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Age determination is undertaken for nearby early-type (BAF) stars, whichconstitute attractive targets for high-contrast debris disk and planet imagingsurveys. Our analysis sequence consists of: acquisition of uvby{\beta}photometry from catalogs, correction for the effects of extinction,interpolation of the photometry onto model atmosphere grids from whichatmospheric parameters are determined, and finally, comparison to thetheoretical isochrones from pre-main sequence through post-main sequencestellar evolution models, accounting for the effects of stellar rotation. Wecalibrate and validate our methods at the atmospheric parameter stage bycomparing our results to fundamentally determined Teff and log g values. Wevalidate and test our methods at the evolutionary model stage by comparing ourresults on ages to the accepted ages of several benchmark open clusters (IC2602, {\alpha} Persei, Pleiades, Hyades). Finally, we apply our methods toestimate stellar ages for 3493 field stars, including several with directlyimaged exoplanet candidates.

astrophysical journal/the astrophysical journal

The Ages of Early-Type Stars: Str\"omgren Photometric Methods  Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of  Directly Imaged Exoplanets