Search for Cluster Gas Motion with X-ray Spectroscopy

2009 Fiscal Year Final Research Report

• Project/Area Number: 19740112
• 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: OTA Naonmi Japan Aerospace Exploration Agency, 理学部第一部, 助教 (40391891)
• Project Period (FY): 2007 – 2009
• Keywords: X線γ線天文学

Research Abstract

To reveal the dynamical evolution of the largest objects in the Universe called "clusters of galaxies", an X-ray spectroscopy with the Suzaku satellite has been performed. Since the clusters of galaxies contain a large amount of hot gas, it is possible to measure the motion and temperature of the gas in detail. In particular, we have confirmed, for the first time, the presence of the hottest gas (with temperature of 0.3 billion degree) in the Universe inside the RXJ1347 cluster with the X-ray observations.

Research Products

• [Journal Article] X-ray Diagnostics of Thermal Conductions of the Hot Plasmas in the Centaurus Cluster (2009)
  • Author(s): I. Takahashi, M. Kawaharada, K. Makishima, K. Matsushita, Y. Fukazawa, Y. Ikebe, T. Kitaguchi, M. Kokubun, K. Nakazawa, S. Okuyama, N. Ota, T. Tamura
  • Journal Title: ApJ 701 Pages: 377-395
  • 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, Y. Ishisaki, A. Hoshino, T. Ohashi, N. Ota, Y. Fujita
  • Journal Title: A&A 501 Pages: 899-905
  • Peer Reviewed
• [Journal Article] Constraints on the Intracluster Dust Emission in the Coma Cluster of Galaxies (2009)
  • Author(s): T. Kitayama, Y. Ito, Y. Okada, H. Kaneda, H. Takahashi, N. Ota, T. Onaka, Y. Tajiri, H. Nagata, K. Yamada
  • Journal Title: ApJ 695 Pages: 1191-1198
  • Peer Reviewed
• [Journal Article] Constraints on Non-Thermal X-ray Emission from the On-Going Merger Cluster Abell 3376 with Suzaku (2009)
  • Author(s): N. Kawano, Y. Fukazawa, S. Nishino, K. Nakazawa, T. Kitaguchi, K. Makishima, T. Takahashi, M. Kokubun, N. Ota, T. Ohashi, N. Isobe, P. Henry, A. Hornschemeier
  • Journal Title: PASJ 61 Pages: S377-S386
  • Peer Reviewed
• [Journal Article] A bright, dust-obscured, millimeter-selected galaxy beyond the Bullet Cluster (1E0657-56) (2008)
  • Author(s): G. W. Wilson, I. Aretxaga, D. Hughes, H. Ezawa, J. E. Austermann, S. Doyle, I. Hernandez-Curiel, R. Kawabe, T. Kitayama, K. Kohno, A. Kuboi, H. Matsuo, P. D. Mauskopf, Y. Murakoshi, A. Montana, P. Natarajan, T. Oshima, N. Ota, T. Perera, J. Rand, K. S. Scott, K. Tanaka, T. Tsuboi
  • Journal Title: MNRAS 390 Pages: 1061-1070
  • Peer Reviewed
• [Journal Article] Suzaku broad-band spectroscopy of RX J1347. 5-1145: constraints on the extremely hot gas and non-thermal emission (2008)
  • Author(s): N. Ota, K. Murase, T. Kitayama, E. Komatasu, M. Hattori, H. Matsuo, T. Oshima, Y. Suto, K. Yoshikawa
  • Journal Title: A&A 491 Pages: 363-377
  • Peer Reviewed
• [Journal Article] LX-T relation and thermal evolution of galaxy clusters (2008)
  • Author(s): N. Ota, T. Kiatayama, K. Masai, K. Mitsuda
  • Journal Title: The Chinese Journal of Astronomy and Astrophysics 8 Pages: 84-92
  • Peer Reviewed
• [Journal Article] Suzaku Observations of HCG62: Temperature, Abundance, and Extended Hard X-ray Emission Profiles (2008)
  • Author(s): T. Tokoi, K. Sato, Y. Ishisaki, T. Ohashi, N.Y. Yamasaki, K. Nakazawa, K. Matsushita, Y. Fukazawa, A. Hoshino, T. Tamura, C. Egawa, N. Kawao, N. Ota, N. Isobe, M. Kawaharada, H. Awaki, J.P. Hughes
  • Journal Title: PASJ 60 Pages: S317-S332
  • Peer Reviewed
• [Journal Article] X-ray Study of Temperature and Abundance Profiles of the Cluster of Galaxies Abell 1060 with Suzaku (2007)
  • Author(s): K. Sato, N.Y. Yamasaki, M. Ishida, Y. Ishisaki, T. Ohashi, H. Kawahara, T. Kitaguchi, M. Kawaharada, M. Kokubun, K. Makishima, N. Ota, K. Nakazawa, T. Tamura, K. Matsushita, N. Kawano, Y. Fukzawa, J.P. Hughes
  • Journal Title: PASJ 59 Pages: 299-317
  • Peer Reviewed
• [Presentation] Extremely hot gas in the most X-ray luminous cluster RXJ1347 (2009)
  • Author(s): N. Ota
  • Organizer: The Energetic Cosmos: from Suzaku to Astro-H
  • Place of Presentation: 北海道・グランドパーク小樽
  • Year and Date: 2009-07-01
• [Presentation] Velocity diagnostics in distant galaxy clusters with IXO (2008)
  • Author(s): N. Ota
  • Organizer: Exploring the Hot Universe with IXO
  • Place of Presentation: ドイツ・マックスプランク研究所
  • Year and Date: 2008-09-18
• [Presentation] LX-T relation and thermal evolution of galaxy clusters (2007)
  • Author(s): N. Ota
  • Organizer: The Frascati Workshop 2007
  • Place of Presentation: イタリア・ブルカノ島
  • Year and Date: 2007-05-28
• [Remarks]
  • URL: http://www.rs.kagu.tus.ac.jp/ota/
• [Remarks]
  • URL: http://www.isas.jaxa.jp/j/forefront/2009/oota/index.shtml