Multi-wavelength study of evolution of galaxy clusters, thermodynamics of intracluster medium, and origin of diffuse radio emission

• Project/Area Number: 15K17610
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: UEDA Shutaro 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 宇宙航空プロジェクト研究員 (40748258)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 銀河団 / X線天文学 / X線天文衛星ひとみ / 多波長観測 / 銀河団ガス / 銀河団の観測的研究

Outline of Final Research Achievements

This research focused on merging galaxy clusters to understand the evolution of large-scale structure through multi-wavelength observations done by X-ray, optical, and radio. In this research, we found a 100-kpc-scale gas motion in the well-known dynamically relaxed galaxy clusters. This indicates that the mass growth continuously takes plane even though galaxy cluster seems to be relaxed. We furthermore succeeded in measuring a velocity field of the intracluster medium in the entire core of the X-ray brightest cluster, the Perseus cluster, using Hitomi X-ray Observatory for the first time. In addition, we analyzed the data taken by Chandra, Atacama Large Millimeter/submillimeter Array (ALMA), and Hubble Space Telescope for the well-known merging clusters and revealed the thermodynamical properties of intracluster medium and geometry of mergers.

Research Products

• [Journal Article] In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H) (2018)
  • Author(s): Nakajima Hiroshi, Bamba Aya et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 21-21
  • DOI: 10.1093/pasj/psx116
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Soft X-ray Imager aboard Hitomi (ASTRO-H) (2018)
  • Author(s): Tanaka Takaaki、Uchida Hiroyuki、Nakajima Hiroshi、Tsunemi Hiroshi、Hayashida Kiyoshi、Tsuru Takeshi Go、Dotani Tadayasu
  • Journal Title: Journal of Astronomical Telescopes, Instruments, and Systems Volume: 4 Issue: 01 Pages: 1-1
  • DOI: 10.1117/1.jatis.4.1.011211
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi (ASTRO-H) X-ray Astronomy Satellite (2018)
  • Author(s): Tadayuki Takahashi, Yuto Ichinohe (73/270) et al.
  • Journal Title: Journal of Astronomical Telescopes, Instruments, and Systems Volume: 4 Issue: 02 Pages: 021402-021402
  • DOI: 10.1117/1.jatis.4.2.021402
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Temperature structure in the Perseus cluster core observed with Hitomi (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 11-11
  • DOI: 10.1093/pasj/psy004
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi* (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 12-12
  • DOI: 10.1093/pasj/psx156
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi observations of the LMC SNR N 132D: Highly redshifted X-ray emission from iron ejecta (2018)
  • Author(s): Hitomi collaboration, A. Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 16-16
  • DOI: 10.1093/pasj/psx151
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Glimpse of the highly obscured HMXB IGR J16318-4848 with Hitomi (2018)
  • Author(s): Hitomi Collaboration, A. Bamba et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 17-17
  • DOI: 10.1093/pasj/psx154
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi observation of radio galaxy NGC1275: The first X-ray microcalorimeter spectroscopy of Fe-Kα line emission from an active galactic nucleus (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 13-13
  • DOI: 10.1093/pasj/psx147
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurements of resonant scattering in the Perseus Cluster core with Hitomi SXS (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 10-10
  • DOI: 10.1093/pasj/psx127
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi X-ray studies of giant radio pulses from the Crab pulsar (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 15-15
  • DOI: 10.1093/pasj/psx083
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Search for thermal X-ray features from the Crab nebula with the Hitomi soft X-ray spectrometer (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 14-14
  • DOI: 10.1093/pasj/psx072
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multiwavelength study of X-ray luminous clusters in the Hyper Suprime-Cam Subaru Strategic Program S16A field (2018)
  • Author(s): Miyaoka et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: SP1 Pages: 1-20
  • DOI: 10.1093/pasj/psx132
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hitomi X-ray observation of the pulsar wind nebula G21.5-0.9 (2018)
  • Author(s): Hitomi Collaboration、Aharonian Felix、...、Kohmura Takayoshi...、et al (他191名）
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 3 Pages: 1-16
  • DOI: 10.1093/pasj/psy027
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Atmospheric gas dynamics in the Perseus cluster observed with Hitomi (2018)
  • Author(s): Hitomi Collaboration, Aya Bamba, et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 2 Pages: 9-9
  • DOI: 10.1093/pasj/psx138
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Solar abundance ratios of the iron-peak elements in the Perseus cluster (2017)
  • Author(s): Aharonian, F., Bamba, A. et al.
  • Journal Title: Nature Volume: 551 Issue: 7681 Pages: 478-480
  • DOI: 10.1038/nature24301
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Embedded Spiral Patterns in the Cool Core of the Massive Cluster of Galaxies Abell 1835 (2017)
  • Author(s): Ueda, Shutaro; Kitayama, Tetsu; Dotani, Tadayasu
  • Journal Title: The Astrophysical Journal Volume: 837 Issue: 1 Pages: 34-43
  • DOI: 10.3847/1538-4357/aa5c3e
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Hitomi Constraints on the 3.5 keV Line in the Perseus Galaxy Cluster (2016)
  • Author(s): Aharonian, F. A., Akamatsu, H, Terada, Y. et al (Hitomi collaboration)
  • Journal Title: The Astrophysical Journal Letters Volume: 837 Issue: 1 Pages: 15-23
  • DOI: 10.3847/2041-8213/aa61fa
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The Sunyaev-Zel'dovich effect at 5″: RX J1347.5-1145 imaged by ALMA (2016)
  • Author(s): T. Kitayama, S. Ueda, S. Takakuwa, T. Tsutsumi, E. Komatsu, T. Akahori, D. Iono, T. Izumi, R. Kawabe, K. Kohno, H. Matsuo, N. Ota, Y. Suto, M. Takizawa, K. Yoshikawa
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: 5 Pages: 88-106
  • DOI: 10.1093/pasj/psw082
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The quiescent intracluster medium in the core of the Perseus cluster (2016)
  • Author(s): Hitomi Collaboration et al.
  • Journal Title: Nature Volume: 535 Issue: 7610 Pages: 117-121
  • DOI: 10.1038/nature18627
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Search for a non-equilibrium plasma in the merging galaxy cluster Abell 754 (2016)
  • Author(s): Inoue, Shota; Hayashida, Kiyoshi; Ueda, Shutaro; Nagino, Ryo; Tsunemi, Hiroshi; Koyama, Katsuji
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 00 Issue: SP1 Pages: 1-11
  • DOI: 10.1093/pasj/psw027
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Modeling the spectral response for the soft X-ray imager onboard the ASTRO-H satellite (2016)
  • Author(s): Shota Inoue, Kiyoshi Hayashida, Shuhei Katada, Hiroshi Nakajima, Ryo Nagino, Naohisa Anabuki, Hiroshi Tsunemi, and Shutaro Ueda, et al.
  • Journal Title: Nuclear Instruments and Methods in Physics Research Section A Volume: 00 Pages: 1-5
  • DOI: 10.1016/j.nima.2016.03.071
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] The Soft X-ray Imager (SXI) for the ASTRO-H Mission (2015)
  • Author(s): Takaaki Tanaka, Hiroshi Nakajima et al.
  • Journal Title: Proc. SPIE Volume: 9601 Pages: 10-10
  • DOI: 10.1117/12.2190808
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Coexistence of excess hot gas and a sloshing cool core in RXJ 1347.5-1145 (2018)
  • Author(s): Shutaro Ueda
  • Organizer: SnowCluster 2018
  • Int'l Joint Research
• [Presentation] Atmospheric gas dynamics in the Perseus cluster observed with Hitomi (2018)
  • Author(s): Shutaro Ueda
  • Organizer: 高エネルギー宇宙物理連絡会
  • Invited
• [Presentation] A1835銀河団のクールコア中に埋もれていた渦巻構造の発見 (2017)
  • Author(s): 上田周太朗、北山哲、堂谷忠靖
  • Organizer: 日本天文学会
  • Place of Presentation: 九州大学
  • Year and Date: 2017-03-15
• [Presentation] 「ひとみ」によるペルセウス座銀河団のガス速度測定: (2) 輝線の非ガウス性とイオン温度への制限 (2017)
  • Author(s): 上田周太朗、飯塚亮、一戸悠人、井上翔太、太田直美、北山哲、佐藤浩介、田中桂悟、田村隆幸、辻本匡弘、藤本龍一、前田良知、および「ひとみ」コラボレーション
  • Organizer: 日本天文学会
  • Place of Presentation: 九州大学
  • Year and Date: 2017-03-15
• [Presentation] Embedded spiral patterns in the massive galaxy cluster Abell 1835 (2017)
  • Author(s): Shutaro Ueda
  • Organizer: The X-ray Universe 2017
  • Int'l Joint Research
• [Presentation] A1835銀河団のクールコア中に埋もれていた渦巻構造の発見 (2017)
  • Author(s): 上田 周太朗
  • Organizer: 日本天文学会
• [Presentation] 「ひとみ」によるペルセウス座銀河団の高温ガスの速度場の測定 (2017)
  • Author(s): 上田 周太朗
  • Organizer: 日本天文学会
• [Presentation] X線観測から探る銀河団中心銀河とその超巨大質量ブラックホールの進化 (2015)
  • Author(s): 上田周太朗、田村隆幸、堂谷忠靖
  • Organizer: 日本 SKA サイエンス会議「宇宙磁場」 2015
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2015-09-17
  • Invited
• [Presentation] Luminous Supermassive Black Holes in the Brightest Cluster Galaxies (2015)
  • Author(s): Shutaro Ueda
  • Organizer: ISAS Astrophysics Colloquia
  • Place of Presentation: 宇宙科学研究所
  • Year and Date: 2015-08-06
  • Int'l Joint Research / Invited
• [Remarks] ASTRO-H 次期X線国際天文衛星
  • URL: http://astro-h.isas.jaxa.jp/