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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Tanenbaum, A.S., Wilcox, J.M., Franzier, E.N. et al. Solar velocity fields: 5-min oscillations and supergranulation. Sol Phys 9, 328–342 (1969). https://doi.org/10.1007/BF02391655
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DOI: https://doi.org/10.1007/BF02391655