The End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field

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dc.creatorKashikawa, N.
dc.creatorShimasaku, K.
dc.creatorMalkan, M. A.
dc.creatorDoi, M.
dc.creatorMatsuda, Y.
dc.creatorOuchi, M.
dc.creatorTaniguchi, Y.
dc.creatorLy, C.
dc.creatorNagao, T.
dc.creatorIye, M.
dc.creatorMotohara, K.
dc.creatorMurayama, T.
dc.creatorMurozono, K.
dc.creatorNariai, K.
dc.creatorOhta, K.
dc.creatorOkamura, S.
dc.creatorSasaki, T.
dc.creatorShioya, Y.
dc.creatorUmemura, M.
dc.date2006-04-06
dc.date2006-07-22
dc.date.accessioned2026-07-07T11:04:00Z
dc.date.available2026-07-07T11:04:00Z
dc.descriptionWe 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.
dc.descriptionTo 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.pdf
dc.identifierhttps://arxiv.org/abs/astro-ph/0604149
dc.identifierhttp://arxiv.org/abs/astro-ph/0604149
dc.identifierAstrophys.J.648:7-22,2006
dc.identifierdoi:10.1086/504966
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188740
dc.subjectAstrophysics
dc.titleThe End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field
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