Title:

Mapping the Universe Traced by Galaxies at z=3-7



Masami Ouchi
Space Telescope Science Institute



Abstract:

I will present results of our on-going survey for
proto-clusters and large-scale structures at z=3-7. We have
carried out very deep wide-field optical imaging down to
i'=27.5 for the contiguous 1 deg^2 field of the Subaru/XMM
Deep Field with Subaru/Suprime-Cam. We have obtained maps of
the Universe traced by ~20,000 Lyman break galaxies (LBGs)
and ~1,000 Ly-a emitters (LAEs) at z=3-6. For the scale of
galaxy groups (<1Mpc), I will show the definitive detection
of small-scale excess of angular correlation function for
LBGs, which indicate that multiple high-z galaxies occupying
a single dark halo with a mass of 10^11-10^12 Mo. For the
scale of clusters (~1 Mpc) to large-scale structures (~100
Mpc), I will report the discovery of filamentary large-scale
structures made of LAEs at z=5.7. In the densest regions of
the filamentary LSSs, we have identified two concentrations
of LAEs at z=5.67 and 5.69. These concentrations show about
130 times higher star-formation rate density than the mean
field at z=5.7. These concentrations may be clusters in a
formation phase involving a burst of galaxy formation.