Physics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..128..321h&link_type=abstract
(IAU, The Inside the Sun Colloquium, 121st, Versailles, France, May 22-26, 1989) Solar Physics (ISSN 0038-0938), vol. 128, July
Physics
14
Convective Flow, Flow Distribution, Helioseismology, Solar Activity, Solar Atmosphere, Dynamo Theory, P Waves, Power Spectra, Solar Oscillations, Solar Rotation
Scientific paper
The first map of the horizontal flows as a function of depth and heliocentric position in the solar convection zone is presented. The map is inferred from a least-squares smoothness-constrained inversion of velocities measured from ring diagrams of the solar p-mode oscillations. The data provide information in four longitude regions at a latitude just south of the solar equator. The presence of several features is suggested by the results: (1) a prograde directed longitudinal jet between the hydrogen and first helium ionization zone, reversing direction to retrograde below the second helium ionization zone; (2) an equatorward directed latitudinal flow above the second helium ionization zone; and (3) a poleward latitudinal flow below the second helium ionization zone, but only in one of the four longitude bands. The magnitude of the flows is substantial, reaching some 450 m/s for the longitudinal jet, and 150 m/s for the latitudinal flow. Possible systematic errors and the physical consequences of the flows are discussed.
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