Distances to Galactic X-ray Binaries with Gaia DR2

Understand

Precise and accurate measurements of distances to Galactic X-ray binaries (XRBs) reduce uncertainties in the determination of XRB physical parameters.

• We have cross-matched the XRB catalogues of Liu et al.
• (2006, 2007) to the results of Gaia Data Release 2.
• We identify 86 X-ray binaries with a Gaia candidate counterpart, of which 32 are low-mass X-ray binaries (LMXBs) and 54 are high-mass X-ray binaries (HMXBs).