Study of early black hole foramtion and cosmic reionization using high-z quasars

• Project/Area Number: 15H03645
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: The University of Tokyo (2018); National Astronomical Observatory of Japan (2015-2017)
• Principal Investigator: Kashikawa Nobunari 東京大学, 大学院理学系研究科(理学部), 教授 (00290883)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000); Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2017: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2016: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 初期宇宙 / ブラックホール / 宇宙再電離 / 銀河形成 / 銀河共進化 / 銀河進化

Outline of Final Research Achievements

This study aimed to I) discover high-z quasars at z>7, and II) construct a statistical sample of z~6 quasars at z~6, by using both a great light-gathering power and a wide-field imaging capability of Subaru telescope. In this study, we found 89 quasars, which is 100 times fainter than the previous sample, at z~6, increasing significantly the number of quasars at this epoch. Based on the sample, we measured the luminosity function, estimate the photon budget to the reionization, and discovery of a z~7 quasar. We also measure the dynamical mass and black hole mass by the following radio and near-infrared observations, and published the papers on the coevolution with galaxies, and the initial evolution of black holes.

Academic Significance and Societal Importance of the Research Achievements

巨大ブラックホールの誕生過程は謎に包まれており、宇宙初期にどの程度普遍的に存在するのか、そしてその個数密度はどれくらいか、といった基本的な事も分かっていなかった。これまでの探査では、現在の宇宙では珍しいような、最重量級の巨大ブラックホールに限られていた。本研究では、最新鋭の超広視野主焦点カメラHSCを用いた300夜に渡る大規模な探査観測を通じて、83個の超遠方クェーサーを新発見することに成功した。これらは従来知られていたクェーサーのわずか数パーセント程度の明るさで、今回初めてその微弱な光をとらえ、普通の重さの巨大ブラックホールが超遠方宇宙にも多数存在することを初めて明らかにした。

Research Products

• [Int'l Joint Research] ブラジル国立天文台(ブラジル)
• [Int'l Joint Research] プリンストン大学/カルフォルニア大学(米国)
• [Int'l Joint Research] プリンストン大学/カルフォルニア大学(米国)
• [Int'l Joint Research] ブラジル国立天文台(ブラジル)
• [Int'l Joint Research] ブラジル国立天文台(ブラジル)
• [Int'l Joint Research] プリンストン大学/ジョンホプキンス大学/カルフォルニア大学(米国)
• [Int'l Joint Research] ASIAA(台湾)
• [Int'l Joint Research] プリンストン大学(米国)
• [Int'l Joint Research] ASIAA(台湾)
• [Int'l Joint Research] ブラジル国立天文台(ブラジル)
• [Journal Article] CHORUS. II. Subaru/HSC Determination of the Lyα Luminosity Function at z = 7.0: Constraints on Cosmic Reionization Model Parameter (2019)
  • Author(s): Itoh, R., et al.
  • Journal Title: The Astrophysical Journal Volume: 867 Issue: 1 Pages: 46-46
  • DOI: 10.3847/1538-4357/aadfe4
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Suppression of Low-mass Galaxy Formation around Quasars at z~2-3 (2019)
  • Author(s): Uchiyama Hisakazu、Kashikawa Nobunari、Overzier Roderik、Toshikawa Jun、Onoue Masafusa、Ishikawa Shogo、Kubo Mariko、Ito Kei、Namiki Shigeru、Liang Yongming
  • Journal Title: The Astrophysical Journal Volume: 870 Issue: 1 Pages: 45-45
  • DOI: 10.3847/1538-4357/aaef7b
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Direct Measurement of Quasar Outflow Wind Acceleration (2019)
  • Author(s): Toru Misawa, Michael Eracleous, Jane C. Charlton, Nobunari Kashikawa
  • Journal Title: The Astrophysical Journal Volume: 870 Issue: 2 Pages: 68-68
  • DOI: 10.3847/1538-4357/aaf0fe
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Discovery of the First Low-luminosity Quasar at z > 7 (2019)
  • Author(s): Matsuoka Yoshiki、Onoue Masafusa、Kashikawa Nobunari、Strauss Michael A、Iwasawa Kazushi、Lee Chien-Hsiu、Imanishi Masatoshi、et al.
  • Journal Title: The Astrophysical Journal Volume: 872 Issue: 1 Pages: 2-2
  • DOI: 10.3847/2041-8213/ab0216
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Enhancement of HI absorption associated with the z = 3.1 large-scale proto-cluster and characteristic structures with AGNs sculptured over Gpc scale in the SSA22 field (2019)
  • Author(s): Hayashino T、Inoue A K、Kousai K、Kashikawa N、Mawatari K、Matsuda Y、Tejos N、Prochaska J X、Iwata I、Noll S、Burgarella D、Yamada T、Akiyama M
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 484 Pages: 5868-5868
  • DOI: 10.1093/mnras/stz388
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Large-scale Environment of a z = 6.61 Luminous Quasar Probed by Lyα Emitters and Lyman Break Galaxies (2018)
  • Author(s): Ota Kazuaki、Venemans Bram P.、Taniguchi Yoshiaki、Kashikawa Nobunari、Nakata Fumiaki、Harikane Yuichi、Banados Eduardo、Overzier Roderik、Riechers Dominik A.、Walter Fabian、Toshikawa Jun、Shibuya Takatoshi、Jiang Linhua
  • Journal Title: The Astrophysical Journal Volume: 856 Issue: 2 Pages: 109-109
  • DOI: 10.3847/1538-4357/aab35b
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). III. Star formation properties of the host galaxies at z > 6 studied with ALMA (2018)
  • Author(s): Izumi Takuma、Onoue Masafusa、Shirakata Hikari、Nagao Tohru、Kohno Kotaro、Matsuoka Yoshiki、Imanishi Masatoshi、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 3 Pages: 36-36
  • DOI: 10.1093/pasj/psy026
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). IV. Discovery of 41 Quasars and Luminous Galaxies at 5.7 < z < 6.9 (2018)
  • Author(s): Matsuoka Yoshiki、Iwasawa Kazushi、Onoue Masafusa、Kashikawa Nobunari、Strauss Michael A.、Lee Chien-Hsiu、Imanishi Masatoshi、et al.
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 237 Issue: 1 Pages: 5-5
  • DOI: 10.3847/1538-4365/aac724
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). V. Quasar Luminosity Function and Contribution to Cosmic Reionization at z = 6 (2018)
  • Author(s): Matsuoka Yoshiki、Strauss Michael A.、Kashikawa Nobunari、Onoue Masafusa、Iwasawa Kazushi、Tang Ji-Jia、Lee Chien-Hsiu、Imanishi Masatoshi、et al.
  • Journal Title: The Astrophysical Journal Volume: 869 Issue: 2 Pages: 150-150
  • DOI: 10.3847/1538-4357/aaee7a
  • NAID: 120006707417
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Great Optically Luminous Dropout Research Using Subaru HSC (GOLDRUSH). I. UV luminosity functions at z ~ 4-7 derived with the half-million dropouts on the 100 deg2 sky (2018)
  • Author(s): Ono, Y., Shimasaku, K. et al. (26 authors in total)
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-29
  • DOI: 10.1093/pasj/psx103
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Enhancement of galaxy overdensity around quasar pairs at z < 3.6 based on the Hyper Suprime-Cam Subaru Strategic Program Survey (2018)
  • Author(s): Onoue Masafusa、Kashikawa Nobunari、Uchiyama Hisakazu、Akiyama Masayuki、Harikane Yuichi、Imanishi Masatoshi、Komiyama Yutaka、Matsuoka Yoshiki、Nagao Tohru、Nishizawa Atsushi J、Oguri Masamune、Ouchi Masami、Tanaka Masayuki、Toba Yoshiki、Toshikawa Jun
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 31-52
  • DOI: 10.1093/pasj/psx092
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Luminous quasars do not live in the most overdense regions of galaxies at z ~ 4 (2018)
  • Author(s): Uchiyama Hisakazu、Toshikawa Jun、Kashikawa Nobunari、Overzier Roderik、Chiang Yi-Kuan、Marinello Murilo、Tanaka Masayuki、Niino Yuu、Ishikawa Shogo、Onoue Masafusa、Ichikawa Kohei、Akiyama Masayuki、Coupon Jean、Harikane Yuichi、Imanishi Masatoshi、Kodama Tadayuki、Komiyama Yutaka、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 32-46
  • DOI: 10.1093/pasj/psx112
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Clustering of quasars in a wide luminosity range at redshift 4 with Subaru Hyper Suprime-Cam wide field imaging (2018)
  • Author(s): Wanqiu HE, Masayuki AKIYAMA, James BOSCH, Motohiro ENOKI, Yuichi HARIKANE, Hiroyuki IKEDA, Nobunari KASHIKAWA, Toshihiro KAWAGUCHI, 他20名
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 33-52
  • DOI: 10.1093/pasj/psx129
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The quasar luminosity function at redshift 4 with the Hyper Suprime-Cam Wide Survey (2018)
  • Author(s): Akiyama Masayuki、He Wanqiu、Ikeda Hiroyuki、Niida Mana、Nagao Tohru、Bosch James、Coupon Jean、Enoki Motohiro、Imanishi Masatoshi、Kashikawa Nobunari、Kawaguchi Toshihiro、Komiyama Yutaka、Lee Chien-Hsiu、Matsuoka Yoshiki、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 34-57
  • DOI: 10.1093/pasj/psx091
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 quasars and luminous galaxies at 5.7 < z < 6.8 (2018)
  • Author(s): Matsuoka Yoshiki、Onoue Masafusa、Kashikawa Nobunari、Iwasawa Kazushi、Strauss Michael A、Nagao Tohru、Imanishi Masatoshi、Lee Chien-Hsiu、Akiyama Masayuki、Asami Naoko、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-23
  • DOI: 10.1093/pasj/psx046
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A search for Lyα emitters around a concentrated region of strong Lyα absorbers at z = 2.3 (2017)
  • Author(s): Ogura Kazuyuki、Nagao Tohru、Imanishi Masatoshi、Kashikawa Nobunari、Taniguchi Yoshiaki、Kajisawa Masaru、Kobayashi Masakazu A. R.、Toba Yoshiki、Nobuhara Kodai
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 3 Pages: 51-66
  • DOI: 10.1093/pasj/psx027
  • Peer Reviewed
• [Journal Article] A New Constraint on Reionization from the Evolution of the Lyα Luminosity Function at z~6-7 Probed by a Deep Census of z = 7.0 Lyα Emitter Candidates to 0.3L (2017)
  • Author(s): Ota, Kazuaki; Iye, Masanori; Kashikawa, Nobunari; Konno, Akira; Nakata, Fumiaki; Totani, Tomonori; Kobayashi, Masakazu A. R.; Fudamoto, Yoshinobu; Seko, Akifumi; Toshikawa, Jun; Ichikawa, Akie; Shibuya, Takatoshi; Onoue, Masafusa
  • Journal Title: The Astrophysical Journal Volume: 844 Issue: 1 Pages: 85-122
  • DOI: 10.3847/1538-4357/aa7a0a
  • Peer Reviewed
• [Journal Article] Minor Contribution of Quasars to Ionizing Photon Budget at z ~ 6: Update on Quasar Luminosity Function at the Faint End with Subaru/Suprime-Cam (2017)
  • Author(s): Onoue Masafusa、Kashikawa Nobunari、Willott Chris J.、Hibon Pascale、Im Myungshin、Furusawa Hisanori、Harikane Yuichi、Imanishi Masatoshi、Ishikawa Shogo、Kikuta Satoshi、Matsuoka Yoshiki、Nagao Tohru、Niino Yuu、Ono Yoshiaki、Ouchi Masami、Tanaka Masayuki、Tang Ji-Jia、Toshikawa Jun、Uchiyama Hisakazu
  • Journal Title: The Astrophysical Journal Letters Volume: 847 Issue: 2 Pages: 15-21
  • DOI: 10.3847/2041-8213/aa8cc6
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Very Compact Millimeter Sizes for Composite Star-forming/AGN Submillimeter Galaxies (2017)
  • Author(s): Ikarashi S., Caputi K. I, Ohta K., 他20名
  • Journal Title: The Astrophysical Journal Volume: 849 Issue: 2 Pages: 36-44
  • DOI: 10.3847/2041-8213/aa9572
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Lyman-break Galaxies at z ~ 3 in the Subaru Deep Field: Luminosity Function, Clustering, and [O III] Emission (2017)
  • Author(s): Malkan, M. A., Shimasaku, K. et al. (9 authors in total)
  • Journal Title: The Astrophysical Journal Volume: 850 Issue: 1 Pages: 5-5
  • DOI: 10.3847/1538-4357/aa9331
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Resolving the Internal Structure of Circumgalactic Medium Using Gravitationally Lensed Quasars (2017)
  • Author(s): Koyamada, S., Misawa, T., Inada, N., Oguri, M., Kashikawa, N. & Okoshi, K.
  • Journal Title: The Astrophysical Journal Volume: 851 Issue: 2 Pages: 88100-88100
  • DOI: 10.3847/1538-4357/aa9a3a
  • Peer Reviewed
• [Journal Article] GOLDRUSH. III. A systematic search for protoclusters at z~4 based on the >100 deg2 area (2017)
  • Author(s): Toshikawa Jun、Uchiyama Hisakazu、Kashikawa Nobunari、Ouchi Masami、Overzier Roderik、Ono Yoshiaki、Harikane Yuichi、Ishikawa Shogo、Kodama Tadayuki、Matsuda Yuichi、Lin Yen-Ting、Onoue Masafusa、Tanaka Masayuki、Nagao Tohru、Akiyama Masayuki、Komiyama Yutaka、Goto Tomotsugu、Lee Chien-Hsiu
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-11
  • DOI: 10.1093/pasj/psx102
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] SILVERRUSH. II. First catalogs and properties of ~2000 Lyα emitters and blobs at z~6-7 identified over the 14-21 deg2 sky (2017)
  • Author(s): Shibuya Takatoshi、Ouchi Masami、Konno Akira、Higuchi Ryo、Harikane Yuichi、Ono Yoshiaki、Shimasaku Kazuhiro、Taniguchi Yoshiaki、Kobayashi Masakazu A R、Kajisawa Masaru、Nagao Tohru、Furusawa Hisanori、Goto Tomotsugu、Kashikawa Nobunari、Komiyama Yutaka、Kusakabe Haruka、Lee Chien-Hsiu、Momose Rieko、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-20
  • DOI: 10.1093/pasj/psx122
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] SILVERRUSH. III. Deep optical and near-infrared spectroscopy for Lyα and UV-nebular lines of bright Lyα emitters at z=6-7 (2017)
  • Author(s): Shibuya Takatoshi、Ouchi Masami、Harikane Yuichi、Rauch Michael、Ono Yoshiaki、Mukae Shiro、Higuchi Ryo、Kojima Takashi、Yuma Suraphong、Lee Chien-Hsiu、Furusawa Hisanori、Konno Akira、Martin Crystal L、Shimasaku Kazuhiro、Taniguchi Yoshiaki、Kobayashi Masakazu A R、Kajisawa Masaru、Nagao Tohru、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-23
  • DOI: 10.1093/pasj/psx107
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] SILVERRUSH. IV. Lyα luminosity functions at z=5.7 and 6.6 studied with ~1300 Lyα emitters on the 14-21 deg2 sky (2017)
  • Author(s): Konno Akira、Ouchi Masami、Shibuya Takatoshi、Ono Yoshiaki、Shimasaku Kazuhiro、Taniguchi Yoshiaki、Nagao Tohru、Kobayashi Masakazu A R、Kajisawa Masaru、Kashikawa Nobunari、Inoue Akio K、Oguri Masamune、Furusawa Hisanori、Goto Tomotsugu、Harikane Yuichi、Higuchi Ryo、Komiyama Yutaka、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-21
  • DOI: 10.1093/pasj/psx131
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The redshift-selected sample of long gamma-ray burst host galaxies: The overall metallicity distribution at z < 0.4 (2017)
  • Author(s): Niino, Yuu; Aoki, Kentaro; Hashimoto, Tetsuya; Hattori, Takashi; Ishikawa, Shogo; Kashikawa, Nobunari; Kosugi, George; Onoue, Masafusa; Toshikawa, Jun; Yabe, Kiyoto
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 2 Pages: 27-37
  • DOI: 10.1093/pasj/psw133
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Discovery of an Enormous Lyα Nebula in a Massive Galaxy Overdensity at z = 2.3 (2017)
  • Author(s): Cai, Zheng; Fan, Xiaohui; Yang, Yujin; Bian, Fuyan; Prochaska, J. Xavier; Zabludoff, Ann; McGreer, Ian; Zheng, Zhen-Ya; Green, Richard; Cantalupo, Sebastiano; Frye, Brenda; Hamden, Erika; Jiang, Linhua; Kashikawa, Nobunari; Wang, Ran
  • Journal Title: The Astrophysical Journal Volume: 837 Issue: 1 Pages: 71-81
  • DOI: 10.3847/1538-4357/aa5d14
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Similarities and uniqueness of Ly α emitters among star-forming galaxies at z = 2.5 (2017)
  • Author(s): Shimakawa, Rhythm; Kodama, Tadayuki; Shibuya, Takatoshi; Kashikawa, Nobunari; Tanaka, Ichi; Matsuda, Yuichi; Tadaki, Ken-ichi; Koyama, Yusei; Hayashi, Masao; Suzuki, Tomoko L.; Yamamoto, Moegi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 468 Pages: 1123-1141
  • DOI: 10.1093/mnras/stx091
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Direct evidence for Lyboldsymbol{alpha } depletion in the protocluster core (2017)
  • Author(s): Shimakawa, Rhythm; Kodama, Tadayuki; Hayashi, Masao; Tanaka, Ichi; Matsuda, Yuichi; Kashikawa, Nobunari; Shibuya, Takatoshi; Tadaki, Ken-ichi; Koyama, Yusei; Suzuki, Tomoko L.; Yamamoto, Moegi
  • Journal Title: Monthly Notices of the Royal Astronomical Society: Letters Volume: 468 Issue: 1 Pages: 21-25
  • DOI: 10.1093/mnrasl/slx019
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] A New Constraint on the Lyα Fraction of UV Very Bright Galaxies at Redshift 7 (2016)
  • Author(s): Furusawa, H., 他１７名（１４番目）
  • Journal Title: The Astrophysical Journal Volume: 822 Issue: 1 Pages: 46-58
  • DOI: 10.3847/0004-637x/822/1/46
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Detection of an oxygen emission line from a high-redshift galaxy in the reionization epoch (2016)
  • Author(s): Inoue, Akio K.; Tamura, Yoichi; Matsuo, Hiroshi; Mawatari, Ken; Shimizu, Ikkoh; Shibuya, Takatoshi; Ota, Kazuaki; Yoshida, Naoki; Zackrisson, Erik; Kashikawa, Nobunari; Kohno, Kotaro; Umehata, Hideki; Hatsukade, Bunyo; Iye, Masanori; Matsuda, Yuichi; Okamoto, Takashi; Yamaguchi, Yuki
  • Journal Title: Science Volume: 325 Issue: 6293 Pages: 1559-1562
  • DOI: 10.1126/science.aaf0714
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Detection of emission lines from z~3 DLAs towards the QSO J2358+0149 (2016)
  • Author(s): Srianand, Raghunathan; Hussain, Tanvir; Noterdaeme, Pasquier; Petitjean, Patrick; Kruhler, Thomas; Japelj, Jure; Paris, Isabelle; Kashikawa, Nobunari
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 460 Issue: 1 Pages: 634-649
  • DOI: 10.1093/mnras/stw951
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A Systematic Survey of Protoclusters at z ~ 3-6 in the CFHTLS Deep Fields (2016)
  • Author(s): Toshikawa, Jun; Kashikawa, Nobunari; Overzier, Roderik; Malkan, Matthew A.; Furusawa, Hisanori; Ishikawa, Shogo; Onoue, Masafusa; Ota, Kazuaki; Tanaka, Masayuki; Niino, Yuu; Uchiyama, Hisakazu
  • Journal Title: The Astrophysical Journal Volume: 826 Issue: 2 Pages: 114-138
  • DOI: 10.3847/0004-637x/826/2/114
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Conceptual design of wide-field focal plane with InGaAs image sensors (2016)
  • Author(s): Yutaka Komiyama, Hidehiko Nakaya, Nobunari Kashikawa, Tomohisa Uchida
  • Journal Title: Proceedings of the SPIE Volume: 9908 Pages: 99085-99092
  • DOI: 10.1117/12.2231569
  • Acknowledgement Compliant
• [Journal Article] Low temperature performance of a commercially available InGaAs image sensor (2016)
  • Author(s): Hidehiko Nakaya, Yutaka Komiyama, Nobunari Kashikawa, Tomohisa Uchida, Takahiro Nagayama, Michitoshi Yoshida
  • Journal Title: Proceedings of the SPIE Volume: 9915 Pages: 99151-99158
  • DOI: 10.1117/12.2231169
  • Acknowledgement Compliant
• [Journal Article] Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). I. Discovery of 15 Quasars and Bright Galaxies at 5.7 < z < 6.9 (2016)
  • Author(s): Y. Matsuoka et al. (including M. Takada, the 35th in 39 co-authors)
  • Journal Title: The Astrophysical Journal Volume: 828 Issue: 1 Pages: 26-39
  • DOI: 10.3847/0004-637x/828/1/26
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Metal Abundances across Cosmic Time (MACT) Survey. I. Optical Spectroscopy in the Subaru Deep Field (2016)
  • Author(s): Ly, Chun; Malhotra, Sangeeta; Malkan, Matthew A.; Rigby, Jane R.; Kashikawa, Nobunari; de los Reyes, Mithi A.; Rhoads, James E.
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 226 Issue: 1 Pages: 5-63
  • DOI: 10.3847/0067-0049/226/1/5
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Physical Properties of Spectroscopically Confirmed Galaxies at z~6. III. Stellar Populations from SED Modeling with Secure Lyα Emission and Redshifts (2016)
  • Author(s): Jiang, Linhua; Finlator, Kristian; Cohen, Seth H.; Egami, Eiichi; Windhorst, Rogier A.; Fan, Xiaohui; Dave, Romeel; Kashikawa, Nobunari; Mechtley, Matthew; Ouchi, Masami; Shimasaku, Kazuhiro; Clement, Benjamin
  • Journal Title: The Astrophysical Journal Volume: 816 Issue: 1 Pages: 16-33
  • DOI: 10.3847/0004-637x/816/1/16
  • Peer Reviewed
• [Journal Article] Giant Hα Nebula Surrounding the Starburst Merger NGC 6240 (2016)
  • Author(s): Yoshida, Michitoshi; Yagi, Masafumi; Ohyama, Youichi; Komiyama, Yutaka; Kashikawa, Nobunari; Tanaka, Hisashi; Okamura, Sadanori
  • Journal Title: The Astrophysical Journal Volume: 820 Issue: 1 Pages: 48-63
  • DOI: 10.3847/0004-637x/820/1/48
  • Peer Reviewed
• [Journal Article] The very wide-field gzK Galaxy Survey - II. The relationship between star-forming galaxies at z~2 and their host haloes based upon HOD modelling (2016)
  • Author(s): Ishikawa, Shogo; Kashikawa, Nobunari; Hamana, Takashi; Toshikawa, Jun; Onoue, Masafusa
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 458 Issue: 1 Pages: 747-758
  • DOI: 10.1093/mnras/stw271
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] The Quasar-LBG Two-point Angular Cross-correlation Function at z~4 in the COSMOS Field (2015)
  • Author(s): Ikeda, H., et al.
  • Journal Title: ApJ Volume: 809 Issue: 2 Pages: 138-151
  • DOI: 10.1088/0004-637x/809/2/138
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Physical conditions of the interstellar medium in star-forming galaxies at z~1.5 (2015)
  • Author(s): Hayashi, Masao; Ly, Chun; Shimasaku, Kazuhiro; Motohara, Kentaro; Malkan, Matthew A.; Nagao, Tohru; Kashikawa, Nobunari; Goto, Ryosuke; Naito, Yoshiaki
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Issue: 5 Pages: 80-101
  • DOI: 10.1093/pasj/psv041
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The very wide-field gzK galaxy survey - I. Details of the clustering properties of star-forming galaxies at z~2 (2015)
  • Author(s): Ishikawa, Shogo; Kashikawa, Nobunari; Toshikawa, Jun; Onoue, Masafusa
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 454 Issue: 1 Pages: 205-217
  • DOI: 10.1093/mnras/stv1927
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Thirty Meter Telescope Detailed Science Case: 2015 (2015)
  • Author(s): Skidmore, Warren; TMT International Science Development Teams; Science Advisory Committee, TMT (including Norio Narita) (総著者数143名)
  • Journal Title: Research in Astronomy and Astrophysics Volume: 15 Issue: 12 Pages: 1945-2140
  • DOI: 10.1088/1674-4527/15/12/001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] A systematic search for protoclusters based on Subaru/HSC survey (2019)
  • Author(s): Jun Toshikawa
  • Organizer: Panchromatic Panoramic Studies of Galaxy Clusters: from HSC to PFS and ULTIMATE
  • Int'l Joint Research / Invited
• [Presentation] The brightest UV-selected galaxies in protoclusters at z~4: Ancestors of Brightest Cluster Galaxies? (2019)
  • Author(s): Kei Ito
  • Organizer: Panchromatic Panoramic Studies of Galaxy Clusters: from HSC to PFS and ULTIMATE
  • Int'l Joint Research
• [Presentation] 赤方偏移４から５における原始銀河団とその周囲の大規模構造 (2019)
  • Author(s): 利川潤
  • Organizer: 日本天文学会2019年春季年会
• [Presentation] HSC広視野撮像観測によるz~4におけるproto-Brightest Cluster Galaxy探査 (2019)
  • Author(s): 伊藤慧
  • Organizer: 日本天文学会2019年春季年会
• [Presentation] Search for massive LAE overdensities traced by IGM to study their coorelation at z~2.2 (2019)
  • Author(s): Liang, Yongming
  • Organizer: 日本天文学会2019年春季年会
• [Presentation] 宇宙再電離期における暗いクェーサー周囲の電離状況 (2019)
  • Author(s): 石本梨花子
  • Organizer: 日本天文学会2019年春季年会
• [Presentation] クェーサー紫外放射による銀河周辺物質への影響 (2018)
  • Author(s): 内山久和
  • Organizer: 日本天文学会2018年秋季年会
• [Presentation] High-z protocluster survey by Subaru/HSC (2018)
  • Author(s): Nobunari Kashikawa
  • Organizer: Chile-Japan Academic Forum 2018
  • Int'l Joint Research / Invited
• [Presentation] Wide survey for early universe by Subaru/HSC (2017)
  • Author(s): Nobunari Kashikawa
  • Organizer: Dawn of galaxies 2017
  • Place of Presentation: Obergurgl(オーストリア)
  • Year and Date: 2017-01-14
  • Int'l Joint Research / Invited
• [Presentation] High-Z Protocluster Survey by Subaru/HSC (2017)
  • Author(s): Kashikawa, Nobunari
  • Organizer: Early stages of Galaxy Cluster Formation (GCF) 2017: Mergers, Protoclusters, and Star Formation in Overdense Environments
  • Int'l Joint Research
• [Presentation] The Redshift Selected Sample of Long Gamma-Ray Busrt Host Galaxies: The Complete Metallicity Measurements at z < 0.41 (2016)
  • Author(s): Niino, Y.; Aoki, K.; Hashimoto, T.; Hattori, T.; Ishikawa, S.; Kashikawa, N.; Kosugi, G.; Onoue, M.; Toshikawa, J.; Yabe, K.
  • Organizer: Eighth Huntsville Gamma-Ray Burst Symposium
  • Place of Presentation: Huntsville(アメリカ)
  • Year and Date: 2016-10-24
  • Int'l Joint Research
• [Presentation] 系外サイエンスのまとめ (2016)
  • Author(s): 柏川伸成
  • Organizer: 光赤外線天文学連合会シンポジウム
  • Place of Presentation: 国立天文台（東京都）
  • Year and Date: 2016-02-09
  • Invited
• [Presentation] High-z session summary (2015)
  • Author(s): Nobunari Kashikawa
  • Organizer: HSC-SSP AGN workshop
  • Place of Presentation: 鹿児島大学（鹿児島）
  • Year and Date: 2015-12-01
  • Int'l Joint Research / Invited
• [Presentation] IGM/CGM probed by PFS (2015)
  • Author(s): Nobunari Kashikawa
  • Organizer: PFS-SSP galaxy survey workshop
  • Place of Presentation: IPMU(千葉県)
  • Year and Date: 2015-11-13
  • Int'l Joint Research / Invited
• [Presentation] Subaru wide-field imaging × Keck spectroscopy (2015)
  • Author(s): Nobunari Kashikawa
  • Organizer: Subaru-Keck synergy workshop
  • Place of Presentation: 東北大学（宮城県）
  • Year and Date: 2015-09-01
  • Int'l Joint Research / Invited
• [Presentation] TMT (2015)
  • Author(s): 柏川伸成
  • Organizer: 天文・天体物理 夏の学校
  • Place of Presentation: ホテル圓山荘（長野県）
  • Year and Date: 2015-07-27
  • Invited
• [Presentation] PFSへの期待 (2015)
  • Author(s): 柏川伸成
  • Organizer: PFS ワークショップ
  • Place of Presentation: 国立天文台（東京都）
  • Year and Date: 2015-07-09
  • Invited
• [Remarks] 超遠方宇宙に大量の巨大ブラックホールを発見 すばる望遠鏡の最新鋭カメラで稀少天体を発見
  • URL: https://www.u-tokyo.ac.jp/focus/ja/articles/z0508_00112.html
• [Remarks] 超遠方宇宙に大量の巨大ブラックホールを発見
  • URL: https://www.s.u-tokyo.ac.jp/ja/info/6291/
• [Remarks] 研究室の扉「初期の宇宙に大量のブラックホールがあった」
  • URL: https://youtu.be/3EjFB4kAJFw
• [Remarks] 宇宙は原始銀河団であふれている
  • URL: https://www.subarutelescope.org/Pressrelease/2018/03/04/j_index.html
• [Funded Workshop] protocluster workshop (2016)
  • Place of Presentation: 国立天文台 三鷹
  • Year and Date: 2016-04-18