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2003 Fiscal Year Final Research Report Summary

Stury of interstellar and intergalactic media based on X-ray line spectra

Research Project

Project/Area Number 12304009
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionTokyo Metropolitan University

Principal Investigator

OHASHI Takaya  Tokyo Metropolitan University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (70183027)

Co-Investigator(Kenkyū-buntansha) ISHIDA Manabu  Tokyo Metropolitan University, Graduate School of Science, Associate Professor, 大学院・理学研究科, 助教授 (20249931)
ISHISAKI Yoshitaka  Tokyo Metropolitan University, Graduate School of Science, Research Associate, 大学院・理学研究科, 助手 (10285091)
SASAKI Shin  Tokyo Metropolitan University, Graduate School of Science, Research Associate, 大学院・理学研究科, 助手 (80262260)
YAMASAKI Noriko  JAXA, Institute of Space and Astronautical Science, Associate Professor, 宇宙科学研究本部, 助教授 (20254146)
FUIIMOTO Ryuichi  JAXA, Institute of Space and Astronautical Science, Research Associate, 宇宙科学研究本部, 助手 (20280555)
Project Period (FY) 2000 – 2003
KeywordsX-ray astronomy / Clusters of galaxies / Intergalactic medium / Energy resolution / Microcalorimeters / Low-temperature detectors / Energy resolution / Transition-edge sensors
Research Abstract

The purpose of this research is to observe X-ray emission from extended hot plasmas in the universe and to study their dynamical evolution. The research activity consists of four areas : observational study of galaxies and clusters of galaxies in X-rays, theoretical study of cosmic plasmas, building and testing of microcalorimeter instrument on-board Astro-E2, and development of TES microcalorimeter system for future spectroscopic observations. In the X-ray observation, ASCA and Chandra revealed that many clusters have experienced mergers based on the temperature and metallicity distribution of bright systems. It is hoped that Astro-E2 will detect significant gas motion in many clusters of galaxies. We have proposed a dedicated small X-ray mission to survey warm-hot intergalactic medium using Oxygen emission lines with an array of TES calorimeters. Theoretical study on the possible heat source for the cluster gas was performed. Microcalorimeters for Astro-E2 have been produced, and the ground tests showed that most of the pixels have energy resolution as good as 6 eV. We also contributed fabrication of filter wheel and software system. We also developed TES calorimeter array in collaboration with Waseda University, Seiko Instruments and Mitsubishi Heavy Industory. For a single pixel TES, we achieved energy resolution of 6 eV, close to the world record, and fabricated a test model of the array sensor with 256 pixels, which produced X-ray signals successfully. We also developed a small adiabatic demagnetization refrigerator system capable for calorimeter testings outside of the laboratory. Another new type of instrument, magnetic calorimeters, was also developed and produced signals to 5.5 MeV alpha particles.

  • Research Products

    (12 results)

All 2004 2003 2002

All Journal Article (11 results) Book (1 results)

  • [Journal Article] Inhomogeneity in the Hot Intracluster Medium of Abell 1060 Observed with Chandra2004

    • Author(s)
      A.Hayakawa 他4名
    • Journal Title

      Publ.Astron.Soc.Japan 56

      Pages: 743-752

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Performance of a Bridge-type TES Microcalorimeter, Excess Noise Characteristics and Dependence of Sensitivity on Current2004

    • Author(s)
      Y.Takei 他19名
    • Journal Title

      Nucl.Instr.and Meth in Phys.Res. A-523

      Pages: 134-146

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Detection of 5.5 MeV α-particles with a Magnetic Calorimeter2004

    • Author(s)
      K.Sato 他5名
    • Journal Title

      J.J.Appl.Phys. 43

      Pages: 6477-6478

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Inhomogeneity in the Hot Intracluster Medium of Abell 1060 Observed with Chandra2004

    • Author(s)
      A.Hayakawa et al.
    • Journal Title

      Publ.Astron.Soc.Japan 56

      Pages: 743-752

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Performance of a Bridge-type TES Microcalorimeter, Excess Noise Characteristics and Dependence of Sensitivity on Current2004

    • Author(s)
      Y.Takei et al.
    • Journal Title

      Nucl.Instr.Phys.Res. A-523

      Pages: 134-146

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Detection of 5.5 MeV α-particles with a Magnetic Calorimeter2004

    • Author(s)
      K.Sato, et al.
    • Journal Title

      J.J.Appl.Phys. 43

      Pages: 6477-6478

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Chandra Observation of the Core of the Galaxy Cluster AWM 72003

    • Author(s)
      T.Furusho, N.Y.Yamasaki, T.Ohashi
    • Journal Title

      Astrophys.Journal 596

      Pages: 181-189

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Two Dimensional Imaging by Series-Connected STJs with Sapphire Absorber2002

    • Author(s)
      A.Kushino 他4名
    • Journal Title

      Nucl.Instr.and Meth in Phys.Res. A-487

      Pages: 488-493

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Chandra Observation of the Central Galaxies in the A 1060 Cluster of Galaxies2002

    • Author(s)
      N.Y.Yamasaki, T.Ohashi, T.Furusho
    • Journal Title

      Astrophys.Journal 578

      Pages: 833-841

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Two Dimensional Imaging by Series-connected STJs with Sapphire Absorber2002

    • Author(s)
      A.Kushino, Y.Murakami, N.Y.Yamasaki, T.Ohashi, M.Kurakado
    • Journal Title

      Nucl.Instr.Phys.Res. A-487

      Pages: 488-493

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Chandra Observation of the Central Galaxies in the A1060 Cluster of Galaxies2002

    • Author(s)
      N.Y.Yamasaki, T.Ohashi, T.Furusho
    • Journal Title

      Astrophys.Journal 578

      Pages: 833-841

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] 宇宙を見る新しい目2004

    • Author(s)
      大橋隆哉(分担執筆)
    • Total Pages
      223
    • Publisher
      日本評論社(日本物理学会編)
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2006-07-11  

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