Improved Ages Estimates for Extrasolar Planet Host Stars

Details Improved Ages Estimates for Extrasolar Planet Host Stars Improved Ages Estimates for Extrasolar Planet Host Stars

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542301s&link_type=abstract

American Astronomical Society, AAS Meeting #215, #423.01; Bulletin of the American Astronomical Society, Vol. 42, p.326

Astronomy and Astrophysics

Astronomy

Scientific paper

Accurate ages of extrasolar planet host stars are useful for e.g., theoretical constraints on tidal interactions between Hot Jupiters and their host stars, dynamical modeling of exoplanetary systems, and predicting planetary luminosities. We have estimated ages for 146 extrasolar planet host stars using mean Ca H & K chromospheric activity measurements (log R'HK) from the literature combined with the improved chromospheric activity-rotation-age calibrations from Mamajek & Hillenbrand (2008). The results we obtained show a fair correlation to those derived isochronally from Takeda et al. (2007), when available. We discuss some new observational constraints on the rotational evolution of solar-type dwarf stars (from spectroscopic surveys of samples of isochronally age-dated cluster and field stars), and show the limitations of the modern gyrochronology relations.

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