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New Insights into Stellar Interiors from Asteroseismology

Colloquium: Astronomy Colloquia | September 12 | 4:10 p.m. | 2 LeConte Hall

Lars Bildsten, UCSB

Department of Astronomy

The advent of long-term and sensitive space-based photometry (e.g. Kepler and CoRoT) is probing stellar interiors; especially for post-main sequence red giants. Masses, radii and distances are now inferred for more than 10,000 stars across the Milky Way, often with accuracies better than ten percent. More profoundly, these observations are revealing the interior state of the star, clearly differentiating those that are undergoing helium burning in their cores to those that only are burning hydrogen in a shell. Moreover, interior rotation rates for thousands of post-main sequence stars will soon be known, probing the uncertain physics of interior angular momentum transport that is important to the progenitors of core collapse supernova., 510-642-5275