The End of the Reionization Epoch Probed by Lyα Emitters at z = 6.5 in the Subaru Deep Field* **
Nobunari Kashikawa,Kazuhiro Shimasaku,Matthew A. Malkan,Mamoru Doi,Yuichi Matsuda,Masami Ouchi,Yoshiaki Taniguchi,Chun Ly,Tohru Nagao,Masanori Iye,Kentaro Motohara,Takashi Murayama,Kouji Murozono,Kyoji Nariai,Kouji Ohta,Sadanori Okamura,Toshiyuki Sasaki,Yasuhiro Shioya,Masayuki Umemura +18 more
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TLDR
In this article, an extensive search for Lyα emitters (LAEs) at z = 6.5 in the Subaru Deep Field was conducted, which revealed an apparent deficit at the bright end of ∼ 0.75 mag fainter L*, compared with that observed at z=5.7.Abstract:
We report an extensive search for Lyα 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 Lyα 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 σ level, which is reduced to 2 σ 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. © 2006. The American Astronomical Society. All rights reserved.read more
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Five-year wilkinson microwave anisotropy probe * observations: likelihoods and parameters from the wmap data
Jo Dunkley,Jo Dunkley,Eiichiro Komatsu,M. R. Nolta,David N. Spergel,Davin Larson,Gary Hinshaw,Lyman A. Page,Charles L. Bennett,B. Gold,N. Jarosik,Janet Weiland,Mark Halpern,Robert S. Hill,Alan J. Kogut,Michele Limon,S. S. Meyer,Gregory S. Tucker,Edward J. Wollack,Edward L. Wright +19 more
TL;DR: In this paper, the authors present cosmological constraints from the Wilkinson Microwave Anisotropy Probe (WMAP) alone for both the ACDM model and a set of possible extensions.
Journal ArticleDOI
STATISTICS OF 207 Lyα EMITTERS AT A REDSHIFT NEAR 7: CONSTRAINTS ON REIONIZATION AND GALAXY FORMATION MODELS*
Masami Ouchi,Kazuhiro Shimasaku,Hisanori Furusawa,Tomoki Saito,Makiko Yoshida,Masayuki Akiyama,Yoshiaki Ono,Toru Yamada,Kazuaki Ota,Nobunari Kashikawa,Masanori Iye,Tadayuki Kodama,Sadanori Okamura,Chris Simpson,Michitoshi Yoshida +14 more
TL;DR: In this paper, the authors presented the Ly{alpha} luminosity function (LF), clustering measurements, and Ly{α} line profiles based on the largest sample to date of 207 Lyα emitters (LAEs) at z = 6.6 on the 1 deg{sup 2} sky of Subaru/XMM-Newton Deep Survey field.
Journal ArticleDOI
The Subaru/XMM-Newton Deep Survey (SXDS). IV. Evolution of Lyα Emitters from z = 3.1 to 5.7 in the 1 deg2 Field: Luminosity Functions and AGN*
Masami Ouchi,Kazuhiro Shimasaku,Masayuki Akiyama,Chris Simpson,T. Saito,Yoshihiro Ueda,Hisanori Furusawa,Kazuhiro Sekiguchi,Toru Yamada,Tadayuki Kodama,Nobunari Kashikawa,Sadanori Okamura,Masanori Iye,Tadafumi Takata,Michitoshi Yoshida,Makiko Yoshida +15 more
TL;DR: In this article, the luminosity functions (LFs) and various properties of Lyα emitters (LAEs) at z = 3.1, 3.7, and 5.7 in a 1 deg2 sky of the Subaru/XMM-Newton Deep Survey (SXDS) Field were presented.
Journal ArticleDOI
21cmfast: a fast, seminumerical simulation of the high‐redshift 21‐cm signal
TL;DR: 21cmFAST as discussed by the authors is a semi-numeric modeling tool designed to simulate the cosmological 21-cm signal, which can be used to compute the brightness temperature.
Journal ArticleDOI
New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
Brant Robertson,Steven R. Furlanetto,Evan E. Schneider,Stephane Charlot,Richard S. Ellis,Daniel P. Stark,Ross J. McLure,James Dunlop,Anton M. Koekemoer,Matthew A. Schenker,Masami Ouchi,Yoshiaki Ono,Emma Curtis-Lake,Alexander B. Rogers,Rebecca A. A. Bowler,Michele Cirasuolo +15 more
TL;DR: The 2012 UDF12 campaign provided the best constraints to date on the abundance, luminosity distribution, and spectral properties of early star-forming galaxies as discussed by the authors, and the results of the UDF-12 campaign were used to infer redshift-dependent ultraviolet (UV) luminosity densities, reionization histories, and electron scattering optical depth evolution consistent with the available data.
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Proceedings ArticleDOI
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Journal ArticleDOI
Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar
Robert H. Becker,Xiaohui Fan,Richard L. White,Michael A. Strauss,Vijay K. Narayanan,Robert H. Lupton,James E. Gunn,James Annis,Neta A. Bahcall,J. Brinkmann,A. J. Connolly,István Csabai,Paul C. Czarapata,Mamoru Doi,Timothy M. Heckman,Gregory S. Hennessy,Zeljko Ivezic,Gillian R. Knapp,D. Q. Lamb,Timothy A. McKay,Jeffrey A. Munn,Thomas Nash,Robert C. Nichol,Jeffrey R. Pier,Gordon T. Richards,Donald P. Schneider,Chris Stoughton,Alexander S. Szalay,Anirudda R. Thakar,D. G. York +29 more
TL;DR: In this article, moderate resolution Keck spectroscopy of quasars at z=5.82, 5.99 and 6.28 was presented, and it was shown that the Ly Alpha absorption in the spectra evolves strongly with redshift.