What appliance can pierce through the outer layers of a star and test the conditions within?
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Goals of asteroseismology
5
Pulsation modes in a star
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Pure inertial modes
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Mode identification: p-modes
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Mode identification: P-g-and mixed modes
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Mode identification: g-modes
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Lightcurves and time bases
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Space telescopes
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Observed core rotation rates
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Cores of RGB and RC stars spin too slowly
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Core rotation rates possibly reconciled
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Age dependence of "core" rotation in B stars
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Observed core vs surface rotation rates
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Current discrepancies with AM predictions
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A star with a slightly faster rotating envelope
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Counter rotation observed in B-type star
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Example sources of internal mixing Microscopie
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Microscopic atomic diffusion needed for A-type star
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Temperature gradient determined from g-modes
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Diverse internal mixing seen in 26 SPB stars
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Signatures of magnetic fields in Red Giants Amplitude suppression
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Main-sequence intermediate mass stars
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Stochastic low-frequency variability
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Discovery of "single" sided pulsators
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Gaia-asteroseismic mass map from red giants
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Take away
Description:
Explore an in-depth overview of asteroseismology in this 58-minute conference talk from the Transport in Stellar Interiors Conference at KITP. Delve into the latest advancements in observational data, including TESS and spectroscopic studies, and their impact on our understanding of transport processes in stellar interiors. Examine various aspects of stellar physics, including heat transfer, chemical element distribution, and angular momentum. Discover how pulsation modes in stars can be used to probe their internal conditions, and learn about the different types of modes such as p-modes, g-modes, and mixed modes. Investigate the observed core rotation rates in various types of stars and the current discrepancies with angular momentum predictions. Explore the diverse internal mixing processes observed in stars and their implications for stellar evolution. Gain insights into the signatures of magnetic fields in red giants and the discovery of "single-sided" pulsators. Conclude with a look at the Gaia-asteroseismic mass map from red giants and key takeaways from this comprehensive exploration of asteroseismology.
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An Overview of Asteroseismology - May Gade Pedersen