Physics
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977soph...51..459n&link_type=abstract
Solar Physics, vol. 51, Mar. 1977, p. 459-471.
Physics
11
Interplanetary Space, Plasma Dynamics, Solar Corona, Solar Wind Velocity, Interplanetary Magnetic Fields, Longitude, Magnetic Field Configurations, Magnetic Flux, Radial Velocity
Scientific paper
It is shown analytically that the transition from a high-speed stream source to the ambient coronal conditions is quite rapid in longitude in the high corona. This sharp eastern coronal boundary for the solar wind stream sources is strongly suggested by the solar wind 'dwells' which appear in plots of solar wind velocity against constant-radial-velocity-approximation source longitudes. The possibility of a systematic velocity-dependent effect in the constant-radial-velocity approximation, which would cause this boundary to appear sharper than it is, is investigated. A velocity-dependent interplanetary propagation effect or a velocity-dependent 'source altitude' are two possible sources of such a systematic effect. It is shown that, for at least some dwells, significant interplanetary effects are not likely. The variation of the Alfvenic critical radius in solar wind dwells is calculated, showing that the high-velocity stream originates from a significantly lower altitude than the ambient solar wind.
Gold Robert E.
Krieger Allen S.
Nolte J. T.
Roelof Edmond C.
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