Temporal Variations in the Evershed Flow

Details Temporal Variations in the Evershed Flow Temporal Variations in the Evershed Flow

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh13a1141b&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH13A-1141

Astronomy and Astrophysics

Astrophysics

7500 Solar Physics, Astrophysics, And Astronomy, 7507 Chromosphere, 7524 Magnetic Fields, 7529 Photosphere, 7536 Solar Activity Cycle (2162)

Scientific paper

We present results of an analysis of the temporal Doppler variations of the Evershed flow. Doppler shifts were calculated from a unique, high-resolution data set of 39 spectral lines, spanning the photosphere and chromosphere. Our results indicate a quasi-periodic structure of the Evershed flow with a typical period between 18-24 minutes in the photosphere and 12-18 minutes in the chromosphere. We discuss the implications of these results for both the siphon flow and the moving flux tube models.

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