A spin-down clock for cool stars from observations of a 2.5-billion-year-old cluster

Søren Meibom (), Sydney A. Barnes, Imants Platais, Ronald L. Gilliland, David W. Latham and Robert D. Mathieu
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Søren Meibom: Harvard-Smithsonian Center for Astrophysics
Sydney A. Barnes: Leibniz Institute for Astrophysics, An der Sternwarte 16, 14482 Potsdam, Germany
Imants Platais: Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA
Ronald L. Gilliland: Center for Exoplanets and Habitable Worlds, The Pennsylvania State University, University Park
David W. Latham: Harvard-Smithsonian Center for Astrophysics
Robert D. Mathieu: University of Wisconsin-Madison

Nature, 2015, vol. 517, issue 7536, 589-591

Abstract: The measurement of the rotational periods of 30 cool stars in the 2.5-billion-year-old cluster NGC 6819 allows the calibration of gyrochronology — the determination of a star’s age on the basis of its rotation period — over a much broader age range than hitherto, meaning that it might be possible to determine the ages of many cool stars in the Galactic field with a precision of roughly 10 per cent.

Date: 2015
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DOI: 10.1038/nature14118

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