Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh23b1857b&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH23B-1857
Physics
[2102] Interplanetary Physics / Corotating Streams, [2134] Interplanetary Physics / Interplanetary Magnetic Fields, [2162] Interplanetary Physics / Solar Cycle Variations, [2194] Interplanetary Physics / Instruments And Techniques
Scientific paper
We have studied CIRs at 1 AU over two solar cycles, by identifying 153 CIRs from the start of 1995 to the end of 2008 using ACE and Wind bulk plasma and magnetic field data. We used this list to study the bulk properties and the three dimensional structure of CIRs using minimum variance analysis. CIR characteristics have been studied by looking at the distribution of various bulk plasma and magnetic field properties. We also looked into the relationships between some of these properties and found that the strongest correlations occur between the magnetic, thermal and dynamic pressures. The planar magnetic structure of CIRs form along the Parker spiral and with an approximate, mean tilt out of the ecliptic of 20°. They also have a mean minimum width of 0.12 AU. CIRs with the strongest compression occur at solar maximum. At the ecliptic, CIRs do not always form with tilt out of the ecliptic opposing the hemisphere that their coronal hole originated in. We have also compared Lee’s prediction of solar wind deflection to observations and found a relationship does exist, but not as expected by theory.
Broiles T. W.
Desai Mihir I.
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