ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Masami Ouchi (ICRR)
Title: Probing the Epoch of Reionization
Date (JST): Thu, Jul 21, 2011, 13:30 - 15:00
Place: Seminar Room A
Related File: 493.pdf
Abstract: I present recent results from our Subaru-Keck deep wide-field survey. In the first half of my talk, I show the largest sample, to date, of 207 Lya emitters (LAEs) at z~7 in a large 1 deg2 area, and discuss galaxy formation and reionization based on the evolution of luminosity function, clustering, and Lya line profiles including errors of statistics and cosmic variance.
In the second half of my talk, I introduce our new results of z-dropout spectroscopy. We discover a z=7.213 galaxy that is the most distant galaxy so far confirmed with a robust skewness measurement of Lya line.
Our Lya demography of z-dropout galaxies would indicate a large increase of IGM neutral hydrogen fraction towards z=7, and support inside-out reionization models.