Stars

The Kepler and TESS space telescopes have produced photometric time series for hundreds of thousands of stars with a precision no ground-based facility can match. Buried in those light curves are the frequencies of stellar oscillations — asteroseismic 'heartbeats' that encode stellar age, mass, helium content, and internal rotation.

We apply encoder–decoder neural networks and Bayesian inference to extract those signals at scale. A particular focus is red giants, where the coupling of gravity and pressure modes produces mixed modes that probe the stellar core directly. Our 2025 detection of anomalously fast core rotation in a sample of red giants challenged standard stellar evolution models.