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Paper: Galaxy Formation and Reionization Studied by Subaru Deep- and Wide-Field Surveys
Volume: 399, Panoramic Views of Galaxy Formation and Evolution
Page: 46
Authors: Ouchi, M.
Abstract: We present recent results from our deep- and wide-field studies of Lyman-α emitters (LAEs) at z = 3.1 − 6.6 in the 1 deg2 sky of Subaru/XMM Deep Survey (SXDS). The SXDS field has a large contiguous area that provides accurate statistical measurements as well as the panoramic views (∼ 150 × 150 comoving Mpc2) at high-z. We find that the ultraviolet (UV) luminosity function of LAEs increases from z = 3.1 to 5.7, in contrast to that of dropout galaxies. It indicates the emergence of Lyman-α-emitting population at z ∼ 6. The preliminary catalog of our z = 6.6 LAEs shows that clustering of LAEs does not significantly change from z = 5.7 to 6.6. This clustering evolution places a constraint on the neutral fraction of the intergalactic medium with a theoretical model, which does not prefer the beginning of reionization at z = 6 − 7 but a moderate change of neutral fraction from z ≃ 6 to 7. In the last part of this paper, we introduce on-going high-z galaxy searches using Subaru to study reionization and galaxy formation at z = 7 − 9.
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