32 research outputs found
The End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field
We report an extensive search for Lyman-alpha emitters (LAEs) at z=6.5 in the
Subaru Deep Field. Subsequent spectroscopy with Subaru and Keck identified
eight more LAEs, giving a total of 17 spectroscopically confirmed LAEs at
z=6.5. Based on this spectroscopic sample of 17, complemented by a photometric
sample of 58 LAEs, we have derived a more accurate Lyman-alpha luminosity
function of LAEs at z=6.5, which reveals an apparent deficit at the bright end
of ~0.75 mag fainter L*, compared with that observed at z=5.7. The difference
in the LAE luminosity functions between z=5.7 and 6.5 is significant at the
3-sigma level, which is reduced to 2-sigma when cosmic variance is taken into
account. This result may imply that the reionization of the universe has not
been completed at z=6.5. We found that the spatial distribution of LAEs at
z=6.5 was homogeneous over the field. We discuss the implications of these
results for the reionization of the universe.Comment: To appear in APJ vol.648. Only minor corrections have been made.
Black&White version is available at
http://zone.mtk.nao.ac.jp/~kashik/sdf/z6p5lae/paper/sdf_z6p5lae_bw.pd
Preparation of Thin Polycarbonate Film and Its Application to PIXE Analysis of Anionic Elements in Water Samples
Preparation of Thin Polycarbonate Film and Its Application to PIXE Analysis of Anionic Elements in Water Samples
開始ページ、終了ページ: 冊子体のページ付