Evidence for large-scale velocity features on the sun

Details Evidence for large-scale velocity features on the sun Evidence for large-scale velocity features on the sun

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228l..45h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 228, Feb. 15, 1979, p. L45-L50.

Mathematics

Logic

54

Solar Activity, Solar Atmosphere, Solar Rotation, Solar Velocity, Velocity Distribution, Earth Motion, Equatorial Orbits, Gas Flow, Meridional Flow, Meteorological Charts, Solar Granulation, Synoptic Measurement, Velocity Measurement

Scientific paper

Giant velocity features on the solar surface are seen in line-of-sight velocity data from the Mount Wilson magnetograph. Velocity amplitudes around 40 m/s are seen in features with dimensions about 15 deg in latitude and 30-60 deg in longitude. These features are associated with solar activity. The largest such feature accompanied the largest complex of activity in this interval, lived for about 16 rotations, and predated the first magnetic fields in the area by about two rotations. A general pattern of upward motion at the equator is seen, and motions away from the earth at higher latitudes could represent a meridional flow toward the poles of the order of 20 m/s.

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