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In order to study the ram-pressure interaction between radio galaxies and theintracluster medium, we analyse a sample of 208 highly-bent narrow-angle tailradio sources (NATs) in clusters, detected by the LOFAR Two-metre Sky Survey.For NATs within $7\,R_{500}$ of the cluster centre, we find that their tailsare distributed anisotropically with a strong tendency to be bent radially awayfrom the cluster, which suggests that they are predominantly on radiallyinbound orbits. Within $0.5\,R_{500}$, we also observe an excess of NATs withtheir jets bent towards the cluster core, indicating that these outboundsources fade away soon after passing pericentre. For the subset of NATs withspectroscopic redshifts, we find the radial bias in the jet angles exists evenout to $10\,R_{500}$, far beyond the virial radius. The presence of NATs atsuch large radii implies that significant deceleration of the accompanyinginflowing intergalactic medium must be occurring there to create the rampressure that bends the jets, and potentially even triggers the radio source.

Clusters' far-reaching influence on narrow-angle tail radio galaxies