Microscopic views of cluster galaxy formation

• Project/Area Number: 26800107
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan (2015-2017); Japan Aerospace Exploration Agency (2014)
• Principal Investigator: KOYAMA Yusei 国立天文台, ハワイ観測所, 助教 (40724662)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 光赤外線天文学 / 銀河進化 / 銀河形成 / 銀河団 / 原始銀河団

Outline of Final Research Achievements

The aim of this research is to perform a multi-wavelength, high-resolution study on the internal structures of galaxies in distant cluster environments at the peak epoch of the cosmic star formation history (~10-Gyrs ago). We carried out integral field unit spectroscopy (3-D spectroscopy) as well as sharp imaging observations assisted by adaptive optics with 8m-class telescopes, and unveiled the internal geometry of star-forming activity within young cluster galaxies. We published three refereed papers related to this project during the supported research period.

Research Products

• [Int'l Joint Research] ダラム大学(英国)
• [Int'l Joint Research] マックスプランク地球外物理学研究所(MPE)(ドイツ)
• [Journal Article] Molecular Gas Reservoirs in Cluster Galaxies at z = 1.46 (2018)
  • Author(s): Hayashi Masao、 Tadaki Ken-ichi、 Kodama Tadayuki、 Kohno Kotaro、 Yamaguchi Yuki、 Hatsukade Bunyo、 Koyama Yusei、 Shimakawa Rhythm、 Tamura Yoichi、 Suzuki Tomoko L.
  • Journal Title: The Astrophysical Journal Volume: 856 Issue: 2 Pages: 118-118
  • DOI: 10.3847/1538-4357/aab3e7
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First results on the cluster galaxy population from the Subaru Hyper Suprime-Cam survey. I. The role of group or cluster environment in star formation quenching from z = 0.2 to 1.1 (2017)
  • Author(s): H.-Y. Jian、L. Lini、M. Oguri、A. Nishizawa、M. Takada, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1
  • DOI: 10.1093/pasj/psx096
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The nature of Hα-selected galaxies along the large-scale structure at z=0.4 revealed by Subaru Hyper Suprime-Cam survey (2017)
  • Author(s): Koyama Yusei、Hayashi Masao、Tanaka Masayuki、Kodama Tadayuki、Shimakawa Rhythm、Yamamoto Moegi、Nakata Fumiaki、Tanaka Ichi、Suzuki Tomoko L、Tadaki Ken-ichi、Nishizawa Atsushi J、Yabe Kiyoto、Toba Yoshiki、Lin Lihwai、Jian Hung-Yu、Komiyama Yutaka
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 21-21
  • DOI: 10.1093/pasj/psx078
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A 16 deg^2 survey of emission-line galaxies at z<1.5 in HSC-SSP Public Data Release 1 (2017)
  • Author(s): Hayashi Masao、Tanaka Masayuki、Shimakawa Rhythm、Furusawa Hisanori、Momose Rieko、Koyama Yusei、Silverman John D、Kodama Tadayuki、Komiyama Yutaka、Leauthaud Alexie、Lin Yen-Ting、Miyazaki Satoshi、Nagao Tohru、Nishizawa Atsushi J、Ouchi Masami、Shibuya Takatoshi、Tadaki Ken-ichi、Yabe Kiyoto
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 17-17
  • DOI: 10.1093/pasj/psx088
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] MAHALO Deep Cluster Survey I. Accelerated and enhanced galaxy formation in the densest regions of a protocluster at z=2.5 (2017)
  • Author(s): Shimakawa Rhythm、Kodama Tadayuki、Hayashi Masao、Prochaska J. Xavier、Tanaka Ichi、Cai Zheng、Suzuki Tomoko L.、Tadaki Ken-ichi、Koyama Yusei
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 473 Issue: 2 Pages: 1977-1999
  • DOI: 10.1093/mnras/stx2494
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The implications of the surprising existence of a large, massive CO disk in a distant protocluster (2017)
  • Author(s): Dannerbauer, H.; Lehnert, M. D.; Emonts, B.; Ziegler, B.; Altieri, B.; De Breuck, C.; Hatch, N.; Kodama, T.; Koyama, Y.; Kurk, J. D.; Matiz, T.; Miley, G.; Narayanan, D.; Norris, R. P.; Overzier, R.; Rottgering, H. J. A.; Sargent, M.; Seymour, N.; Tanaka, M.; Valtchanov, I.; Wylezalek, D.
  • Journal Title: Astronomy & Astrophysics Volume: 608 Pages: A48-A48
  • DOI: 10.1051/0004-6361/201730449
  • Peer Reviewed / 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] The Interstellar Medium in [O iii]-selected Star-forming Galaxies at z~3.2 (2017)
  • Author(s): Suzuki Tomoko L.、Kodama Tadayuki、Onodera Masato、Shimakawa Rhythm、Hayashi Masao、Tadaki Ken-ichi、Koyama Yusei、Tanaka Ichi、Sobral David、Smail Ian、Best Philip N.、Khostovan Ali A.、Minowa Yosuke、Yamamoto Moegi
  • Journal Title: The Astrophysical Journal Volume: 849 Issue: 1 Pages: 1-15
  • DOI: 10.3847/1538-4357/aa8df3
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A Universal Correlation between Star Formation Activity and Molecular Gas Properties Across Environments (2017)
  • Author(s): Koyama Shuhei、Koyama Yusei、Yamashita Takuji、Morokuma-Matsui Kana、Matsuhara Hideo、Nakagawa Takao、Hayashi Masao、Kodama Tadayuki、Shimakawa Rhythm、Suzuki Tomoko L.、Tadaki Ken-ichi、Tanaka Ichi、Yamamoto Moegi
  • Journal Title: The Astrophysical Journal Volume: 847 Issue: 2 Pages: 137-137
  • DOI: 10.3847/1538-4357/aa8a6c
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Rotating Starburst Cores in Massive Galaxies at z = 2.5 (2017)
  • Author(s): Tadaki, K.; Kodama, T.; Nelson, E. J.; Belli, S.; Forster Schreiber, N. M.; Genzel, R.; Hayashi, M.; Herrera-Camus, R.; Koyama, Y.; Lang, P.; Lutz, D.; Shimakawa, R.; Tacconi, L. J.; Ubler, H.; Wisnioski, E.; Wuyts, S.; Hatsukade, B.; Lippa, M.; Nakanishi, K.; Ikarashi, S.; Kohno, K.; et al.
  • Journal Title: The Astrophysical Journal Volume: 841 Issue: 2 Pages: L25-L25
  • DOI: 10.3847/2041-8213/aa7338
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Evolutionary Phases of Gas-rich Galaxies in a Galaxy Cluster at z = 1.46 (2017)
  • Author(s): Hayashi, M., Kodama, T., Kohno, K., and 7 co-authors
  • Journal Title: The Astrophysical Journal Letters Volume: 841 Issue: 2 Pages: L21-L21
  • DOI: 10.3847/2041-8213/aa71ad
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Panoramic Mid-Infrared Views of Distant Clusters of Galaxies with Akari (2017)
  • Author(s): Yusei Koyama
  • Journal Title: Publications of The Korean Astronomical Society Volume: 32 Issue: 1 Pages: 287-291
  • DOI: 10.5303/pkas.2017.32.1.287
• [Journal Article] Far-infrared properties of infrared bright dust-obscured galaxies selected with IRAS and AKARI far-infrared all-sky survey (2017)
  • Author(s): Yoshiki Toba; Tohru Nagao; Wei-Hao Wang; Hideo Matsuhara; Masayuki Akiyama; Tomotsugu Goto; Yusei Koyama; Youich Ohyama; Issei Yamamura
  • Journal Title: The Astrophysical Journal Volume: 印刷中
  • Peer Reviewed / Int'l Joint Research
• [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] 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] Environmental impacts on dust temperature of star-forming galaxies in the local Universe (2017)
  • Author(s): Yasuhiro Matsuki, Yusei Koyama, Takao Nakagawa, Satoshi Takita
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 466(3) Issue: 3 Pages: 2517-2528
  • DOI: 10.1093/mnras/stw2929
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Bulge-forming Galaxies with an Extended Rotating Disk at z ~ 2 (2017)
  • Author(s): Tadaki, K., Genzel, R., Kodama, T., et al. (24 more authors)
  • Journal Title: ApJ Volume: 834 Issue: 2 Pages: 135-144
  • DOI: 10.3847/1538-4357/834/2/135
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Enhanced Star Formation of Less Massive Galaxies in a Protocluster at z = 2.5 (2016)
  • Author(s): Hayashi, M., Kodama, T., Tanaka, I., Shimakawa, R.,Koyama, Y., Tadaki, K., Suzuki, T. L., Yamamoto, M.
  • Journal Title: ApJ Letter Volume: 826 Issue: 2 Pages: 28-32
  • DOI: 10.3847/2041-8205/826/2/l28
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] [O III] emission line as a tracer of star-forming galaxies at high redshifts: comparison between Hα and [O III] emitters at z=2.23 in HiZELS (2016)
  • Author(s): Suzuki, T. L., Kodama, T., Sobral, D., Khostovan, A. A., Hayashi, M., Shimakawa, R., Koyama, Y., Tadaki, K.-i., Tanaka, I., Minowa, Y., Yamamoto, M., Smail, I., Best, P. N.
  • Journal Title: MNRAS Volume: 462 Issue: 1 Pages: 181-189
  • DOI: 10.1093/mnras/stw1655
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The spatially resolved dynamics of dusty starburst galaxies in a z~0.4 cluster: beginning the transition from spirals to S0s (2016)
  • Author(s): Johnson, H. L.; Harrison, C. M.; Swinbank, A. M.; Bower, R. G.; Smail, I.; Koyama, Y.; Geach, J. E.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 460 Issue: 1 Pages: 1059-1076
  • DOI: 10.1093/mnras/stw1030
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Panoramic Mid-infrared Views of Distant Clusters of Galaxies with AKARI (2016)
  • Author(s): Yusei Koyama
  • Journal Title: Publications of the Korean Astronomical Society Volume: 未定
• [Journal Article] The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713: the environment matters (2016)
  • Author(s): David Sobral, Andra Stroe, Yusei Koyama, Behnam Darvish, Joao Calhau, Ana Afonso, Tadayuki Kodama, Fumiaki Nakata
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 458 Issue: 4 Pages: 3443-3454
  • DOI: 10.1093/mnras/stw534
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Predicting dust extinction properties of star-forming galaxies from Hα/UV ratio (2015)
  • Author(s): Yusei Koyama, Tadayuki Kodama, Masao Hayashi, Rhythm Shimakawa, Issei Yamamura, Fumi Egusa, Nagisa Oi, Ichi Tanaka, Ken-ichi Tadaki, Satoshi Takita, Sin'itirou Makiuti
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 453 Issue: 1 Pages: 879-892
  • DOI: 10.1093/mnras/stv1599
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] SXDF-ALMA 1.5 arcmin2 Deep Survey: A Compact Dusty Star-forming Galaxy at z = 2.5 (2015)
  • Author(s): Tadaki, Ken-ichi; Kohno, Kotaro; Kodama, Tadayuki; Ikarashi, Soh; Aretxaga, Itziar; Berta, Stefano; Caputi, Karina I.; Dunlop, James S.; Hatsukade, Bunyo; Hayashi, Masao; Hughes, David H.; Ivison, Rob; Izumi, Takuma; Koyama, Yusei; Lutz, Dieter; Makiya, Ryu; Matsuda, Yuichi; Nakanishi, Kouichiro; Rujopakarn, Wiphu, et
  • Journal Title: The Astrophysical Journal Letters Volume: Volume 811, Issue 1 Issue: 1 Pages: 3-8
  • DOI: 10.1088/2041-8205/811/1/l3
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Environmental dependence of polycyclic aromatic hydrocarbon emission at z~0.8. Investigation by observing the RX J0152.7-1357 with AKARI (2015)
  • Author(s): Kazumi Murata, Yusei Koyama, Masayuki Tanaka, Hideo Matsuhara, Tadayuki Kodama
  • Journal Title: Astronomy & Astrophysics Volume: 581 Pages: 114-120
  • DOI: 10.1051/0004-6361/201526276
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Correlation between star formation activity and electron density of ionized gas at z=2.5 (2015)
  • Author(s): Rhythm Shimakawa, Tadayuki Kodama, Charles C. Steidel, Ken-ichi Tadaki, Ichi Tanaka, Allison L. Strom, Masao Hayashi, Yusei Koyama, Tomoko Suzuki, Moegi Yamamoto
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 451 Issue: 2 Pages: 1284-1289
  • DOI: 10.1093/mnras/stv915
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Galaxy formation at z>3 revealed by narrow-band selected [OIII] emission line galaxies (2015)
  • Author(s): Tomoko Suzuki, Tadayuki Kodama, Ken-ichi Tadaki, Masao Hayashi, Yusei Koyama, Ichi Tanaka, Yosuke Minowa, Rhythm Shimakawa, Moegi Yamamoto
  • Journal Title: The Astrophysical Journal Volume: 806 Issue: 2 Pages: 208-217
  • DOI: 10.1088/0004-637x/806/2/208
  • Peer Reviewed
• [Journal Article] Large-scale environment of z~5.7 CIV absorption systems II: Spectroscopy of Lyman alpha emitters (2015)
  • Author(s): Gonzalo C. Diaz, Emma V. Ryan-Weber, Jeff Cooke, Yusei Koyama, Masami Ouchi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 448 Issue: 2 Pages: 1240-1270
  • DOI: 10.1093/mnras/stu2738
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] An early phase of environmental effects on galaxy properties unveiled by near-infrared spectroscopy of protocluster galaxies at z > 2 (2015)
  • Author(s): R. Shimakawa, T. Kodama, K. Tadaki, M. Hayashi, Y. Koyama, I. Tanaka
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 448 Issue: 1 Pages: 666-680
  • DOI: 10.1093/mnras/stv051
  • Peer Reviewed / Open Access
• [Journal Article] Discovery of Nine Extended Ionized Gas Clouds in a z = 0.4 Cluster (2015)
  • Author(s): Yagi, Masafumi; Gu, Liyi; Koyama, Yusei; Nakata, Fumiaki; Kodama, Tadayuki; Hattori, Takashi; Yoshida, Michitoshi
  • Journal Title: The Astronomical Journal Volume: 149 Issue: 2 Pages: 36-47
  • DOI: 10.1088/0004-6256/149/2/36
  • Peer Reviewed / Open Access
• [Journal Article] Environmental dependence of galaxy formation explored by near-infrared spectroscopy of two protoclusters at z>2 (2015)
  • Author(s): Rhythm Shimakawa, Tadayuki Kodama, Ken-ichi Tadaki, Masao Hayashi, Yusei Koyama, Ichi Tanaka
  • Journal Title: Proceedings of the International Astronomical Union, IAU Symposium Volume: 309 Issue: S309 Pages: 345-345
  • DOI: 10.1017/s1743921314010370
• [Journal Article] The Environmental Impacts on the Star Formation Main Sequence: An Halpha Study of the Newly Discovered Rich Cluster at z = 1.52 (2014)
  • Author(s): Y. Koyama, T. Kodama, K. Tadaki, M. Hayashi, I. Tanaka, R. Shimakawa
  • Journal Title: Astrophysical Journal Volume: 789 Issue: 1 Pages: 18-32
  • DOI: 10.1088/0004-637x/789/1/18
  • Peer Reviewed / Open Access
• [Journal Article] An excess of dusty starbursts related to the Spiderweb galaxy (2014)
  • Author(s): Dannerbauer, H., Kurk, J. D., De Breuck, C., Wylezalek, D., Santos, J. S., Koyama, Y., Seymour, N., Tanaka, M., Hatch, N., Altieri, B., Coia, D., Galametz, A., Kodama, T., Miley, G., Rottgering, H., Sanchez-Portal, M., Valtchanov, I., Venemans, B., Ziegler, B.
  • Journal Title: Astronomy & Astrophysics Volume: 570 Pages: 55-73
  • DOI: 10.1051/0004-6361/201423771
  • Peer Reviewed / Open Access
• [Journal Article] Large-scale environment of z~5.7 CIV absorption systems I: projected distribution of galaxies (2014)
  • Author(s): Gonzalo C. Diaz, Yusei Koyama, Emma V. Ryan-Weber, Jeff Cooke, Masami Ouchi, Kazuhiro Shimasaku, Nakata, Fumiaki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 442 Issue: 2 Pages: 946-978
  • DOI: 10.1093/mnras/stu914
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Galaxy population properties of the massive X-ray luminous galaxy cluster XDCP J0044.0-2033 at z=1.58: red-sequence formation, massive galaxy assembly, and central star formation activity (2014)
  • Author(s): R. Fassbender, A. Nastasi, J. S. Santos, C. Lidman, M. Verdugo, Y. Koyama, P. Rosati, D. Pierini, N. Padilla, A. D. Romeo, N. Menci, A. Bongiorno, M. Castellano, P. Cerulo, A. Fontana, A. Galametz, A. Grazian, A. Lamastra, L. Pentericci, V. Sommariva, V. Strazzullo, R. Suhada, P. Tozzi
  • Journal Title: Astronomy & Astrophysics Volume: 568 Pages: 5-27
  • DOI: 10.1051/0004-6361/201423941
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Identification of the progenitors of rich clusters and member galaxies in rapid formation at z > 2 (2014)
  • Author(s): R. Shimakawa, T. Kodama, K. Tadaki, I. Tanaka, M. Hayashi, Y. Koyama
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 441 Issue: 1 Pages: 1-5
  • DOI: 10.1093/mnrasl/slu029
  • Peer Reviewed / Open Access
• [Journal Article] Evidence for a Gas-rich Major Merger in a Proto-cluster at z = 2.5 (2014)
  • Author(s): K. Tadaki, T. Kodama, Y. Tamura, M. Hayashi, Y. Koyama, R. Shimakawa, I. Tanaka, K. Kohno, B. Hatsukade, K. Suzuki
  • Journal Title: Astrophysical Journal Volume: 788 Issue: 2 Pages: 23-27
  • DOI: 10.1088/2041-8205/788/2/l23
  • Peer Reviewed / Open Access
• [Journal Article] Mapping the large scale structure around a z=1.46 galaxy clu ster in 3-D using two adjacent narrow-band filters (2014)
  • Author(s): M. Hayashi, et al.
  • Journal Title: The Monthly Notices of the Royal Astronomical Society Volume: 439 Issue: 3 Pages: 2571-2583
  • DOI: 10.1093/mnras/stu115
  • Peer Reviewed / Open Access
• [Journal Article] Mapping and resolving galaxy formation at its peak epoch with Mahalo-Subaru and Gracias-ALMA (2014)
  • Author(s): Kodama, Tadayuki; Hayashi, Masao; Koyama, Yusei; Tadaki, Ken-Ichi; Tanaka, Ichi; Shimakawa, Rhythm; Suzuki, Tomoko; Yamamoto, Moegi
  • Journal Title: Galaxies in 3D across the Universe, Proceedings of the International Astronomical Union, IAU Symposium Volume: 309 Issue: S309 Pages: 255-258
  • DOI: 10.1017/s1743921314009818
• [Presentation] An overview of galaxy cluster/ environment science with Subaru (2017)
  • Author(s): Yusei Koyama
  • Organizer: Subaru international partnership science & instrumentation workshop
  • Place of Presentation: National Astronomical Observatory of Japan, Mitaka, Tokyo, Japan
  • Year and Date: 2017-03-22
  • Int'l Joint Research / Invited
• [Presentation] Panoramic and Microscopic Views of Cluster Galaxy Formation Near and Far (2017)
  • Author(s): Yusei Koyama
  • Organizer: Sharp Views of Galaxy Formation and Evolution Japan-German (JSPS-DAAD) Workshop
  • Int'l Joint Research / Invited
• [Presentation] The Nature and Environment of (Dusty) Star-Forming Galaxies Near and Far Revealed by AKARI (2017)
  • Author(s): Yusei Koyama
  • Organizer: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life
  • Int'l Joint Research
• [Presentation] The nature of Hα selected galaxies along the huge cosmic web across cosmic time with Subaru (2017)
  • Author(s): Yusei Koyama
  • Organizer: Early Stages of Galaxy Cluster Formation (GCF) 2017: Mergers, Proto-clusters, and Star Formation in Overdense Environment
  • Int'l Joint Research
• [Presentation] The nature of Hα-selected galaxies along the huge cosmic web at z=0.4 revealed by HSC-SSP survey (2017)
  • Author(s): 小山佑世
  • Organizer: 第４回銀河進化研究会
• [Presentation] Unveiling the environmental effects on internal star/gas/dust properties in galaxies across cosmic time (2016)
  • Author(s): Yusei Koyama
  • Organizer: ALMA-WS "Extensive CO survey of nearby galaxies"
  • Place of Presentation: National Astronomical Observatory of Japan, Mitaka, Tokyo, Japan
  • Year and Date: 2016-12-07
  • Int'l Joint Research / Invited
• [Presentation] From panoramic to microscopic: probing the nature of cluster galaxy population across cosmic time with Subaru (2016)
  • Author(s): Yusei Koyama
  • Organizer: Panoramas of the Evolving Cosmos [6th Subaru international conference]
  • Place of Presentation: International Conference Center Hiroshima, Hiroshima, Japan
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] Environmental Impacts on the Molecular Gas & Dust Content in Galaxies across Cosmic Time (2016)
  • Author(s): 小山佑世
  • Organizer: 近傍銀河の分子ガスの大規模撮像観測が拓く星間物質と星生成の研究に関する新展開
  • Place of Presentation: 国立天文台(東京都三鷹市)
  • Year and Date: 2016-11-17
  • Invited
• [Presentation] Environmental Impacts on Various Galaxy Properties across Cosmic Time (2016)
  • Author(s): Yusei Koyama
  • Organizer: In Situ View of Galaxt Formation
  • Place of Presentation: Ringberg Castle, Bavaria, Germany
  • Year and Date: 2016-10-30
  • Int'l Joint Research / Invited
• [Presentation] From MAHALO-Subaru to the New World: Environmental impacts on various properties of galaxies across cosmic time (2016)
  • Author(s): Yusei Koyama
  • Organizer: High redshift (proto-)clusters : anecdotal or important phase? Paris 2016 Workshop
  • Place of Presentation: Observatoire de Paris, Paris, France
  • Year and Date: 2016-10-05
  • Int'l Joint Research / Invited
• [Presentation] 銀河団銀河の面分光観測で解き明かす銀河進化と環境効果 (2016)
  • Author(s): 小山佑世
  • Organizer: 面分光研究会2016 ~面分光で解き明かす銀河の形成と進化~
  • Place of Presentation: 国立天文台(東京都三鷹市)
  • Year and Date: 2016-09-06
• [Presentation] 『あかり』データを用いた銀河進化研究のこれから (2016)
  • Author(s): 小山佑世
  • Organizer: 星・銀河形成の研究に新しい視点を加える「あかり」サイエンスWS
  • Place of Presentation: 国立天文台(東京都三鷹市)
  • Invited
• [Presentation] Galaxy anatomy with Subaru: our new challenge beyond MAHALO-Subaru (2015)
  • Author(s): Yusei Koyama
  • Organizer: MPE IR Group Retreat
  • Place of Presentation: Ringberg Castle, Bavaria, Germany
  • Year and Date: 2015-12-09
  • Int'l Joint Research / Invited
• [Presentation] A systematic study of the geometry of stars and dust within distant star- forming galaxies with PFS (2015)
  • Author(s): Yusei Koyama
  • Organizer: PFS-SSP galaxy survey workshop
  • Place of Presentation: IPMU, Kashiwa, Chiba, Japan
  • Year and Date: 2015-11-13
  • Int'l Joint Research
• [Presentation] SWIMS-18 Narrow-band & Medium-band Survey Near and Far (2015)
  • Author(s): 小山佑世
  • Organizer: TAO/SWIMS Science Workshop 2015
  • Place of Presentation: 東京大学天文学教育センター (東京都)
  • Year and Date: 2015-09-17
• [Presentation] Can we predict dust extinction of star-forming galaxies from Hα/UV ratio? (2015)
  • Author(s): 小山佑世
  • Organizer: 第二回銀河進化研究会
  • Place of Presentation: 名古屋大学 (愛知県)
  • Year and Date: 2015-06-03
• [Presentation] Predicting dust extinction properties of star-forming galaxies from Hα/UV ratio (2015)
  • Author(s): 小山佑世
  • Organizer: 系外銀河ISM研究会
  • Place of Presentation: 国立天文台三鷹キャンパス (東京都)
  • Year and Date: 2015-05-11
• [Presentation] Can we predict dust extinction of galaxies from Hα/UV ratio? (2015)
  • Author(s): 小山佑世
  • Organizer: 日本天文学会2015年春季年会
  • Place of Presentation: 大阪大学
  • Year and Date: 2015-03-18 – 2015-03-21
• [Presentation] MAHALO-Subaru 2014: from panoramic to microscopic views of galaxy evolution (2015)
  • Author(s): 小山佑世
  • Organizer: すばるユーザーズミーティング2014
  • Place of Presentation: 国立天文台三鷹
  • Year and Date: 2015-01-13 – 2015-01-15
• [Presentation] 赤外線天文衛星『あかり』付加価値データ作成の進捗状況 (2015)
  • Author(s): 小山佑世
  • Organizer: 第15回宇宙科学シンポジウム
  • Place of Presentation: JAXA宇宙科学研究所
  • Year and Date: 2015-01-06 – 2015-01-07
• [Presentation] Galaxy evolution in growing clusters: panoramic observations of distant (proto-)clusters with Subaru (2014)
  • Author(s): Yusei Koyama
  • Organizer: China-Subaru Workshop
  • Place of Presentation: SHAO, Shanghai, China
  • Year and Date: 2014-11-29 – 2014-12-01
  • Invited
• [Presentation] The environmental impacts on the star formation main sequence out to z~2 (2014)
  • Author(s): Yusei Koyama
  • Organizer: Evolving galaxies in Evolving environment
  • Place of Presentation: Bologna, Italy
  • Year and Date: 2014-09-15 – 2014-09-19
• [Presentation] マクロとミクロな視点で解き明かす銀河進化と環境効果 (2014)
  • Author(s): 小山佑世
  • Organizer: 2014年度天文天体物理若手の会夏の学校
  • Place of Presentation: 長野県戸倉上山田温泉
  • Year and Date: 2014-07-28 – 2014-07-31
  • Invited
• [Presentation] Microscopic views of galaxy formation and environmental effects with ULTIMATE-Subaru (2014)
  • Author(s): 小山佑世
  • Organizer: GLAO Science Workshop 2014
  • Place of Presentation: 国立天文台三鷹
  • Year and Date: 2014-07-28 – 2014-07-29
• [Presentation] Panoramic mid-infrared views of distant clusters of galaxies with AKARI (2014)
  • Author(s): Yusei Koyama
  • Organizer: THE UNIVERSE IN THE LIGHT OF AKARI and Synergy with future Large Space Telescopes
  • Place of Presentation: Oxford, U.K.
  • Year and Date: 2014-07-09 – 2014-07-11
• [Presentation] Star Formation Main Sequence and Beyond: tracking down the environ-mental impacts on the SFR-M* relation out to z~2 (2014)
  • Author(s): 小山佑世
  • Organizer: 第1回銀河進化研究会
  • Place of Presentation: 国立天文台三鷹
  • Year and Date: 2014-06-04 – 2014-06-06
• [Remarks] 研究代表者のウェブサイト
  • URL: https://www.naoj.org/staff/koyama/homepage/index.html
• [Remarks] 研究代表者のウェブサイト
  • URL: http://www.naoj.org/staff/koyama/homepage/index.html
• [Remarks] 研究代表者のウェブサイト
  • URL: http://koala.ir.isas.jaxa.jp/~koyamays/homepage/index.html