Asteroseismology, Exoplanets, and Galactic Archaeology: intriguing matches along the (Milky) way [mehr]

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I will talk about my recent effort in developing the asymptotic theory of solar-like oscillations in red-giant stars. The asymptotic parameters that explain the frequency spectrum include not only the large frequency separation and the period spacing but also the coupling factor and the gravity offset, to which I will pay special attention. I will particularly discuss the reason why we sometimes observe the coupling factor larger than 1/4, and how the physical origins of the gravity offset can be identified. [mehr]

Acoustic glitches can be used to track the gradual expansion of solar-like stars in the main sequence and therefore they hold potential as a diagnosis of stellar age. I will present the age sensitivity of the glitches produced by the base of the outer convection zone and the second helium ionization zone in stellar models and show how they can deliver ages with precision < 10% when the mass and the composition of the star are known. [mehr]