Probe the reionization process with first galaxies

• Project/Area Number: 19540246
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: KASHIKAWA Nobunari National Astronomical Observatory of Japan, 光赤外研究部, 准教授 (00290883)
• Co-Investigator(Kenkyū-buntansha): SHIMASAKU Kazuhiro 東京大学, 理学研究科, 准教授 (00251405) ; MOTOHARA Kentaro 東京大学, 理学研究科, 助教 (90343102)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 再電離 / 初期宇宙 / ライマンα輝線銀河 / ライマンブレイク銀河 / 銀河形成 / 銀河進化 / 宇宙の大規模構造 / 遠方宇宙

Research Abstract

We have obtained the largest spectroscopic sample of Lyman alpha emitting galaxies at z=5.7 and 6.5 by using Subaru and Keck telescopes. We have derived a more accurate Lyα luminosity function of LAEs at z=6.5, which reveals an apparent deficit at the bright end that observed at z=5.7. This result may imply that the reionization of the universe has not been completed at z=6.5.

Research Products

• [Journal Article] A search for galaxies in and around an HI overdense region at z = 5 (2010)
  • Author(s): Y. Matsuda, N. Kashikawa, K. Shimasaku, et. al.
  • Journal Title: MNRAS 403 Pages: 54-58
  • Peer Reviewed
• [Journal Article] Subaru FOCAS Spectroscopic Observations of High-Redshift Supernovae (2010)
  • Author(s): T. Morokuma, N. Kashikawa, et. al.
  • Journal Title: PASJ 62 Pages: 19-37
  • NAID: 10026713726
  • Peer Reviewed
• [Journal Article] A search for galaxies in and around an HI overdense region at z=5 (2010)
  • Author(s): Y.Mastuda, et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society 403
  • Peer Reviewed
• [Journal Article] Subaru FOCAS Spectroscopic Observations of High-Redshift Supernovae (2010)
  • Author(s): T.Morokuma, et al.
  • Journal Title: Publication of Astronomical Society of Japan 62 Pages: 19-37
  • Peer Reviewed
• [Journal Article] Large Area Survey for z = 7 Galaxies in SDF and GOODS-N: Implications for Galaxy Formation and Cosmic Reionization (2009)
  • Author(s): M. Ouchi, K. Shimasaku, N. Kashikawa, et. al.
  • Journal Title: APJ 706 Pages: 1136-1151
  • Peer Reviewed
• [Journal Article] An Intensive Hubble Space Telescope Survey for z>1 Type Ia Supernovae by Targeting Galaxy Clusters (2009)
  • Author(s): K.S. Dawson, N. Kashikawa, et. al.
  • Journal Title: AJ 138 Pages: 1271-1283
  • Peer Reviewed
• [Journal Article] Subaru Weak-Lensing Survey II: Multi-Object Spectroscopy and Cluster Masses (2009)
  • Author(s): T. Hamana, N. Kashikawa, et. al.
  • Journal Title: PASJ 61 Pages: 833-872
  • NAID: 10025600909
  • Peer Reviewed
• [Journal Article] Lyman Break Galaxies at z≈1.8-2.8: GALEX/NUV Imaging of the Subaru Deep Field (2009)
  • Author(s): C. Ly, N. Kashikawa, K. Shimasaku, et. al.
  • Journal Title: APJ 697 Pages: 1410-1432
  • Peer Reviewed
• [Journal Article] Subaru Mid-Infrared Imaging of the Quadruple Lenses. II. Unveiling Lens Structure of MG0414+0534 and Q2237+030 (2009)
  • Author(s): T. Minezaki, N. Kashikawa, et. al.
  • Journal Title: APJ 697 Pages: 610-618
  • Peer Reviewed
• [Journal Article] Discovery of a Giant LyαEmitter Near the Reionization Epoch (2009)
  • Author(s): M. Ouchi, K. Shimasaku, N. Kashikawa, et. al.
  • Journal Title: APJ 696 Pages: 1164-1175
  • Peer Reviewed
• [Journal Article] Star Formation Rates and Metallicities of K-Selected Star-Forming Galaxies at z ~ 2 (2009)
  • Author(s): M. Hayashi, K. Shimasaku, K. Motohara, N. Kashikawa, et. al.
  • Journal Title: APJ 691 Pages: 140-151
  • Peer Reviewed
• [Journal Article] Large Area Survey for z=7 Galaxies in SDF and GOODS-N : Implications for Galaxy Formation and Cosmic Reionization (2009)
  • Author(s): M.Ouchi, et al.
  • Journal Title: The Astrophysical Journal 706 Pages: 1136-1151
  • Peer Reviewed
• [Journal Article] An Intensive Hubble Space Telescope Survey for z>1 Type Ia Supernovae by Targeting Galaxy Clusters (2009)
  • Author(s): K.S.Dawson, et al.
  • Journal Title: The Astronomical Journal 138 Pages: 1271-1283
  • Peer Reviewed
• [Journal Article] Subaru Weak-Lensing Survey II : Multi-Object Spectroscopy and Cluster Masses (2009)
  • Author(s): T.Hamana, et al.
  • Journal Title: Publication of Astronomical Society of Japan 61 Pages: 833-872
  • Peer Reviewed
• [Journal Article] Lyman Break Galaxies at z=1.8-2.8 : GALEX/NUV Imaging of the Subaru Deep Field (2009)
  • Author(s): C.Ly, et al.
  • Journal Title: The Astrophysical Journal 697 Pages: 1410-1432
  • Peer Reviewed
• [Journal Article] Subaru Mid-Infrared Imaging of the Quadruple Lenses. II. Unveiling Lens Structure of MG0414+0534 and Q2237+030 (2009)
  • Author(s): T.Minezaki, et al.
  • Journal Title: The Astrophysical Journal 697 Pages: 610-618
  • Peer Reviewed
• [Journal Article] Discovery of a Giant Lyα Emitter Near the Reionization Epoch (2009)
  • Author(s): M.Ouchi, et al.
  • Journal Title: The Astrophysical Journal 696 Pages: 1164-1175
  • Peer Reviewed
• [Journal Article] Star Formation Rates and Metallicities of K-Selected Star-Forming Galaxies at z～2 (2009)
  • Author(s): M.Hayashi, et al.
  • Journal Title: The Astrophysical Journal 691 Pages: 140-151
  • Peer Reviewed
• [Journal Article] Strange Filamentary Structures ("Fireballs") around a Merger Galaxy in the Coma Cluster of Galaxies (2008)
  • Author(s): M. Yoshida, N. Kashikawa, et. al.
  • Journal Title: APJ 688 Pages: 918-930
  • Peer Reviewed
• [Journal Article] The Subaru/XMM-Newton Deep Survey (SXDS). IV. Evolution of LyαEmitters from z=3. 1 to 5. 7 in the 1 deg2 Field: Luminosity Functions and AGN (2008)
  • Author(s): M. Ouchi, K. Shimasaku, N. Kashikawa, et. al.
  • Journal Title: APJS 176 Pages: 301-330
  • Peer Reviewed
• [Journal Article] A Photometric Survey for Lyα-He II Dual Emitters: Searching for Population III Stars in High-Redshift Galaxies (2008)
  • Author(s): T. Nagao, N. Kashikawa, et. al.
  • Journal Title: APJ 680 Pages: 100-109
  • Peer Reviewed
• [Journal Article] The Overdense Environment of a Large LyαNebula at z ~ 2. 7 (2008)
  • Author(s): M. Prescott, N. Kashikawa, et. al.
  • Journal Title: APJ 678 Pages: 77-80
  • Peer Reviewed
• [Journal Article] Reionization and Galaxy Evolution Probed by z = 7 LyαEmitters (2008)
  • Author(s): K. Ota, N. Kashikawa, K. Shimasaku, K. Motohara, et. al.
  • Journal Title: APJ 676 Pages: 163-183
  • Peer Reviewed
• [Journal Article] The Subaru/XMM-Newton Deep Survey (SXDS). V. Optically Faint Variable Object Survey (2008)
  • Author(s): T. Morokuma, N. Kashikawa, et. al.
  • Journal Title: APJ 676 Pages: 163-183
  • Peer Reviewed
• [Journal Article] The Subaru/XMM-Newton Deep Survey (SXDS). VI. Properties of Active Galactic Nuclei Selected by Optical Variability (2008)
  • Author(s): T. Morokuma, N. Kashikawa, et. al.
  • Journal Title: APJ 676 Pages: 121-130
  • Peer Reviewed
• [Journal Article] Reionization and Galaxy Evolution Probed by z=7 LyαEmitters (2008)
  • Author(s): K. Ota, et al.
  • Journal Title: The Astrophysical Journal 677 Pages: 12-26
  • Peer Reviewed
• [Journal Article] The Overdense Environment of a Large Lyα Nebula at z 2.7 (2008)
  • Author(s): M. Prescott, et al.
  • Journal Title: The Astrophysical Journal Letters 678 Pages: 77-80
  • Peer Reviewed
• [Journal Article] A Photometric Survey for Lyα-He II Dual Emitters : Searching for Population III stars in High-Redshift Galaxies (2008)
  • Author(s): T. Nagao, et al.
  • Journal Title: The Astrophysical Journal 680 Pages: 100-109
  • Peer Reviewed
• [Journal Article] 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 Fundions and AGN (2008)
  • Author(s): M. Ouchi, et al.
  • Journal Title: The Astrophysical Journal Supplement 176 Pages: 301-330
  • Peer Reviewed
• [Journal Article] A Subaru Weak-Lensing Survey. I. Cluster Candidates and Spectroscopic Verification (2007)
  • Author(s): S. Miyazaki, N. Kashikawa, et. al.
  • Journal Title: APJ 669 Pages: 714-728
  • Peer Reviewed
• [Journal Article] Spectroscopic Analysis of H I Absorption-Line Systems in 40 HIRES Quasars (2007)
  • Author(s): T. Misawa, N. Kashikawa, et. al.
  • Journal Title: AJ 134 Pages: 1634-1634
  • NAID: 120007102754
  • Peer Reviewed
• [Journal Article] Searching for a Companion Star of Tycho's Type Ia Supernova with Optical Spectroscopic Observations (2007)
  • Author(s): Y. Ihara, N. Kashikawa, et. al.
  • Journal Title: PASJ 59 Pages: 811-826
  • NAID: 10023946727
  • Peer Reviewed
• [Journal Article] A huge filamentary structure at z = 0. 55 and star formation histories of galaxies at z < 1 (2007)
  • Author(s): M. Tanaka, N. Kashikawa, et. al.
  • Journal Title: MNRAS 379 Pages: 1546-1556
  • Peer Reviewed
• [Journal Article] Quantitative comparison between type Ia supernova spectra at low and high redshifts: a case study (2007)
  • Author(s): G. Garavini, N. Kashikawa, et. al.
  • Journal Title: A&A 470 Pages: 411-424
  • Peer Reviewed
• [Journal Article] Rest-Frame R-band Light Curve of a z ~ 1. 3 Supernova Obtained with Keck Laser Adaptive Optics (2007)
  • Author(s): J. Melbourne, N. Kashikawa, et. al.
  • Journal Title: AJ 133 Pages: 2709-2715
  • Peer Reviewed
• [Journal Article] The kinematics of intracluster planetary nebulae and the on-going subcluster merger in the Coma cluster core (2007)
  • Author(s): O. Gerhard, N. Kashikawa, et. al.
  • Journal Title: A&A 468 Pages: 815-822
  • Peer Reviewed
• [Journal Article] The Remarkable 60×2 kpc Optical Filament Associated with a Poststarburst Galaxy in the Coma Cluster (2007)
  • Author(s): M. Yagi, N. Kashikawa, et. al.
  • Journal Title: APJ 660 Pages: 1209-1214
  • Peer Reviewed
• [Journal Article] Integral Field Spectroscopy of the Quadruply Lensed Quasar 1RXS J1131-1231: New Light on Lens Substructures (2007)
  • Author(s): H. Sugai, N. Kashikawa, et. al.
  • Journal Title: APJ 660 Pages: 1016-1022
  • Peer Reviewed
• [Journal Article] Results of Monitoring the Dramatically Variable C IV Mini-Broad Absorption Line System in the Quasar HS 1603+3820 (2007)
  • Author(s): T. Misawa, N. Kashikawa, et. al.
  • Journal Title: APJ 660 Pages: 152-166
  • Peer Reviewed
• [Journal Article] Luminosity-Dependent Clustering of Star-forming BzK Galaxies at Redshift 2 (2007)
  • Author(s): M. Hayashi, K. Shimasaku, K. Motohara, N. Kashikawa, et. al.
  • Journal Title: APJ 660 Pages: 72-80
  • Peer Reviewed
• [Journal Article] Multi-Slit Imaging Spectroscopy Technique: Catalog of Intracluster Planetary Nebulae in the Coma Cluster (2007)
  • Author(s): M. Arnaboldi, N. Kashikawa, et. al.
  • Journal Title: PASJ 59 Pages: 419-425
  • NAID: 10023945205
  • Peer Reviewed
• [Journal Article] The Luminosity Function and Star Formation Rate between Redshifts of 0. 07 and 1. 47 for Narrowband Emitters in the Subaru Deep Field (2007)
  • Author(s): C. Ly, N. Kashikawa, K, Shimasaku, K. Motohara, et. al.
  • Journal Title: APJ 657 Pages: 738-759
  • Peer Reviewed
• [Journal Article] The End of the Reionization Epoch Probed by LyαEmitters at z=6. 5 (2007)
  • Author(s): N. Kashikawa
  • Journal Title: Highlights of Astronomy 14 Pages: 256-256
  • Peer Reviewed
• [Journal Article] High-redshift Lyαemitters with a large equivalent width. Properties of i'-dropout galaxies with an NB921-band depression in the Subaru deep field (2007)
  • Author(s): T. Nagao, N. Kashikawa, et. al.
  • Journal Title: A&AP 468 Pages: 877-883
  • Peer Reviewed
• [Journal Article] The Habitat Segregation between Lyman Break Galaxies and LyαEmitters around a QSO at z ~ 5 (2007)
  • Author(s): N. Kashikawa, et. al.
  • Journal Title: APJ 663 Pages: 765-773
  • Peer Reviewed
• [Journal Article] The Habitat Segregation between Lyman Break Galaxies and Lya Emitters around a QSO at z〜5 (2007)
  • Author(s): N. Kashikawa, et. al.
  • Journal Title: The Astrophysical Journal 663 Pages: 765-773
  • Peer Reviewed
• [Journal Article] High-redshift Lya emitters with a large equivalent width. Properties of i'-dropout galasxies with an NB921-band depression in the Subaru deep field (2007)
  • Author(s): T. Nagao, et. al.
  • Journal Title: Astronomy & Astrophysics 468 Pages: 877-883
  • Peer Reviewed
• [Journal Article] The End of the Reionization Epoch Probed by Lya Emitters at z=6.5 (2007)
  • Author(s): N. Kashikawa
  • Journal Title: Highlights of Astronomy 14 Pages: 256-256
• [Journal Article] The Luminosity Function and Star Formation Rate between Redshifts of 0.07 and 1.47 for Narrowband Emitters in the Subaru Deep Field (2007)
  • Author(s): C. Ly, et. al.
  • Journal Title: The Astrophysical Journal 657 Pages: 738-759
  • Peer Reviewed
• [Journal Article] The Aspherical Properties of the Energetic Type Ic SN 2002ap as Inferred from Its Nebular Spectra
  • Author(s): P. Mazalli, N. Kashikawa
  • Journal Title: APJ 670 Pages: 592-599
  • Peer Reviewed
• [Presentation] TMTで探る銀河形成・銀河進化 (2010)
  • Author(s): 柏川伸成
  • Organizer: 日本天文学会
  • Place of Presentation: 広島大学、広島県
• [Presentation] HSCとTMTのシナジー (2010)
  • Author(s): 柏川伸成
  • Organizer: HSC研究会
  • Place of Presentation: 弘前大学、岩手県
• [Presentation] TMT project (2010)
  • Author(s): 柏川伸成
  • Organizer: 巨大ブラックホールと銀河の共進化
  • Place of Presentation: 筑波大学、茨城県
• [Presentation] TMT project (2010)
  • Author(s): 柏川伸成
  • Organizer: 大望遠鏡による高分散分光観測の展望
  • Place of Presentation: 国立天文台、東京都
• [Presentation] TMT Project (2010)
  • Author(s): 柏川伸成
  • Organizer: 大望遠鏡による高分散分光観測の展望
  • Place of Presentation: 国立天文台
• [Presentation] TMT Project (2010)
  • Author(s): 柏川伸成
  • Organizer: 巨大ブラックホールと銀河の共進化
  • Place of Presentation: 筑波大学
• [Presentation] HSCとTMTのシナジー (2010)
  • Author(s): 柏川伸成
  • Organizer: HSC研究会
  • Place of Presentation: 弘前大学
• [Presentation] TMTで探る銀河形成・銀河進化 (2010)
  • Author(s): 柏川伸成
  • Organizer: 日本天文学会
  • Place of Presentation: 広島大学
• [Presentation] TMT観測装置検討の現状 (2009)
  • Author(s): 柏川伸成
  • Organizer: TMT計画技術検討会
  • Place of Presentation: 国立天文台、東京都
  • Year and Date: 2009-06-16
• [Presentation] TMT観測装置検討の現状 (2009)
  • Author(s): 柏川伸成
  • Organizer: TMT計画技術検討会
  • Place of Presentation: 国立天文台
  • Year and Date: 2009-06-16
• [Presentation] HSC high-z QSO survey (2009)
  • Author(s): 柏川伸成
  • Organizer: 超広域サーベイによる巨大ブラックホール進化の研究
  • Place of Presentation: 愛媛大学、愛媛県
• [Presentation] 遠方銀河観測で探る再電離と初代天体 (2009)
  • Author(s): 柏川伸成
  • Organizer: ガンマ線バーストで読み解く太古の宇宙
  • Place of Presentation: 岐阜大学、岐阜県
• [Presentation] TMTからSPICAへの期待 (2009)
  • Author(s): 柏川伸成
  • Organizer: SPICAサイエンスワークショップ
  • Place of Presentation: 東京大学、東京都
• [Presentation] High-z Galaxies at the epoch of reionization (2009)
  • Author(s): N. Kashikawa
  • Organizer: Focus week of the Epoch of the reionization
  • Place of Presentation: PMU, Chiba, Japan
• [Presentation] High-z Galaxies at the epoch of reionization (2009)
  • Author(s): N. Kashikawa
  • Organizer: Reionization with Multi-frequency Datasets
  • Place of Presentation: Stockholm U., Stockholm, Sweden
• [Presentation] High-z Galaxies at the epoch of reionization (2009)
  • Author(s): 柏川伸成
  • Organizer: Reionization with Multi-frequency Datasets
  • Place of Presentation: Stockholm U., Sweden
• [Presentation] High-z Galaxies at the epoch of reionization (2009)
  • Author(s): 柏川伸成
  • Organizer: Focus week of the Epoch of the reionization
  • Place of Presentation: IPMU, Japan
• [Presentation] TMTからSPICAへの期待 (2009)
  • Author(s): 柏川伸成
  • Organizer: SPICAサイエンスワークショップ
  • Place of Presentation: 東京大学
• [Presentation] 遠方銀河観測で探る再電離と初代天体 (2009)
  • Author(s): 柏川伸成
  • Organizer: ガンマ線バーストで読み解く太古の宇宙
  • Place of Presentation: 岐阜
• [Presentation] HSC high-z QSO survey (2009)
  • Author(s): 柏川伸成
  • Organizer: 超広域サーベイによる巨大ブラックホール進化の研究
  • Place of Presentation: 愛媛大学
• [Presentation] Lyα輝線銀河から探る銀河形成と初代天体 (2008)
  • Author(s): 柏川伸成
  • Organizer: 初代天体研究会
  • Place of Presentation: 甲南大学、兵庫県
• [Presentation] 初期宇宙と銀河形成 (2008)
  • Author(s): 柏川伸成
  • Organizer: 銀河形成研究の最前線
  • Place of Presentation: 国立天文台、東京都
• [Presentation] Ly輝線銀河から探る宇宙再電離 (2007)
  • Author(s): 柏川伸成
  • Organizer: 日本天文学会
  • Place of Presentation: 岐阜大学、岐阜県
  • Year and Date: 2007-09-27
• [Presentation] Ly輝線銀河から探る宇宙再電離 (2007)
  • Author(s): 柏川伸成
  • Organizer: 平成19年度日本天文学会秋期年会
  • Place of Presentation: 岐阜大学
  • Year and Date: 2007-09-27
• [Presentation] Lyman Alpha Galaxies from z=5. 7 to 6. 96 with Subaru (2007)
  • Author(s): N. Kashikawa
  • Organizer: American Astronomical Society Meeting 210
  • Place of Presentation: Honolulu, America
  • Year and Date: 2007-05-30
• [Presentation] Lyman Alpha Galaxies from z=5.7 to 6.96 with Subaru (2007)
  • Author(s): N. Kashikawa
  • Organizer: American Astronomical Society Meeting 210
  • Place of Presentation: Hawaii, Honolulu
  • Year and Date: 2007-05-30
• [Presentation] Panoramic view of cosmic frontier with Subaru (2007)
  • Author(s): N. Kashikawa, et. al.
  • Organizer: Panoramic Views of Galaxy Formation and Evolution
  • Place of Presentation: Kanagawa, Japan
• [Presentation] High-z DLAの直接検出 (2007)
  • Author(s): 柏川伸成
  • Organizer: q QSO吸収線研究会
  • Place of Presentation: 強羅静雲荘、神奈川
• [Presentation] Reionzation probed by high-z galaxies with Subaru (2007)
  • Author(s): N. Kashikawa
  • Organizer: Lyman alpha emitters
  • Place of Presentation: IAP, Paris, France
• [Book] Panoramic Views of Galaxy Formation and Evolution ASP Conference Series (2008)
  • Author(s): N. Kashikawa, et. al.
  • Total Pages: 513
  • Publisher: Astronomical Society of the Pacific
• [Book] Panoramic Views of Galaxy Formation and Evolution ASP Conference Series, Vol. 399 (2008)
  • Author(s): N. Kashikawa, et al.
  • Total Pages: 513
  • Publisher: Astronomical Society of the Pacific
• [Book] At the edge of the universe: Latest results from the deepest astronomical surveys (2007)
  • Author(s): N. Kashikawa
  • Publisher: Astronomical Society of the Pacific
• [Book] At the edge of the universe: Latest results from the deepest astronomical surveys (2007)
  • Author(s): N. Kashikawa, 他
  • Publisher: Astronomical Society of the Pacific
• [Remarks] ホームページ等
  • URL: http://optik2.mtk.nao.ac.jp/~kashik/