Research on Clusters of Galaxies from Macroscopic and Microscopic Point of Views

• Project/Area Number: 20540269
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Osaka University
• Principal Investigator: FUJITA Yutaka Osaka University, 大学院・理学研究科, 准教授 (10332165)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 宇宙物理 / X線天文学 / プラズマ・核融合 / 宇宙線 / プラズマ / 銀河 / 銀河団

Research Abstract

We studied clusters of galaxies from the macroscopic and microscopic viewpoints. We revealed the dynamics of hot intracluster gas and cosmic-rays through observations with an X-ray satellite and a radio telescope. We also found that cosmic-rays take a long time to escape from acceleration sources.

Research Products

• [Journal Article] Search for the Sunyaev-Zel'dovich Effect in a Giant Radio Galaxy B1358+305 (2010)
  • Author(s): Masako Yamada, Yutaka Fujita, et al.
  • Journal Title: The Astronomical Journal 139巻 Pages: 2494-2503
  • Peer Reviewed
• [Journal Article] Slow Diffusion of Cosmic Rays Around a Supernova Remnant (2010)
  • Author(s): Yutaka Fujita, Yutaka Ohira, Fumio Takahara
  • Journal Title: The Astrophysical Journal 712巻
  • Peer Reviewed
• [Journal Article] Slow Diffusion of Cosmic Rays Around a Supernova Remnant (2010)
  • Author(s): Yutaka Fujita
  • Journal Title: The Astrophysical Journal Volume: 712
  • Peer Reviewed
• [Journal Article] Search for the Sunyaev-Zel'dovich Effect in a Giant Radio Galaxy B1358+305 (2010)
  • Author(s): Masaki Yamada, Yutaka Fujita, et al.
  • Journal Title: The Astronomical Journal Volume: 139 Pages: 2494-2503
  • Peer Reviewed
• [Journal Article] Suzaku Observation of Diffuse X-Ray Emission from the Open Cluster Westerlund 2: a Hypernova Remnant? (2009)
  • Author(s): Yutaka Fujita, Kiyoshi Hayashida, et al.
  • Journal Title: Publications of the Astronomical Society of Japan 61巻 Pages: 1229-1235
  • NAID: 120006828418
  • Peer Reviewed
• [Journal Article] Molecular Clouds as a Probe of Cosmic-Ray Acceleration in a Supernova Remnant (2009)
  • Author(s): Yutaka Fujita, Yutaka Ohira, et al.
  • Journal Title: The Astrophysical Journal 707巻
  • Peer Reviewed
• [Journal Article] Is the PAMELA anomaly caused by supernova explosions near the Earth? (2009)
  • Author(s): Yutaka Fujita, Kazunori Kohri, et al.
  • Journal Title: Physical Review D 80巻 Pages: 0630031-0630035
  • Peer Reviewed
• [Journal Article] Suzaku Measurement of Abell 2204's Intracluster Gas Temperature Profile out to 1800 kpc (2009)
  • Author(s): T.H. Reiprich, D.S. Hudson, Y.-Y. Zhang, K. Sato, Y. Ishisaki, A. Hoshino, T. Ohashi, N. Ota, Yutaka Fujita
  • Journal Title: Astronomy and Astrophysics 501巻 Pages: 899-905
  • Peer Reviewed
• [Journal Article] Long-Term Evolution of and X-Ray Emission from a Recoiling Supermassive Black Hole in a Disk Galaxy (2009)
  • Author(s): Yutaka Fujita
  • Journal Title: The Astrophysical Journal 691巻 Pages: 1050-1057
  • Peer Reviewed
• [Journal Article] H band Image of a Planetary Companion around HR 8799 in 2002 (2009)
  • Author(s): M.Fukagawa
  • Journal Title: The Astrophysical Journal 696
  • Peer Reviewed
• [Journal Article] Suzaku Measurement of Abell 2204's Intracluster Gas Temperature Profile out to 1800kpc (2009)
  • Author(s): T.H.Reiprich
  • Journal Title: Astronomy and Astrophysics 501 Pages: 899-905
  • Peer Reviewed
• [Journal Article] Is the PAMELA anomaly caused by the supernova explosions near the Earth? (2009)
  • Author(s): Y.Fujita
  • Journal Title: Physical Review D 80 Pages: 0630031-5
  • Peer Reviewed
• [Journal Article] Molecular Clouds as a Probe of Cosmic-Ray Acceleration in a Supernova Remnant (2009)
  • Author(s): Y.Fujita
  • Journal Title: The Astrophysical Journal 807
  • Peer Reviewed
• [Journal Article] Suzaku Observation of the Diffuse X-Ray Emission from the Open Cluster Westerlund 2 : a Hypernova Remnant? (2009)
  • Author(s): Y.Fujita
  • Journal Title: Publications of the Astronomical Society of Japan 61 Pages: 1229-1235
  • NAID: 120006828418
  • Peer Reviewed
• [Journal Article] Long-Term Evolution of and X-Ray Emission from a Recoiling Supermassive Black Hole in a Disk Galaxy (2009)
  • Author(s): Y.Fujita
  • Journal Title: The Astrophysical Journal 691 Pages: 1050-1057
  • Peer Reviewed
• [Journal Article] Suzaku Observation of the Ophiuchus Galaxy Cluster: One of the Hottest Cool Core Clusters (2008)
  • Author(s): Yutaka Fujita, Kiyoshi Hayashida, et al.
  • Journal Title: Publications of the Astronomical Society of Japan 60巻 Pages: 1133-1142
  • NAID: 10023955091
  • Peer Reviewed
• [Journal Article] X-Ray Emission from a Supermassive Black Hole Ejected from the Center of a Galaxy (2008)
  • Author(s): Yutaka Fujita
  • Journal Title: The Astrophysical Journal 685巻
  • Peer Reviewed
• [Journal Article] High Metallicity of the X-Ray Gas Up to the Virial Radius of a Binary Cluster of Galaxies : Evidence of Galactic Superwinds at High-Redshift (2008)
  • Author(s): Y.Fujita
  • Journal Title: Publications of the Astronomical Society of Japan 60
  • NAID: 10023956882
  • Peer Reviewed
• [Journal Article] X-Ray Emission from a Supermassive Black Hole Ejected from the Center of a Galaxy (2008)
  • Author(s): Y.Fujita
  • Journal Title: The Astrophysical Journal 685
  • Peer Reviewed
• [Journal Article] Suzaku Observation of the Ophiuchus Galaxy Cluster : One of the Hottest Cool Core Clusters (2008)
  • Author(s): Y.Fujita
  • Journal Title: Publications of the Astronomical Society of Japan 60 Pages: 1133-1142
  • NAID: 10023955091
  • Peer Reviewed
• [Presentation] 加速された宇宙線の超新星残骸からの脱出について (2011)
  • Author(s): 藤田裕、高原文郎
  • Organizer: 日本天文学会
  • Place of Presentation: (東日本大震災により予稿集での発表)
  • Year and Date: 2011-03-18
• [Presentation] 加速された宇宙線の超新星残骸からの脱出について (2011)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会2011年春季年会
  • Place of Presentation: 筑波大学(茨城県)
  • Year and Date: 2011-03-18
• [Presentation] Suzaku observation of the Ophiuchus cluster (2011)
  • Author(s): 藤田裕
  • Organizer: Work Shop on Custers of Galaxies
  • Place of Presentation: 岐阜大学(岐阜県)(招待講演)
  • Year and Date: 2011-02-23
• [Presentation] Suzaku Observations of the Outskirts of A399/A401 (2011)
  • Author(s): 藤田裕
  • Organizer: Work Shop on Custers of Galaxies
  • Place of Presentation: 岐阜大学(岐阜県)(招待講演)
  • Year and Date: 2011-02-22
• [Presentation] 超新星残骸で加速された宇宙線のゆっくりとした脱出 (2010)
  • Author(s): 藤田裕
  • Organizer: 理論懇シンポジウム「林忠四郎尭生と天文学・宇宙物理学」
  • Place of Presentation: 京都大学基礎物理学研究所(京都府)
  • Year and Date: 2010-12-20
• [Presentation] 超新星残骸で加速された宇宙線のゆっくりとした脱出 (2010)
  • Author(s): 藤田裕
  • Organizer: 高エネルギー宇宙物理学研究会
  • Place of Presentation: 高エネルギー加速器研究機構(茨城県)(招待講演)
  • Year and Date: 2010-10-15
• [Presentation] 超新星残骸で加速された宇宙線のゆっくりとした脱出 (2010)
  • Author(s): 藤田裕、大平豊、高原文郎
  • Organizer: 日本天文学会
  • Place of Presentation: 金沢大学
  • Year and Date: 2010-09-22
• [Presentation] 超新星残骸で加速された宇宙線のゆっくりとした脱出 (2010)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会2010年秋季年会
  • Place of Presentation: 金沢大学(石川県)
  • Year and Date: 2010-09-22
• [Presentation] 高エネルギー天体としての銀河団 (2010)
  • Author(s): 藤田裕
  • Organizer: 天文天体物理若手夏の学校
  • Place of Presentation: ホテル日航豊橋(愛知県)(招待講演)
  • Year and Date: 2010-08-04
• [Presentation] High metallicity of the X-ray gas up to the virial radius of a binary cluster of galaxies : evidence of galactic superwinds at high-redshift (2010)
  • Author(s): 藤田裕
  • Organizer: CL J2010+0628 : from Massive Galaxy Formation to Dark Energy
  • Place of Presentation: 東京大学数物連携宇宙研究機構(千葉県)
  • Year and Date: 2010-07-01
• [Presentation] 分子雲からのγ線で探る超新星残骸での宇宙線加速 (2010)
  • Author(s): 藤田裕、大平豊、田中周太、高原文郎
  • Organizer: 日本天文学会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-25
• [Presentation] 分子雲からのγ線で探る超新星残骸での宇宙線加速t (2010)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会2010年春季年会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-25
• [Presentation] Slow Diffusion of Cosmic-Rays around a Supernova Remnant (2010)
  • Author(s): 藤田裕
  • Organizer: ジェット研究会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2010-03-19
• [Presentation] Molecular Clouds as a Probe of Cosmic-Ray Acceleration in a Supernova Remnant (2010)
  • Author(s): 藤田裕
  • Organizer: The 10th. International Symposium on Origin of Matter and Evolution of the Galaxies
  • Place of Presentation: 大阪大学
  • Year and Date: 2010-03-09
• [Presentation] 銀河団磁場 (2009)
  • Author(s): 藤田裕
  • Organizer: 「宇宙創成の物理」計画研究A05班第2回戦略会議
  • Place of Presentation: 東京大学
  • Year and Date: 2009-12-21
• [Presentation] 分子雲からのγ線で探る超新星残骸での宇宙線加速 (2009)
  • Author(s): 藤田裕
  • Organizer: 2009年度理論懇シンポジウム
  • Place of Presentation: 名古屋大学
  • Year and Date: 2009-12-20
• [Presentation] 分子雲近傍での超新星爆発と粒子加速 (2009)
  • Author(s): 藤田裕
  • Organizer: 高エネルギー宇宙物理学研究会
  • Place of Presentation: みやじま「杜の宿」(広島)
  • Year and Date: 2009-11-19
• [Presentation] すざくによる Westerlund 2の観測とその解釈 (2009)
  • Author(s): 藤田裕
  • Organizer: 高エネルギージェットと星間媒質
  • Place of Presentation: 名古屋大学
  • Year and Date: 2009-10-05
• [Presentation] 「すざく」によるγ線散開星団 Westerlund 2の観測 (2009)
  • Author(s): 藤田裕、林田清、高橋宏明、高原文郎
  • Organizer: 日本天文学会
  • Place of Presentation: 山口大学
  • Year and Date: 2009-09-15
• [Presentation] PAMELA anomaly の超新星爆発による説明 (2009)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会2009年秋季年会
  • Place of Presentation: 山口大学
  • Year and Date: 2009-09-15
• [Presentation] 「すざく」によるγ線散開星団 Westerlund 2の観測 (2009)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会2009年秋季年会
  • Place of Presentation: 山口大学
  • Year and Date: 2009-09-15
• [Presentation] Suzaku Observation of the Diffuse X-Ray Emission from the Open Cluster Westerlund 2 : a Hypernova Remnant? (2009)
  • Author(s): 藤田裕
  • Organizer: X-RAY ASTRONOMY 2009
  • Place of Presentation: ボローニャ大学 (イタリア)
  • Year and Date: 2009-09-07
• [Presentation] The PAMELA anomaly and the supernova explosions (2009)
  • Author(s): 藤田裕
  • Organizer: 2009 International Conference on Laboratory Astrophysics
  • Place of Presentation: Silk Road Duhuang Hotel (中国)
  • Year and Date: 2009-07-20
• [Presentation] Suzaku Observation of Westerlund 2 : Gamma-ray Emission from a Hypernova Remnant? (2009)
  • Author(s): 藤田裕
  • Organizer: The Energetic Cosmos : from Suzaku to Astro-H
  • Place of Presentation: グランドパーク小樽
  • Year and Date: 2009-06-29
• [Presentation] PAMELA anomaly の超新星爆発による説明 (2009)
  • Author(s): 藤田裕、郡和範、山崎了、井岡邦仁
  • Organizer: 日本天文学会
  • Place of Presentation: 山口大学
  • Year and Date: 2009-06-15
• [Presentation] 反跳巨大ブラックホールからの放射 (2009)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会
  • Place of Presentation: 阪府立大学
  • Year and Date: 2009-03-25
• [Presentation] 反跳巨大ブラックホールからの放射 (2009)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会2009年春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-25
• [Presentation] 反跳巨大ブラックホールからの放射 (2009)
  • Author(s): 藤田裕
  • Organizer: 巨大ブラックホール天文学:最新の動向と課題
  • Place of Presentation: 京都大学基礎物理学研究所
  • Year and Date: 2009-01-21
• [Presentation] 反跳巨大ブラックホールからの放射 (2008)
  • Author(s): 藤田裕
  • Organizer: 理論懇シンポジウム
  • Place of Presentation: 国立天文台
  • Year and Date: 2008-12-15
• [Presentation] すざくで銀河団の「何」がわかるか (2008)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2008-09-13
• [Presentation] すざくで銀河団の「何」がわかるか (2008)
  • Author(s): 藤田裕
  • Organizer: 日本天文学会2008年秋季年会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2008-09-13
• [Presentation] Suzaku observation of Ophiuchus cluster (2008)
  • Author(s): 藤田裕
  • Organizer: Swiss-Japan Seminar
  • Place of Presentation: 宇宙航空研究開発機構
  • Year and Date: 2008-04-16
• [Remarks] ホームページ等
  • URL: http://vega.ess.sci.osaka-u.ac.jp/~fujita/index.html
• [Remarks]
  • URL: http://vega.ess.sci.osaka-u.ac.jp/~fujita/index.html
• [Remarks]
  • URL: http://vega.ess.sci.osaka-u.ac.jp/~fujita/index.html
• [Remarks]
  • URL: http://vega.ess.sci.osaka-u.ac.jp/~fujita/press.htm