Overdensity of SubMillimiter Galaxies in the GJ526 Field mapped with the
  NIKA2 Camera
  Using the NIKA2 dual band millimeter camera installed on the IRAM30m
telescope, we have mapped a relatively large field (~70 arcmin^2) in the
direction of the star GJ526 to investigate the nature of the sources found with
the MAMBO camera at 1.2 mm ten years earlier. We have found that they must be
dust-obscured galaxies (SMGs) in the background beyond the star. The new NIKA2
map at 1.15 mm reveals additional sources and, in fact, an overdensity of SMGs
predominantly distributed along a filament-like structure in projection on the
sky across the whole observed field. We speculate this might be a cosmic
filament at high redshift as revealed in cosmological hydrodynamical
simulations. Measurement of spectroscopic redshifts of the SMGs in the
candidate filament is required now for a definitive confirmation of the nature
of the structure.
