We use VANDELS spectroscopic data overlapping with the \simeq7 Ms Chandra Deep Field South survey to extend studies of high-mass X-ray binary systems (XRBs) in 301 normal star-forming galaxies in the redshift range 3 < z < 5.5. Our analysis evaluates correlations between X-ray luminosities (L_X), star formation rates (SFR)... Show more