Validating TGAS wide binaries with Gaia DR2 Radial Velocities and Parallaxes
Jeff J. Andrews, Julio Chanam\'e, Marcel A. Ag\"ueros
TL;DR
This paper uses Gaia DR2 data to validate a previously identified sample of wide stellar binaries, confirming the low contamination rate and demonstrating the effectiveness of their identification algorithm.
Contribution
The study verifies the accuracy of a wide binary identification algorithm using Gaia DR2 data, enhancing the reliability of stellar binary catalogs.
Findings
Confirmed low contamination rate of the binary sample
Validated the effectiveness of the identification algorithm
Improved confidence in wide binary catalog accuracy
Abstract
Featuring greatly improved astrometry and precise radial velocities (RVs), the second data release (DR2) from Gaia affords us a unique opportunity to test the validity of samples of stellar wide binaries. In a previous work, we presented a set of wide binaries identified in the joint Tycho-Gaia Astrometric Solution catalog. Here, we use DR2 to confirm the low contamination rate of this sample, thereby verifying the effectiveness of our algorithm for application to DR2 data.
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