Weak lensing and spectroscopic analysis of the nearby dissociative
  merging galaxy cluster Abell 3376
  The galaxy cluster Abell~3376 is a nearby (z=0.046) dissociative merging
cluster surrounded by two prominent radio relics and showing an X-ray
comet-like morphology. The merger system is comprised of the subclusters A3376W
& A3376E. Based on new deep multi-wavelength large-field images and published
redshifts, we bring new insights about the history of this merger. Despite the
difficulty of applying the weak lensing technique at such low redshift, we
successfully recovered the mass distribution in the cluster field. Moreover,
with the application of a two-body model, we have addressed the dynamics of
these merging system. We have found the individual masses of
M_{200}^{W}=3.0_{-1.7}^{+1.3}x10^{14} M_{\odot} and
M_{200}^{E}=0.9_{-0.8}^{+0.5}x10^{14} M_{\odot}. The cometary shaped X-ray
distribution shows only one peak spatially coincident with both Eastern BCG and
the A3376E mass peak whereas the gas content of A3376W seems to be stripped
out. Our data allowed us to confirm the existence of a third subcluster located
at the North, 1147+-62 kpc apart from the neighbour subcluster A3376E and
having a mass M_{200}^{N}=1.4_{-1.0}^{+0.7}x10^{14} M_{\odot}. From our
dynamical analysis, we found the merging is taking place very close to the
plane of the sky, with the merger axis just 10 deg +-11 deg from it. The
application of a two-body analysis code showed that the merging cluster is seen
0.9_{-0.3}^{+0.2} Gyr after the pericentric passage and it is currently going
to the point of maximum separation between the subclusters.
