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We study the redshift evolution of the X-ray and Sunyaev-Zel'dovich (SZ)scaling relations for galaxy groups and clusters in the FABLE suite ofcosmological hydrodynamical simulations. Using an expanded sample of $27$high-resolution zoom-in simulations, together with a uniformly-sampledcosmological volume to sample low-mass systems, we find very good agreementwith the majority of observational constraints up to $z \sim 1$. We predictsignificant deviations of all examined scaling relations from the simpleself-similar expectations. While the slopes are approximately independent ofredshift, the normalisations evolve positively with respect to self-similarity,even for commonly-used mass proxies such as the $Y_{\mathrm{X}}$ parameter.These deviations are due to a combination of factors, including more effectiveAGN feedback in lower mass haloes, larger binding energy of gas at a given halomass at higher redshifts and larger non-thermal pressure support from kineticmotions at higher redshifts. Our results have important implications forcluster cosmology from upcoming SZ surveys such as SPT-3G, ACTpol and CMB-S4,as relatively small changes in the observable--mass scaling relations (withintheoretical uncertainties) have a large impact on the predicted number ofhigh-redshift clusters and hence on our ability to constrain cosmology usingcluster abundances. In addition, we find that the intrinsic scatter of therelations, which agrees well with most observational constraints, increases atlower redshifts and for lower mass systems. This calls for a more complexparametrization than adopted in current observational studies to be able toaccurately account for selection biases.

The redshift evolution of X-ray and Sunyaev-Zel'dovich scaling relations in the FABLE simulations