J. Weingrill

Leibniz Institute for Astrophysics Potsdam

Papers

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About

J. Weingrill is a stellar astrophysicist whose research centers on the rotation, magnetic activity, and evolution of cool stars in open clusters. By measuring rotation periods for low-mass stars in clusters of known age, Weingrill has helped calibrate gyrochronology—the use of stellar spin-down as a precise age-dating tool. Their work on NGC 2281 (2023, 10 citations) resolved a long-standing age discrepancy for that cluster, narrowing the range from 275–630 Myr to a rotation-based estimate, demonstrating the power of this technique. In studies of IC 4756 (2015, 7 citations), Weingrill explored the interplay between rotation, binarity, and lithium abundance, shedding light on how magnetic activity and interior mixing drive stellar evolution. Their analysis of NGC 6709 (2023, 6 citations) further tested the universality of spin-down models across different cluster populations. Collectively, Weingrill’s contributions have advanced our understanding of how mass, rotation, and age are linked in Sun-like and cooler stars, providing essential benchmarks for stellar evolution models and making open clusters key laboratories for these investigations.