. We discuss the relationship between these structures and recurrent phenomena such as cosmic ray variations, and review some of the associated theoretical models on the role of corotating structures and global merged interaction regions (GMIRs) in global cosmic ray modulation. We also discuss some outstanding questions related to the origin of non-dispersive quasi-periodic particle enhancements associated with CIRs and their successors in the outer heliosphere. This revised version was published online in August 2006 with corrections to the Cover Date. |
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