Previously, scientists found that the Sun has oscillations with a short period, about five minutes. They are used
More than 40 years ago, long oscillations with a period of 27 days were predicted.
After the space was launchedNASA's Solar Dynamics Observatory (SDO), scientists analyzed the images and found long-period fluctuations in the Sun, comparable to the 27-day period of the Sun's rotation. Oscillations appear on the surface of the Sun in the form of vortices moving at a speed of about five kilometers per hour.
Long-term oscillations depend on rotationSuns, they are not acoustic in nature. To detect long-period solar oscillations, measurements of horizontal movements on the solar surface over many years are necessary. Continuous helioseismic and magnetic observations on board SDO are ideal for this purpose.
Laurent Gizon is a fellow at the Max Planck Institute for Solar System Research and the University of Göttingen in Germany.
Researchers have recorded dozens of oscillation modes, each with its own period and spatial dependence:
- feathers have maximum speed at the poles,
- the second - in middle latitudes,
- others are at the equator.
The discovery of this type of oscillation will help scientists learn more about the internal structure of the Sun.
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