Observational Study of Energy Transfer to the Intracluster Medium of Clusters of Galaxies

2012 Fiscal Year Final Research Report

• Project/Area Number: 22740132
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: Japan Aerospace Exploration Agency
• Principal Investigator: KAWAHARADA Madoka 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 研究員 (50462677)
• Project Period (FY): 2010 – 2012
• Keywords: X線天文学 / 宇宙物理

Research Abstract

Using the Suzaku data of A1689 and A1835 clusters of galaxies, hot gas regions in the cluster outskirts compared to other peripheral regions were found. These regions are found to be connected to filamentary structures of galaxies. By studying the entropy and total mass distributions, it is suggested that these hot gas regions have formed through shock heating by accreting material from the filamentary structures. Thus, the energy transfer to intracluster medium from cosmic structures has been observationally revealed.

Research Products

• [Journal Article] Two-phase ICM in the Central Region of the Rich Cluster of Galaxies A1795 (2012)
  • Author(s): Gu, Liyi; Xu, Haiguang; Gu, Junhua; Kawaharada, Madoka; Nakazawa, Kazuhiro; Qin, Zhenzhen; Wang, Jingying; Wang, Yu; Zhang, Zhongli; Makishima, Kazuo
  • Journal Title: A Joint Chandra, XMM-Newton, and Suzaku View, Astrophysical Journal Volume: 749 Pages: article id. 186
  • DOI: DOI: 10.1088/0004-637X/749/2/186
  • Peer Reviewed
• [Journal Article] Properties of the Intracluster Medium of Abell 3667 Observed with Suzaku XIS (2012)
  • Author(s): Akamatsu, Hiroki; de Plaa, Jelle; Kaastra, Jelle; Ishisaki, Yoshitaka; Ohashi, Takaya; Kawaharada, Madoka; Nakazawa, Kazuhiro
  • Journal Title: Publications of Astronomical Society of Japan Volume: 64 Pages: article no.49
  • Peer Reviewed
• [Journal Article] Suzaku Observations of the Hydra A Cluster out to the Virial Radius (2012)
  • Author(s): Sato, Takuya; Sasaki, Toru; Matsushita, Kyoko; Sakuma, Eri; Sato, Kosuke; Fujita, Yutaka; Okabe, Nobuhiro; Fukazawa, Yasushi; Ichikawa, Kazuya; Kawaharada, Madoka; and 5 coauthors
  • Journal Title: Publications of Astronomical Society of Japan Volume: 64 Pages: article no. 95
  • Peer Reviewed
• [Journal Article] Suzaku Observations of the Outskirts of A1835: Deviation from Hydrostatic Equilibrium (2012)
  • Author(s): Ichikawa, Kazuya; Matsushita, Kyoko; Okabe, Nobuhiro; Sato, Kosuke; Zhang, Y.-Y.; Finoguenov, A.; Fujita, Yutaka; Fukazawa, Yasushi; Kawaharada, Madoka; Nakazawa, Kazuhiro; and 5 coauthors
  • Journal Title: Astrophysical Journal Volume: 766 Pages: article id. 90
  • DOI: DOI: 10.1088/0004-637X/766/2/90
  • Peer Reviewed
• [Journal Article] The Hard X-ray Imager (HXI) for the ASTRO-H mission (2012)
  • Author(s): Kokubun, Motohide; Nakazawa, Kazuhiro; Enoto, Teruaki; Fukazawa, Yasushi; Kataoka, Jun; Kawaharada, Madoka; Laurent, Philippe; Lebrun, Francois; Limousin, Olivier; Makishima, Kazuo; and 18 coauthors
  • Journal Title: Proceedings of the SPIE Volume: 8443 Pages: 844325-844325-15
  • DOI: DOI: 10.1117/12.925648
• [Journal Article] Kokubun, Motohide; Laurent, Philippe; Lebrun, Francois; and 24 coauthors (2012)
  • Author(s): Watanabe, Shin; Tajima, Hiroyasu; Fukazawa, Yasushi; Blandford, Roger; Enoto, Teruaki; Kataoka, Jun; Kawaharada, Madoka
  • Journal Title: Soft gamma-ray detector for the ASTRO-H Mission, Proceedings of the SPIE Volume: 8443 Pages: 844326-844326-19
  • DOI: DOI: 10.1117/12.925977
• [Journal Article] Temperature and Metallicity (2011)
  • Author(s): Murakami, Hideyoshi; Komiyama, Madoka; Matsushita, Kyoko; Nagino, Ryo; Sato, Takuya; Sato, Kosuke; Kawaharada, Madoka; Nakazawa, Kazuhiro; Ohashi, Takaya; Takei, Yoh, Suzaku and XMM-Newton Observations of the Fornax Cluster
  • Journal Title: Distribution, Publications of Astronomical Society of Japan, Volume: 63 Pages: 963-977
  • Peer Reviewed
• [Journal Article] Babul, Arif; Finoguenov, Alexis; Smith, Graham P.; Taylor, James E., Suzaku X-ray Follow-up Observation of Weak-Lensing-Detected Halos in the Field around ZwCl 0823.2+0425 (2011)
  • Author(s): Watanabe, Eri; Takizawa, Motokazu; Nakazawa, Kazuhiro; Okabe, Nobuhiro; Kawaharada, Madoka
  • Journal Title: Publications of Astronomical Society of Japan Volume: 63 Pages: 357-366
  • Peer Reviewed
• [Journal Article] Suzaku Observation of A1689: Anisotropic Temperature and Entropy Distributions Associated with the Large-scale Structure (2010)
  • Author(s): Kawaharada, Madoka; Okabe, Nobuhiro;Umetsu, Keiichi; Takizawa, Motokazu; Matsushita, Kyoko; Fukazawa, Yasushi; Hamana, Takashi; Miyazaki, Satoshi; Nakazawa, Kazuhiro; Ohashi, Takaya
  • Journal Title: Astrophysical journal Volume: 714 Pages: 423-441
  • DOI: DOI: 10.1088/0004-637X/714/1/423
  • Peer Reviewed
• [Journal Article] Metallicity of the Fossil Group NGC 1550 Observed with Suzaku (2010)
  • Author(s): Sato, Kosuke; Kawaharada, Madoka; Nakazawa, Kazuhiro; Matsushita, Kyoko; Ishisaki, Yoshitaka; Yamasaki, Noriko Y.; Ohashi, Takaya
  • Journal Title: Publications of Astronomical Society of Japan Volume: 62 Pages: 1445-1454
  • Peer Reviewed
• [Journal Article] Laurent, Philippe; Lebrun, Francois; Limousin, Olivier; and 17 coauthors, Hard x-ray imager (HXI) for the ASTRO-H Mission (2010)
  • Author(s): Kokubun, Motohide; Nakazawa, Kazuhiro; Enoto, Teruaki; Fukazawa, Yasushi; Gilmore, Kirk; Kataoka, Jun; Kawaharada, Madoka
  • Journal Title: Proceedings of the SPIE Volume: 7732 Pages: 773215-773215-13
  • DOI: DOI: 10.1117/12.857933
• [Journal Article] Laurent, Philippe; and 19 coauthors, Soft gamma-ray detector for the ASTRO-H Mission (2010)
  • Author(s): Tajima, Hiroyasu; Blandford, Roger; Enoto, Teruaki; Fukazawa, Yasushi; Gilmore, Kirk; Kamae, Tuneyoshi; Kataoka, Jun; Kawaharada, Madoka; Kokubun, Motohide
  • Journal Title: Proceedings of the SPIE Volume: 7732 Pages: article id. 773216
  • DOI: DOI: 10.1117/12.857531
• [Presentation] On the outskirts of galaxy clusters as resolved with Suzaku & prospects with ASTRO-H (2013)
  • Author(s): Kawaharada, M
  • Organizer: The mass profiles of galaxy clusters from the core to the outskirts
  • Place of Presentation: Madonna di Campiglio, Italy
  • Year and Date: 2013-03-19
• [Presentation] ASTRO-H衛星搭載硬X線撮像検出器(HXI)の開発の現状 (2012)
  • Author(s): 川原田 円
  • Organizer: 日本物理学会2012年春季大会
  • Place of Presentation: 関西学院大学(西宮)
  • Year and Date: 2012-03-26
• [Presentation] ASTRO-Hで診る銀河団の進化に伴う銀河団ガスの加熱と粒子加速 (2012)
  • Author(s): 川原田 円,
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 龍谷大学(京都)
  • Year and Date: 2012-03-21
• [Presentation] Japanese plans and technologies for future high-energy astrophysics (2011)
  • Author(s): Kawaharada, M.
  • Organizer: IAC 2011
  • Place of Presentation: Cape Town, South Africa
  • Year and Date: 2011-10-06
• [Presentation] ICM in cluster outskirts affected by large scale structure discovered by A1689 (2011)
  • Author(s): Kawaharada, M.
  • Organizer: X-ray Universe 2011
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2011-06-29
• [Presentation] ICM up to the virial radius (2010)
  • Author(s): Kawaharada, M
  • Organizer: ASTRO-H workshop
  • Place of Presentation: 東京理科大学(東京)
  • Year and Date: 2010-12-27
• [Presentation] Abel 1689 銀河団周辺部の高温ガスの観測的研究 (2010)
  • Author(s): 川原田 円
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 九州工業大学(北九州)
  • Year and Date: 2010-09-13
• [Presentation] Joint X-ray, lensing and optical study of Abell 1689: anisotropic gas temperature and entropy distributions associated with the large-scale structure (2010)
  • Author(s): Kawaharada, M
  • Organizer: CL J2010: from Massive Galaxy Formation to Dark Energy
  • Place of Presentation: IPMU (柏)
  • Year and Date: 2010-06-29
• [Remarks]
  • URL: http://www.astro.isas.ac.jp/suzaku/index.html.ja