We perform a search for wide binaries in the Kepler field with the prospect of providing new constraints for gyrochronology .
First , we construct our base catalog by compiling astrometry for the stars observed by Kepler , and supplement it with parallaxes , radial velocities ( RVs ) , and metallicities .
We then mine our base catalog for wide binary candidates by matching the stars ’ proper motions , as well as parallaxes , RVs , and metallicities , if available .
We mitigate the presence of chance alignments among our candidates by performing a comprehensive data-based contamination analysis in the proper motion versus angular separation phase space .
Our final sample contains 55 binary candidates .
A crossmatch of our pairs with the Second Data Release ( DR2 ) from Gaia validates our candidates and confirms the reliability of our search method , particularly for \varpi \gtrsim 2 mas .
Due to the implicit Kepler selection function and image scale per pixel , our binary search is incomplete for angular separations of \Delta \theta \lesssim 20 \arcsec .
We crossmatch our candidates with rotation period and asteroseismic ages catalogs , and find that our binary candidates do not follow a simple period-color relation , in agreement with previous studies .
Two pairs have an age estimate for one component star and rotation period for its companion , positioning them as potentially new gyrochronology constraints at old ages .
This is the first study that uses RVs and metallicities as criteria , rather than as a confirmation , in a binary search .