3 papers
astro-ph.SR2025
Rotation Periods for Stars in Open Cluster NGC 6819 From Kepler IRIS Light Curves
Sabina Sagynbayeva, Isabel L. Colman, Will M. Farr
We present an updated catalog of stellar rotation periods for the 2.5 Gyr open cluster NGC 6819 using the Kepler IRIS light curves from superstamp data. Our analysis uses Gaussian…
astro-ph.EP2025
Polka-dotted Stars II: Starspots and obliquities of Kepler-17 and Kepler-63
Sabina Sagynbayeva, Will M. Farr
Starspots trace stellar magnetic activity and influence both stellar evolution and exoplanet characterization. While occultation-based spot analyses have been applied to individual…
astro-ph.EP2025
Polka-dotted Stars: a Hierarchical Model for Mapping Stellar Surfaces Using Occultation Light Curves and the Case of TOI-3884
Sabina Sagynbayeva, Will M. Farr, Brett Morris +1
We present StarryStarryProcess, a novel hierarchical Bayesian framework for mapping stellar surfaces using exoplanet transit light curves. While previous methods relied solely on s…