Solar Wind Velocity Near the Sun: Results from Interplanetary Scintillation Observations in 1989-1992

Details Solar Wind Velocity Near the Sun: Results from Interplanetary Scintillation Observations in 1989-1992 Solar Wind Velocity Near the Sun: Results from Interplanetary Scintillation Observations in 1989-1992

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994kofu.symp..401t&link_type=abstract

In: Proceedings of Kofu Symposium, Kofu, Japan, Sept. 6-10, 1993, p.401-404.

Physics

1

Scientific paper

The solar wind velocity near the sun has been derived from the interplanetary scintillation (IPS) observations at 2 and 8GHz, which have been carried out in 1989-1992 using two quasars; 3C279 and 3C273B. Results show clearly that the solar wind accelerates between 10 and 80Rs (solar radii), although the radial variation of velocities obtained from 3C273B observations is distorted significantly by the effect due to the coronal hole. It is also found that the high speed wind become dominant near the sun in recent years, and this fact is attributed to the development of the polar coronal hole in the descending phase of the solar cycle.

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