Study of nonthermal phenomena of galaxy clusters through next generation multiwave obserbations and theoretical simulations

• Project/Area Number: 26400218
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Yamagata University
• Principal Investigator: Takizawa Motokazu 山形大学, 理学部, 准教授 (70323160)
• Co-Investigator(Renkei-kenkyūsha): NAKAZAWA Kazuhiro 名古屋大学, 理学研究科, 准教授 (50342621) ; KITAYAMA Tetsu 東邦大学, 理学部, 教授 (00339201)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 銀河団 / X線天文学 / 電波天文学 / 衝撃波 / 粒子加速 / SZ効果 / Ｘ線天文学 / 乱流 / 磁場 / 重力レンズ

Outline of Final Research Achievements

We investigated the particle acceleration processes and physical status of the galaxy cluster radio relics through X-ray and radio observations, and constructed a theoretical model for them.In particular,we showed that the particle acceleration processes in the "toothbrush" radio relic cannot be explained by a simple diffusive shock acceleration model.We conducted SZ observations by ALMA with a spatial resolution of 5 arcsec, which is the highest ever, and found that the very high temperature component is located in the significantly different position from the X-ray peak. We contributed the PASJ invited review paper about the cosmic magnetism in low frequency radio astronomy as a coauther.

Research Products

• [Int'l Joint Research] SRON/ライデン大学/アムステルダム大学(オランダ)
• [Int'l Joint Research] UNIST(韓国)
• [Int'l Joint Research] ハーバード大学/カーネギーメロン大学/プリンストン大学(米国)
• [Int'l Joint Research] ボン大学(ドイツ)
• [Int'l Joint Research] Academia Sinica(台湾)
• [Int'l Joint Research]
• [Int'l Joint Research] SRON/Leiden University/University of Amsterdam(オランダ)
• [Int'l Joint Research] Harvard-Smithonian CFA/NRAO(米国)
• [Int'l Joint Research] Academia Scinica/National Taiwan University(Taiwan)
• [Int'l Joint Research] MPA/Bon University(Germany)
• [Int'l Joint Research] SRON(オランダ)
• [Int'l Joint Research] Harvard-Smithsonian CFA(米国)
• [Int'l Joint Research] Academia Sinica/National Taiwan University(Taiwan)
• [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] ATCA 16 cm Observation of CIZA J1358.9-4750: Implication of Merger Stage and Constraint on Non-Thermal Properties (2018)
  • Author(s): Takuya Akahori, Yuichi Kato, Kazuhiro Nakazawa, Takeaki Ozawa, Liyi Gu, Motokazu Takizawa, Yutaka Fujita, Hiroyuki Nakanishi, Nobuhiro Okabe, Kazuo Makishima
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 印刷中
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Suzaku observations of the merging galaxy cluster Abell2255: The northeast radio relic (2017)
  • Author(s): H. Akamatsu, M. Mizuno, N. Ota, Y.-Y. Zhang, R. J. van Weeren, H. Kawahara, Y. Fukazawa, J. S. Kaastra, M. Kawaharada, K. Nakazawa, T. Ohashi, H.J.A. Rottgering, M. Takizawa, J. Vink, F. Zandanel
  • Journal Title: Astronomy and Astrophysics Volume: 600 Pages: 100-100
  • DOI: 10.1051/0004-6361/201628400
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Suzaku and Chandra observations of the galaxy cluster RXC J1053.7+5453 with a radio relic (2017)
  • Author(s): Itahana Madoka、Takizawa Motokazu、Akamatsu Hiroki、van Weeren Reinout J.、Kawahara Hajime、Fukazawa Yasushi、Kaastra Jelle S.、Nakazawa Kazuhiro、Ohashi Takaya、Ota Naomi、Roettgering Huub J. A.、Vink Jacco、Zandanel Fabio
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 6 Pages: 88-88
  • DOI: 10.1093/pasj/psx095
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Suzaku observations of the outskirts of the galaxy cluster Abell 3395, including a filament toward Abell 3391 (2017)
  • Author(s): Sugawara Yuuki、Takizawa Motokazu、Itahana Madoka、Akamatsu Hiroki、Fujita Yutaka、Ohashi Takaya、Ishisaki Yoshitaka
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 69 Issue: 6 Pages: 93-93
  • DOI: 10.1093/pasj/psx104
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Cosmic magnetism in centimeter- and meter-wavelength radio astronomy (2017)
  • Author(s): Akahori Takuya、Nakanishi Hiroyuki、Sofue Yoshiaki、Fujita Yutaka、Ichiki Kiyotomo、Ideguchi Shinsuke、Kameya Osamu、Kudoh Takahiro、Kudoh Yuki、Machida Mami、Miyashita Yoshimitsu、Ohno Hiroshi、Ozawa Takeaki、Takahashi Keitaro、Takizawa Motokazu、Yamazaki Dai G
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 1 Pages: 1-44
  • DOI: 10.1093/pasj/psx123
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Suzaku observation of a high entropy cluster Abell 548W (2016)
  • Author(s): K. Nakazawa, Y. Kato, L. Gu, M. Kawaharada, M. Takizawa, Y. Fujita, & K. Makishima
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 68 Issue: SP1 Pages: 21-21
  • DOI: 10.1093/pasj/psv129
  • Peer Reviewed / 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] Central Mass Profiles of the Nearby Cool-core Galaxy Clusters Hydra A and A478 (2016)
  • Author(s): N. Okabe, K. Umetsu, T. Tamura, Y. Fujita, M. Takizawa, K. Matsushita, Y. Fukazawa, T. Futamase, M. Kawaharada, S. Miyazaki, Y. Mochizuki, K. Nakazawa, T. Ohashi, N. Ota, T. Sasaki, K. Sato, & S. I. Tam
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 456 Issue: 4 Pages: 4475-4487
  • DOI: 10.1093/mnras/stv2916
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Discovery of a nearby early-phase major cluster merger CIZA J1358.9-4750 (2015)
  • Author(s): Y. Kato, K. Nakazawa, L. Gu, T. Akahori, M. Takizawa, Y. Fujita & K. Makishima
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Issue: 4 Pages: 71-71
  • DOI: 10.1093/pasj/psv029
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] JVLA S- and X-band polarimetry of the merging cluster Abell 2256 (2015)
  • Author(s): Takeaki Ozawa, Hiroyuki Nakanishi, Takuya Akahori, Kenta Anraku, Motokazu Takizawa, Ikumi Takahashi, Sachiko Onodera, Yuya Tsuda, Yoshiaki Sofue
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Issue: 6 Pages: 110-110
  • DOI: 10.1093/pasj/psv082
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Suzaku observations of the galaxy cluster 1RXS J0603.3+4214: Implications of particle acceleration processes in the "Toothbrush" radio relic (2015)
  • Author(s): Madoka Itahana, Motokazu Takizawa, Hiroki Akamatsu, Takaya Ohashi, Yoshitaka Ishisaki, Hajime Kawahara, Reinout J. van Weeren
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67 Issue: 6 Pages: 113-113
  • DOI: 10.1093/pasj/psv084
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Turbulent Cosmic Ray Reacceleration at Radio Relics and Halos in Clusters of Galaxies (2015)
  • Author(s): Y. Fujita, M. Takizawa, R. Yamazaki, H. Akamatsu, & H. Ohno
  • Journal Title: The Astrophysical Journal, Volume Volume: 815 Issue: 2 Pages: 116-116
  • DOI: 10.1088/0004-637x/815/2/116
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Discovery of a Nearby Early-Phase Major Cluster Merger CIZA J1358.9-4750 (2015)
  • Author(s): Yuichi Kato, Kazuhiro Nakazawa, Liyi Gu, Takuya Akahori, Motokazu Takizawa, Yutaka Fujita, and Kazuo Makishima
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 67
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Universal profiles of the intracluster medium from Suzaku X-ray and Subaru weak-lensing observations (2014)
  • Author(s): N. Okabe, K. Uetsu, T. Tamura, Y. Fujita, M. Takizawa, Y.-Y. Zhang, K. Matsushita, T. Hamana, Y. Fukazawa, Yasushi, T. Futamase, M. Kawaharada, S. Miyazaki, Y. Mochizuki, K. Nakazawa, T. Ohashi, N. Ota, T. Sasaki, K. Sato, S. Tam
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 66 Issue: 5 Pages: 99-99
  • DOI: 10.1093/pasj/psu075
  • Peer Reviewed / Open Access
• [Presentation] Abell 3395 と Abell 3391 の連結領域の X 線観測 (2017)
  • Author(s): 滝沢元和
  • Organizer: 日本天文学会秋季年会
• [Presentation] 多波長観測から迫る銀河団 RXC J1053.7+5453 の衝突過程と粒子加速 (2017)
  • Author(s): 板花まどか
  • Organizer: 日本天文学会秋季年会
• [Presentation] Physical Status of Intracluster Medium Investigated through Radio and X-ray Observations (2017)
  • Author(s): 滝沢元和
  • Organizer: DTA workshop 2017
  • Invited
• [Presentation] Physical Status of the Intracluster Medium Investigated through Radio and X-ray Observations (2017)
  • Author(s): 滝沢元和
  • Organizer: 嶺重さん還暦祝い嶺重グループOBOG研究会
  • Invited
• [Presentation] ALMAによるスニヤエフ・ゼルドビッチ効果の初観測 (2017)
  • Author(s): 北山哲
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 九州大学（福岡県福岡市）
• [Presentation] すざく衛星によるTriangulum Australis 銀河団の超高温領域と非熱的X線放射の探査 (2017)
  • Author(s): 鷹箸颯太
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 九州大学（福岡県福岡市）
• [Presentation] 衝突銀河団CIZA J1358.9-4750領域の広がった電波放射の探査 (2017)
  • Author(s): 赤堀卓也
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 九州大学（福岡県福岡市）
• [Presentation] 衝突銀河団CIZA J1358.9-4750における2つの衝撃波の観測的研究 (2016)
  • Author(s): 加藤佑一
  • Organizer: 日本天文学会2016年春期年会
  • Place of Presentation: 首都大学東京南大沢キャンパス
  • Year and Date: 2016-03-14
• [Presentation] 銀河団の電波レリックの起源としての乱流加速 (2016)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会2016年春期年会
  • Place of Presentation: 首都大学東京南大沢キャンパス
  • Year and Date: 2016-03-14
• [Presentation] すざく衛星によるRXC J1053.7+5453の電波レリック周辺領域の解析 (2016)
  • Author(s): 板花まどか
  • Organizer: 日本天文学会2016年春期年会
  • Place of Presentation: 首都大学東京南大沢キャンパス
  • Year and Date: 2016-03-14
• [Presentation] Abell 3391 と Abell 3395 を含む大規模構造フィラメントの X 線観測 (2016)
  • Author(s): 菅原悠宇紀
  • Organizer: 日本天文学会2016年春期年会
  • Place of Presentation: 首都大学東京南大沢キャンパス
  • Year and Date: 2016-03-14
• [Presentation] 電波銀河NGC6166の偏波観測による冷却コア銀河団A2199の磁場推定 (2016)
  • Author(s): 高橋律裕
  • Organizer: 日本天文学会2016年春期年会
  • Place of Presentation: 首都大学東京南大沢キャンパス
  • Year and Date: 2016-03-14
• [Presentation] Exploring the Intracluster Magnetic Fields through Radio and X-ray Observations (2016)
  • Author(s): Motokazu Takizawa
  • Organizer: Hot spots in the XMM sky: Cosmology from X-ray to Radio
  • Place of Presentation: Mykonos (Greece)
  • Int'l Joint Research
• [Presentation] 低周波電波とX線観測で探る銀河団磁場 (2016)
  • Author(s): 滝沢元和
  • Organizer: 日本SKA合同サイエンス会議「宇宙磁場：銀河系内現象から大規模構造へ」
  • Place of Presentation: ルーセントタカミヤ（山形県山形市）
• [Presentation] すざく衛星による銀河団RXC J1053.7+5453の温度測定 (2016)
  • Author(s): 板花まどか
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 愛媛大学（愛媛県松山市）
• [Presentation] すざくによるTriangulum Australis銀河団の広帯域X線観測 (2016)
  • Author(s): 鷹箸颯太
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 愛媛大学（愛媛県松山市）
• [Presentation] Suzaku Observations of the Galaxy Cluster 1RXS J0603.3+4214 (2016)
  • Author(s): Madoka Itahana
  • Organizer: Hot spots in the XMM sky: Cosmology from X-ray to Radio
  • Place of Presentation: Mykonos (Greece)
  • Int'l Joint Research
• [Presentation] 流体シミュレーションデータを用いた衝突銀河団の衝撃波測定 (2016)
  • Author(s): 庄司優
  • Organizer: 日本SKA合同サイエンス会議「宇宙磁場：銀河系内現象から大規模構造へ」
  • Place of Presentation: ルーセントタカミヤ（山形県山形市）
• [Presentation] 偏波解析で探る銀河団の磁場構造 (2016)
  • Author(s): 小澤武揚
  • Organizer: 日本SKA合同サイエンス会議「宇宙磁場：銀河系内現象から大規模構造へ」
  • Place of Presentation: ルーセントタカミヤ（山形県山形市）
• [Presentation] 銀河団・電波レリック周辺領域の多波長観測 (2016)
  • Author(s): 板花まどか
  • Organizer: 日本SKA合同サイエンス会議「宇宙磁場：銀河系内現象から大規模構造へ」
  • Place of Presentation: ルーセントタカミヤ（山形県山形市）
• [Presentation] 南の三角座銀河団におけるICMの超高温領域と電波ハローに起因する硬X線放射の探査 (2016)
  • Author(s): 鷹箸颯太
  • Organizer: 日本SKA合同サイエンス会議「宇宙磁場：銀河系内現象から大規模構造へ」
  • Place of Presentation: ルーセントタカミヤ（山形県山形市）
• [Presentation] 電波銀河NGC3862の偏波解析による銀河団Abell1367の磁場推定 (2015)
  • Author(s): 滝沢元和
  • 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
• [Presentation] JVLA多周波偏波観測による銀河団の磁場構造と増幅過程推定 (2015)
  • Author(s): 小澤武揚
  • 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
• [Presentation] Abell 3391 と Abell 3395 の連結領域の高温ガスの性質 (2015)
  • Author(s): 菅原悠宇紀
  • Organizer: 日本天文学会2015年秋期年会
  • Place of Presentation: 甲南大学岡本キャンパス
  • Year and Date: 2015-09-09
• [Presentation] 偏波解消・ファラデートモグラフィーを用いた衝突銀河団Abell 2256の電波レリック方向の磁場構造推定 (2015)
  • Author(s): 小澤武揚
  • Organizer: 日本天文学会2015年秋期年会
  • Place of Presentation: 甲南大学岡本キャンパス
  • Year and Date: 2015-09-09
• [Presentation] 衝突銀河団CIZA J1358.9-4750の衝撃波付近における鉄原子の電離状態 (2015)
  • Author(s): 加藤佑一
  • Organizer: 日本天文学会2015年秋期年会
  • Place of Presentation: 甲南大学岡本キャンパス
  • Year and Date: 2015-09-09
• [Presentation] Suzaku Observations of the Galaxy Cluster 1RXS J0603.3+4214 (2015)
  • Author(s): Madoka Itahana
  • Organizer: Spectroscopy of Cosmic Plasma in the Era of ASTRO-H
  • Place of Presentation: Aoyama Gakuin University
  • Year and Date: 2015-05-25
  • Int'l Joint Research
• [Presentation] 銀河団1RXS J0603.3+4214の電波レリック周辺領域での物理状態と粒子加速過程 (2015)
  • Author(s): 板花まどか
  • Organizer: 日本天文学会2015年春期年会
  • Place of Presentation: 大阪大学豊中キャンパス（大阪府豊中市）
  • Year and Date: 2015-03-18
• [Presentation] 電波銀河NGC3862の偏波観測による銀河団Abell1367の磁場推定 (2015)
  • Author(s): 高橋育美
  • Organizer: 日本天文学会2015年春期年会
  • Place of Presentation: 大阪大学豊中キャンパス（大阪府豊中市）
  • Year and Date: 2015-03-18
• [Presentation] 「すざく」衛星による銀河団 Abell 3391 と Abell 3395 の連結領域の観測 (2015)
  • Author(s): 菅原悠宇紀
  • Organizer: 日本天文学会2015年春期年会
  • Place of Presentation: 大阪大学豊中キャンパス（大阪府豊中市）
  • Year and Date: 2015-03-18
• [Presentation] 衝突初期の銀河団CIZA J1358.9-4750の「すざく」による追加観測～外縁部のICMの特徴～ (2015)
  • Author(s): 加藤佑一
  • Organizer: 日本天文学会2015年春期年会
  • Place of Presentation: 大阪大学豊中キャンパス（大阪府豊中市）
  • Year and Date: 2015-03-18
• [Presentation] X線と電波で探る銀河団電波レリックの粒子加速過程 (2014)
  • Author(s): 滝沢元和
  • Organizer: 日本SKAサイエンス会議「宇宙磁場」2014
  • Place of Presentation: 国立天文台三鷹キャンパス（東京都三鷹市）
  • Year and Date: 2014-11-13
• [Presentation] 銀河団Abell1367の偏波解析の結果報告 (2014)
  • Author(s): 高橋育美
  • Organizer: 日本SKAサイエンス会議「宇宙磁場」2014
  • Place of Presentation: 国立天文台三鷹キャンパス（東京都三鷹市）
  • Year and Date: 2014-11-13
• [Presentation] 衝突銀河団CIZA1359-48のATCA観測 (2014)
  • Author(s): 赤堀卓也
  • Organizer: 日本SKAサイエンス会議「宇宙磁場」2014
  • Place of Presentation: 国立天文台三鷹キャンパス（東京都三鷹市）
  • Year and Date: 2014-11-13
• [Presentation] 銀河団Abell2256のJVLA偏波観測結果 (2014)
  • Author(s): 小澤武揚
  • Organizer: 日本SKAサイエンス会議「宇宙磁場」2014
  • Place of Presentation: 国立天文台三鷹キャンパス（東京都三鷹市）
  • Year and Date: 2014-11-13
• [Presentation] Particle Acceleration Processes in Galaxy Cluster Radio Relics Investigated thorough X-ray and Radio Observations (2014)
  • Author(s): Motokazu Takizawa
  • Organizer: Cosmic Magnetic Fields: Current Knowledge and the Future Ideas
  • Place of Presentation: Przegorzaly Guesthouse of the Jagiellonian University, Krakow, Poland
  • Year and Date: 2014-10-23
• [Presentation] 電波レリックを持つ銀河団1RXS J0603.3+4214の衝撃波候補領域の解析 (2014)
  • Author(s): 板花まどか
  • Organizer: 日本天文学会2014年秋季年会
  • Place of Presentation: 山形大学小白川キャンパス（山形県山形市）
  • Year and Date: 2014-09-11
• [Presentation] 衝突銀河団 Abell 2256 のJVLA偏波観測結果 (2014)
  • Author(s): 小澤武揚
  • Organizer: 日本天文学会2014年秋季年会
  • Place of Presentation: 山形大学小白川キャンパス（山形県山形市）
  • Year and Date: 2014-09-11