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Hearing the Stars: New Insights into Stellar Interiors form Asteroseisomology

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October 1, 2019
3:30PM - 5:00PM
1080 Physics Research Building, The Robert Smith Seminar Room

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Add to Calendar 2019-10-01 15:30:00 2019-10-01 17:00:00 Hearing the Stars: New Insights into Stellar Interiors form Asteroseisomology Speaker: Lars Bildsten (UC Santa Barbara) Long-term and sensitive space-based photometry from the CoRoT, Keplerand TESS satellites has allowed us to finally 'hear' the stars. These remarkable data have yielded accurate measurements of masses, radii and distances for more than 30,000 stars across the Milky Way that have been largely confirmed by the GAIAdata release. More profoundly, these observations are revealing the interior stellar conditions, clearly differentiating those stars that are undergoing helium burning in their cores to those that are only burning hydrogen in a shell. Moreover, interior rotation rates for hundreds of stars now test the uncertain physics of how angular momentum is transported within a star and the absence of dipolar modes in many stars may be indicative of strong internal magnetic fields. The website for the colloquium is https://physics.osu.edu/physics-colloquium-schedule. Also, there is the speaker/student discussion starting just after the colloquium, at 4:45pm in the Smith Seminar Room. 1080 Physics Research Building, The Robert Smith Seminar Room Center for Cosmology and AstroParticle Physics (CCAPP) ccapp@osu.edu America/New_York public

Speaker: Lars Bildsten (UC Santa Barbara)

Long-term and sensitive space-based photometry from the CoRoT, Keplerand TESS satellites has allowed us to finally 'hear' the stars. These remarkable data have yielded accurate measurements of masses, radii and distances for more than 30,000 stars across the Milky Way that have been largely confirmed by the GAIAdata release. More profoundly, these observations are revealing the interior stellar conditions, clearly differentiating those stars that are undergoing helium burning in their cores to those that are only burning hydrogen in a shell. Moreover, interior rotation rates for hundreds of stars now test the uncertain physics of how angular momentum is transported within a star and the absence of dipolar modes in many stars may be indicative of strong internal magnetic fields.

The website for the colloquium is https://physics.osu.edu/physics-colloquium-schedule.

Also, there is the speaker/student discussion starting just after the colloquium, at 4:45pm in the Smith Seminar Room.