Comparison of coronal rotation and interplanetary recurrence during 1964--1976

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA092iA07p07235· OSTI ID:6408836

Parker, G D

Contemporaneous coronal and interplanetary data sets which span the first full solar cycle of in situ space observations illuminate the solar origins of corotation and recurrence in the solar wind. Because solar rotation is differential, comparisons of solar rotation and interplanetary recurrence periods suggest latitudes of origin for recurrent space phenomena. The 27-day recurrence period of geomagnetic activity and solar wind streams is associated with lower latitudes in the 1.5 R/sub S/ corona than in the 1.1 R/sub S/ corona. If we associate the recurrence period with coronal tracers at the lower height, we determine an observational upper limit of 20 on typical solar wind motions in latitude over 1 AU. However, if we suppose that magnetic field lines which close just beneath the source surface at the equator are anchored typically 20 away from the equator, stream recurrence periods approximate high-altitude equatorial rotation periods, in which case, no meridional motion of solar wind over 1 AU is implied. Plausible coronal sources of IMF corotation periods can be found for most intervals, but we discuss one interval in which solar magnetic tracers may not reflect field line rotation at the base of the solar wind. copyright American Geophysical Union 1987

• Research Organization: Department of Physics, Norwich University, Northfield, Vermont
• OSTI ID: 6408836
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 92:A7; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
INTERPLANETARY MAGNETIC FIELDS
INTERPLANETARY SPACE
MAGNETIC FIELDS
MAIN SEQUENCE STARS
MOTION
ROTATION
SOLAR ACTIVITY
SOLAR CORONA
SOLAR CYCLE
SOLAR WIND
SPACE
STARS
STELLAR ATMOSPHERES
STELLAR CORONAE
SUN