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There is growing evidence that high-mass star formation and hub-filamentsystems (HFS) are intricately linked. The gas kinematics along the filamentsand the forming high-mass star(s) in the central hub are in excellent agreementwith the new generation of global hierarchical high-mass star formation models.In this paper, we present an observational investigation of a typical HFScloud, G310.142+0.758 (G310 hereafter) which reveals unambiguous evidence ofmass inflow from the cloud scale via the filaments onto the formingprotostar(s) at the hub conforming with the model predictions. Continuum andmolecular line data from the ATOMS and MALT90 surveys are used that coverdifferent spatial scales. Three filaments (with total mass $5.7\pm1.1\times10^3~M_{\odot}$) are identified converging toward the central hub region whereseveral signposts of high-mass star formation have been observed. The hubregion contains a massive clump ($1280\pm260~M_{\odot}$) harbouring a centralmassive core. Additionally, five outflow lobes are associated with the centralmassive core implying a forming cluster. The observed large-scale, smooth andcoherent velocity gradients from the cloud down to the core scale, and thesignatures of infall motion seen in the central massive clump and core, clearlyunveil a nearly-continuous, multi-scale mass accretion/transfer process at asimilar mass infall rate of $\sim 10^{-3}~M_{\odot}~yr^{-1}$ over all scales,feeding the central forming high-mass protostar(s) in the G310 HFS cloud.

Direct observational evidence of the multi-scale, dynamical mass accretion toward a high-mass star forming hub-filament system