We study the dynamical status of the galaxy system ZwCl 2341.1+0000 , a filamentary multi-Mpc galaxy structure associated with a complex diffuse radio emission .

Our analysis is mainly based on new spectroscopic data for 128 galaxies acquired at the Italian Telescopio Nazionale Galileo .
We also use optical data available in the Sloan Digital Sky Survey and X-ray data from the Chandra archive .

We select 101 cluster member galaxies and compute the cluster redshift \left < z \right > \sim 0.2693 and the global line-of-sight velocity dispersion \sigma _ { V } \sim 1000 km s ^ { -1 } .

Our optical analysis agrees with the presence of at least three , likely four or more , optical subclusters causing the south-south-east–north-north-west ( SSE–NNW ) elongation of the galaxy distribution and a significant velocity gradient in the south-north direction .
In particular , we detect an important low-velocity subclump in the southern region , roughly coincident with the brightest peak of the diffuse radio emission but with a clear offset between the optical and radio peaks .
We also detect one ( or two ) optical subcluster ( s ) at north , in correspondence with the second brightest radio emission , and another one in the central cluster region , where a third diffuse radio source has been recently detected .
A more refined analysis involving the study of the 2D galaxy distribution suggests an even more complex structure .
Depending on the adopted model , we obtain a mass estimate M _ { sys } \sim 1-3 \times 10 ^ { 15 } h _ { 70 } ^ { -1 } M _ { \odot } for the whole system .

As for the X-ray analysis , we confirm the SSE–NNW elongation of the intracluster medium and detect four significant peaks .
The X-ray emission is strongly asymmetric and offsetted with respect to the galaxy distribution , thus suggesting a merger caught in the phase of post–core–core passage .

Our findings support two possible hypotheses for the nature of the diffuse radio emission of ZwCl 2341.1+0000 : a two relics + halo scenario or diffuse emission associated with the infall and merging of several galaxy groups during the first phase of the cluster formation .