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| Paper: |
The Effect of Latitudinal Averaging of Surface Tracers on Patterns of Torsional Oscillations |
| Volume: |
478, Fifty Years of Seismology of the Sun and Stars |
| Page: |
297 |
| Authors: |
Tlatov, A. G.; Pevtsov, A. A. |
| Abstract: |
Latitudinal bands of faster/slower (relative to average) rate of
rotation of solar plasma (also known as the solar torsional oscillations)
are considered to be a fundamental property of the Sun, and are
believed to be important for the solar dynamo. Torsional oscillations
are derived from the measurements of the solar rotation at the
photosphere and (indirectly, via methods of helioseismology) in the
convection zone. Here, we raise a possibility that the pattern of the
torsional oscillations could be a spurious feature resulting
from a combination of the differential rotation, the latitudinal drift
of tracers, and a weighted contribution of tracers within an averaging
window used to determine the solar rotation rate. This spurious feature
may have an effect on both the observations taken in the solar photosphere
(e.g., Doppler velocity measurements and feature tracking techniques)
and the helioseismic measurements. |
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