Relevant publication:

Testing Systematics of Gaia DR2 Parallaxes with Empirical Surface Brightness: Color Relations Applied to Eclipsing Binaries

Graczyk D., Pietrzyński G., Gieren W., Storm J., Nardetto N., Gallenne A., Maxted P., Kervella P., Kołaczkowski Z., Konorski P.

2019, ApJ, 872, 85 (← click to see the publication at ADS/arXiv)

Testing Systematics of Gaia DR2 Parallaxes with Empirical Surface Brightness: Color Relations Applied to Eclipsing Binaries