Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974jgr....79.4575w&link_type=abstract
Journal of Geophysical Research, vol. 79, Nov. 1, 1974, p. 4575-4580.
Astronomy and Astrophysics
Astronomy
4
Astronomical Models, Interplanetary Magnetic Fields, Meridional Flow, Solar Corona, Solar Wind, Spaceborne Photography, Apollo 15 Flight, Command Modules, Curvature, Radial Velocity, Solar Rotation
Scientific paper
The first observations of coronal streamers to an elongation angle of 12.5 deg were taken aboard the Apollo 15 command module in lunar orbit. Streamer curvature in both heliocentric latitude and heliocentric longitude may be determined from the positions of three curved streamers. This curvature is interpreted by assuming that it is not transient and that streamers trace flow from a stationary position on the solar surface. The azimuthal curvature is explained by corotation of streamer material with the sun out to approximately 25 solar radii, followed by a constant radial velocity of 275 km/sec and force free flow to 60 solar radii. The curvature toward the solar equator implies a meridional flow of 45 + or - 15 km/sec between 50 and 60 solar radii. If constant angular momentum is assumed beyond 60 solar radii, the resultant azimuthal and meridional velocities are consistent with the solar wind observed at 1 AU.
MacQueen Robert M.
Wilson Christine Diana
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