Christopher Lindsay

Talk: Christopher Lindsay, 3:00pm - 3:30pm
Stellar astrophysics and galactic archaeology with asteroseismology
The analysis of stellar oscillations, known as asteroseismology, has enabled detailed studies of the interior structures of stars, particularly subgiants and red giants. Since many areas of astrophysics rely on stellar modeling, asteroseismology provides a vital tool for improving our understanding of how astrophysical systems evolve over time. My research leverages the wealth of data from the Kepler and TESS missions to model stars in detail and refine how stellar interior models are calculated. In this talk, I will focus on how oscillation measurements inform the treatment of convective boundaries in stellar models, especially for red giants and stars with convective cores (Lindsay et al. 2022, 2024). I will also discuss how detailed asteroseismic modeling enables precise age determinations for notable stars. As an example, I will present the detailed asteroseismic modeling of two of the brightest red giants in the Helmi Streams—the remnants of a dwarf galaxy accreted by the Milky Way (Lindsay et al. 2025).