The old subgiant 31 Aql exhibits a strong non-cycling magnetic field and revived wind braking torque consistent with a shift to anti-solar differential rotation.
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Stellar magnetic cycle variability decreases with faster rotation and higher dynamo number, shown by positive correlation with rotation period and negative correlations with Ro^{-2} and cycle-to-rotation ratio in Mount Wilson data and models.
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Anti-Solar Differential Rotation May Have Revived Magnetic Braking in the Subgiant 31 Aquilae
The old subgiant 31 Aql exhibits a strong non-cycling magnetic field and revived wind braking torque consistent with a shift to anti-solar differential rotation.
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Stellar cycle variability in Mount Wilson stars and dynamo models: Rotation rate and dynamo number dependency
Stellar magnetic cycle variability decreases with faster rotation and higher dynamo number, shown by positive correlation with rotation period and negative correlations with Ro^{-2} and cycle-to-rotation ratio in Mount Wilson data and models.