Main-sequence Kepler stars exhibit enhanced chromospheric Ca II IRT activity after the intermediate-period gap, paralleling the photospheric Sph signature.
YREC: The Yale Rotating Stellar Evolution Code
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abstract
The stellar evolution code YREC is outlined with emphasis on its applications to helio- and asteroseismology. The procedure for calculating calibrated solar and stellar models is described. Other features of the code such as a non-local treatment of convective core overshoot, and the implementation of a parametrized description of turbulence in stellar models, are considered in some detail. The code has been extensively used for other astrophysical applications, some of which are briefly mentioned at the end of the paper.
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astro-ph.SR 1years
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Hints of enhanced magnetic activity after the intermediate rotation period gap as traced by the chromospheric Ca ii infrared triplet
Main-sequence Kepler stars exhibit enhanced chromospheric Ca II IRT activity after the intermediate-period gap, paralleling the photospheric Sph signature.