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Since 2010, pioneering time-domain photometric missions (CoRoT, Kepler, and TESS) together with extreme-precision radial-velocity instruments (VLT/ESPRESSO and Keck/KPF), have revealed a rich spectrum of low-amplitude stellar variability driven by rotation, convection, and oscillations. Among these phenomena, stellar oscillations provide a powerful probe of stellar interiors, enabling unique inferences of fundamental properties and internal physics of stars. These constraints provide direct knowledge of internal composition, angular momentum transport, convection, and magnetism. These new constraints, however, also reveal significant deviations from our theoretical expectations. In this talk, I will present several recent technical, observational, and theoretical advances enabled by these data, including applications to exoplanet host characterization, post-mass-transfer systems, and mass-loss mechanisms in red giant stars. I will conclude by outlining how the coming decade—driven by ongoing and forthcoming facilities such as TESS, LSST, PLATO, Roman, CSST, and Earth2.0—will usher in a new era of stellar astrophysics, with transformative implications for stellar, Galactic and exoplanetary science.

BIO

Yaguang Li is a Beatrice Watson Parrent Fellow at University of Hawaiʻi at Mānoa. His research focuses on stellar astrophysics, with an emphasis on stellar interiors, stellar evolution and the connections between stars, planets, and the Galaxy. He received his B.S. from Beijing Normal University and Ph.D. from the University of Sydney.

Host: Huan Yang