Subaru Seminars



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The Subaru Seminar is usually held in Room 104 of the Hilo Base Facility, adjacent to the main lobby. Everyone is welcome to attend. If you are interested in giving a seminar, please contact Subaru seminar organizers (Tomonori Usuda, Kumiko S. Usuda, Masahiko Hayashi, Masayuki Akiyama) by email.

March 4, Friday at 11:00am

" Mapping the Universe with Galaxies at z=3-6 in the Subaru/XMM-Newton Deep Field;

Masami Ouchi (Space Telescope Science Institute)

I will present clustering properties of galaxies at z=3-6 in the 1 deg^2 sky of the Subaru/XMM-Newton Deep Field (SXDF). We have obtained about 20,000 Lyman Break Galaxies (LBGs) at z=3.5-6.2 and 1,000 Lyman alpha Emitters (LAEs) at z~3.1,3.7, and 5.7. Taking advantage of the largest and widest high-z galaxy samples ever obtained, we have investigated the distribution of high-z galaxies. The angular correlation functions of LBGs show a significant excess of clustering in a small angular scale, which is the evidence for the multiple occupation of LBGs in a single dark halo with a mass of ~10^12 Mo. The distribution of LAEs show filamentary large-scale structures with 10-40 Mpc scale voids. We have identified a very dense region of LAEs (4.8 sigma level) at z=5.7 in the southern area of the SXDF. Our spectroscopic follow-up observations revealed two concentrations made of 6 LAEs at z=5.69 and 4 LAEs at z=5.67, respectively, distributed in a 1-Mpc sphere. These concentrations have about 130 times higher star-formation rate density than the field. These concentrations may be proto-clusters just beginning to form. I will discuss the formation of clusters and large-scale structures based on these results.

Seminars are also held at JAC, CFHT, and IfA.

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