Solar velocity fields: 5-min oscillations and supergranulation |
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| Authors: | Andrew S Tanenbaum John M Wilcox Edward N Franzier Robert Howard |
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| Institution: | (1) Space Sciences Laboratory, University of California, Berkeley, Calif., U.S.A.;(2) Present address: Space Physics Laboratory, Aerospace Corporation, P.O. Box 95085, 90045 Los Angeles, Calif., U.S.A.;(3) Mount Wilson and Palomar Observatories, Carnegie Institution of Washington, California Institute of Technology, Pasadena, Calif., U.S.A. |
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| Abstract: | One dimensional magnetograph scans have been used to study the 5-min photospheric velocity oscillations and the supergranulation.
The oscillations in wing brightness lead the oscillations in velocity by less than 90° in the photosphere, and about 90° in
the chromosphere, suggesting that they are traveling waves at lower levels and standing waves at higher levels. Downward flows
have been observed to be coincident with the chromospheric network confirming the hypothesis that material is flowing downward
at supergranular boundaries. |
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