interesting, thanks for sharingTeslascience said:Is the sun's magnetic field generated by a double dynamo?
https://www.ras.org.uk/news-and-press/2680-irregular-heartbeat-of-the-sun-driven-by-double-dynamo
Sorry if it was discussed yet but I couldn't find it.
The double dynamo in the sun is a theory proposed by scientists to explain the complex magnetic field observed on the surface of the sun. It suggests that there are two separate dynamos, or mechanisms, that generate the sun's magnetic field: a deep-seated dynamo in the interior of the sun and a shallow dynamo near the surface.
The double dynamo theory explains why the sun's magnetic field is constantly changing and why it has a complex structure. The interaction between the two dynamos results in the formation of sunspots, solar flares, and other solar activity. It also plays a crucial role in the solar cycle, which lasts about 11 years.
Scientists have gathered evidence from observations of the sun's magnetic field, as well as from simulations and models. For example, the presence of small-scale magnetic fields near the surface of the sun supports the idea of a shallow dynamo, while the variations in the sun's magnetic field over time support the existence of a deep-seated dynamo.
While the double dynamo theory is widely accepted, there are still some challenges and questions that scientists are working to answer. For example, it is not fully understood how the two dynamos interact and whether there are other factors that influence the sun's magnetic field. Additionally, the precise mechanisms behind the dynamos are still being studied.
The double dynamo theory has greatly advanced our understanding of the sun and its complex magnetic field. It has helped us explain and predict solar activity, which can have significant impacts on Earth's climate and technology. It also has implications for our understanding of other stars and their magnetic fields.