Sarbani Basu (Yale)

The Sun in Time
When Nov 26, 2020 from 02:30 PM to 03:30 PM
What
  • Colloquium
Where Cyberspace
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The theory of stellar structure and evolution is quite successful in predicting the evolution of stars like the Sun over their lifetime of billions of years. However, solar changes in the Sun that take place over decades have more societal relevance. these changes are governed by the solar activity cycle and not described by stellar evolution theory. While changes on the surface of the Sun have been studied for a very long time, internal changes were a mystery until helioseismic data over different epochs of the solar cycle became available. We now have helioseismic data over two solar cycles that have shown us some of the interesting changes in the solar interior. In this talk I shall introduce helioseismic analysis techniques and describe what we have learned about the structure and dynamics of the Sun how they vary with time. I shall also touch upon some issues and controversies that affect the broader stellar astrophysics community.