Abstract
Gyrochronology, the empirical relation between rotation and age, can provide important leverage on important astrophysical questions ranging from basic stellar evolution models, to the timescale for the development of habitable planets, to the structural and chemical history of the Galaxy. Key to gyrochronology’s usefulness is the determination of reliable rotation rates. We present the rotational characteristics of a sample of several thousand main sequence pairs observed by NASA’s Transiting Earth Survey Satellite (TESS) and the Kepler K2 extended missions. Essentially open clusters with only two components, such pairs may help break the degeneracies in the rotation-activity-metallicity vs. age relations for main sequence stars. Support from NSF grants AST-1910396, AST-2108975 and NASA grants 80NSSC22K0622, 80NSSC21K0245, NNX16AB76G is gratefully acknowledged.
Poster presented at The Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CSW 21), 4-9 July, 2022, Toulouse, France
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