Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jgra..11703102b&link_type=abstract
Journal of Geophysical Research, Volume 117, Issue A3, CiteID A03102
Astronomy and Astrophysics
Astrophysics
Interplanetary Physics: Corotating Streams, Interplanetary Physics: Interplanetary Magnetic Fields, Interplanetary Physics: Solar Cycle Variations (7536), Interplanetary Physics: Solar Wind Plasma, Solar Physics, Astrophysics, And Astronomy: Coronal Holes
Scientific paper
We have surveyed the properties of 153 co-rotating interaction regions (CIRs) observed at 1 AU from January, 1995 through December, 2008. We identified that 74 of the 153 CIRs contain planar magnetic structures (PMSs). For planar and non-planar CIRs, we compared distributions of the bulk plasma and magnetic field parameters. Our identification of CIRs and their features yields the following results: (1) The different pressures within CIRs are strongly correlated. (2) There is no statistical difference between planar and non-planar CIRs in the distributions and correlations between bulk plasma and magnetic field parameters. (3) The mean observed CIR azimuthal tilt is within 1 σ of the predicted Parker spiral at 1 AU, while the mean meridional tilt is about 20°. (4) The meridional tilt of CIRs changes from one solar rotation to the next, with no relationship between successive reoccurrences. (5) The meridional tilt of CIRs in the ecliptic is not ordered by the magnetic field polarity of the parent coronal hole. (6) Although solar wind deflection is a function of CIR shape and speed, the relationship is not in agreement with that predicted by Lee (2000). We conclude the following: (1) PMSs in CIRs are not caused by a unique characteristic in the local plasma or magnetic field. (2) The lack of relationship between CIR tilt and its parent coronal hole suggests that coronal hole boundaries may be more complex than currently observed. (3) In general, further theoretical work is necessary to explain the observations of CIR tilt.
Broiles T. W.
Desai Mihir I.
McComas David John
No associations
LandOfFree
Formation, shape, and evolution of magnetic structures in CIRs at 1 AU does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Formation, shape, and evolution of magnetic structures in CIRs at 1 AU, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation, shape, and evolution of magnetic structures in CIRs at 1 AU will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1561202