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WIYN Open Cluster Study: Tidal Interactions in Solar type Binaries

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arxiv astro-ph/0303197 v1 pith:XHJUNJ73 submitted 2003-03-10 astro-ph

WIYN Open Cluster Study: Tidal Interactions in Solar type Binaries

classification astro-ph
keywords tidalcircularizationbinaryphasecutoffdatainteractionsmain-sequence
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present an ongoing study on tidal interactions in late-type close binary stars. New results on tidal circularization are combined with existing data to test and constrain theoretical predictions of tidal circularization in the pre-main-sequence (PMS) phase and throughout the main-sequence phase of stellar evolution. Current data suggest that tidal circularization during the PMS phase sets the tidal cutoff period for binary populations younger than ~1 Gyr. Binary populations older than ~1 Gyr show increasing tidal cutoff periods with age, consistent with active main-sequence tidal circularization.

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