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Search for dark baryon in the universe using oxygen emission lines in soft X-ray band

Research Project

Project/Area Number 16340053
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionThe University of Tokyo

Principal Investigator

SUTO Yasushi (2007)  The University of Tokyo, Department of Physics, Professor (90183053)

須藤 靖 (2004-2006)  The University of Tokyo, 大学院・理学系研究科, 教授 (20206569)

Co-Investigator(Kenkyū-buntansha) TARUYA Atsushi  The University of Tokyo, Department of Physics, Assistant Professor (40334239)
OHASHI Takaya  Tokyo Metropolitan University, Department of Physics, Professor (70183027)
SASAKI Shin  Tokyo Metropolitan University, Department of Physics, Assistant Professor (80262260)
Project Period (FY) 2004 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥15,920,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2007: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2006: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2004: ¥4,400,000 (Direct Cost: ¥4,400,000)
Keywordsastrophysics / X-ray astronomy / dark baryon / cluster of galaxies / soft X-ray spectroscopy / gamma-ray burst / 酸素輝線 / 銀河間物質 / 軟X線分光観測 / DIOS
Research Abstract

1) We developed and ran a cosmological hydro-code with our German collaborator, Dr. Klaus Dolag. The code takes account of a variety of physical processes including radiative cooling, star formation, gas heating due to supernovae, chemical evolution.
2) Using the above simulation results, we constructed a mock galaxy catalog in the Local Universe, and discussed the detection feasibility of WHIM (warm-hot intergalactic medium) associated with outskirts of nearby galaxy clusters via oxygen emission lines (Yoshikawa et al. 2004).
3) We also studied the detection feasibility of absorption lines of WHIM using the background quasars and X-ray after glow of gamma-ray bursts (Kawahara et al. 2006).
4) It has been pointed out that the element abundance in WHIM does not obey the ionization equilibrium. We followed the time evolution of the oxygen ionization states using the simulation data, and indeed showed that the ionization equilibrium is not valid in WHIM. We found that the intensity ratio of oxygen lines in different ionization states is a good indicator of the departure from the ionization equilibrium (Yoshikawa and Sasaki 2006).
5) We proposed a new empirical analytic model for temperature and density inhomogeneities in intra-cluster medium, and showed that this nice explains the observation data of galaxy cluster A3667 from Chandra X-ray satellite (kawahar et al.2007,2008).

Report

(5 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (50 results)

All 2009 2008 2007 2006 2005 2004 Other

All Journal Article (40 results) (of which Peer Reviewed: 14 results) Presentation (5 results) Book (4 results) Remarks (1 results)

  • [Journal Article] Systematic Errors in the Hubble Constant Measurement from the Sunyaev-Zel' dovich effect2008

    • Author(s)
      Hajime Kawahara, 他
    • Journal Title

      The Astrophysical Journal 674

      Pages: 11-21

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Extracting Galaxy Cluster Gas Inhomogeneity from X-ray Surface Brightness : A Statistical Approach and Application to Abell 36672008

    • Author(s)
      Hajime Kawahara, 他
    • Journal Title

      The Astrophysical Journal 687

      Pages: 936-950

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Systematic Errors in the Hubble Constant Measurement from the Sunyaev-Zel'dovich effect2008

    • Author(s)
      Hajime Kawahara, et al.
    • Journal Title

      The Astrophysical Journal 674

      Pages: 11-21

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Extracting Galaxy Cluster Gas Inhomogeneity from X-ray Surface Brightness : A Statistical Approach and Application to Abell 36672008

    • Author(s)
      Hajime Kawahara, et al.
    • Journal Title

      The Astronhvsical Journal 687

      Pages: 936-950

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Extracting Galaxy Cluster Gas Inhomogeneity from X-Ray Surface Brightness : A Statistical Approach and Application to Abell 36672008

    • Author(s)
      Hajime Kawahara, 他
    • Journal Title

      The Astrophysical Journal 687

      Pages: 936-950

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Systematic Errors in the Hubble Constant Measurement from the Sunyaev-Zel'dovich Effect2008

    • Author(s)
      Hajime Kawahara, 他
    • Journal Title

      The Astrophysical Journal 674

      Pages: 11-21

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Radial profile and log-normal fluctuations in intra-cluster medium as anorigin for systematic underestimate bias of cluster temperature2007

    • Author(s)
      Hajime Kawahara, 他
    • Journal Title

      The Astrophysical Journal 659

      Pages: 257-266

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Radial profile and log-normal fluctuations in intra-cluster medium as an origin for systematic underestimate bias of cluster temperature2007

    • Author(s)
      Hajime Kawahara, et al.
    • Journal Title

      The Astrophysical Journal 659

      Pages: 257-266

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Radial profile and log-normal fluctuations in intra-cluster medium as an origin for systematic underestimate bias of cluster temperature2007

    • Author(s)
      Hajime Kawahara, 他
    • Journal Title

      The Astrophysical Journal 659

      Pages: 257-266

    • Related Report
      2006 Annual Research Report
  • [Journal Article] EDGE: Explorer of Diffuse emission and Gamma-ray burst Explosions2007

    • Author(s)
      J.W. den Herder, 他
    • Journal Title

      SPIE-proc 2007

      Pages: 6688-6688

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Soft X-Ray Transmission Spectroscopy of a Warm/Hot Intergalactic Medium with XEUS2006

    • Author(s)
      Hajime Kawahara, 他
    • Journal Title

      Publications of the Astronomical Society of Japan 58

      Pages: 657-671

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary 2006 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Systematic Bias in an Estimation of the Cluster Mass and the Fluctuation amplitude from Cluster Abundance2006

    • Author(s)
      Mamoru Shimizu, 他
    • Journal Title

      Publications of the Astronomical Society of Japan 58

      Pages: 291-297

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary 2006 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Non-Equilibrium Ionization state of a Warm-Hot Intergalactic Medium2006

    • Author(s)
      Kohji Yoshikawa, 他
    • Journal Title

      Publications of the Astronomical Society of Japan 58

      Pages: 641-656

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Soft X-ray Transmission Spectroscopy of Warm/Hot Intergalactic Medium: Mock Observation of Gamma-Ray Burst X-ray Afterglow2006

    • Author(s)
      Hajime Kawahara, et al.
    • Journal Title

      Publications of the Astronomical Society of Japan 58

      Pages: 657-671

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Systematic bias in an estimate of the cluster mass and the fluctuation amplitude from cluster abundance statistics2006

    • Author(s)
      Mamoru Shimizu, et al.
    • Journal Title

      Publications of the Astronomical Society of Japan 58

      Pages: 291-297

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Non-Equilibrium Ionization State of a Warm-Hot Intergalactic Medium2006

    • Author(s)
      Kohji Yoshikawa, Shin Sasaki
    • Journal Title

      Publications of the Astronomical Society of Japan 58

      Pages: 641-656

    • NAID

      10023942155

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] An Analytic Model for the Axis-Ratio Distribution of Dark Matter Halos from the Primordial Gaussian Density Field2005

    • Author(s)
      Jounghun Lee, 他
    • Journal Title

      The Astrophysical Journal 632

      Pages: 706-712

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] An Analytic Model for the Axis-Ratio Distribution of Dark Matter Halos from the Primordial Gaussian Density Field2005

    • Author(s)
      Jounghun Lee, et al.
    • Journal Title

      The Astrophysical Journal 632

      Pages: 706-712

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Galaxy clustering constraints on deviations from Newtonian gravity at cosmological scales2005

    • Author(s)
      Akihito Shirata
    • Journal Title

      Physical Review D 71

      Pages: 64030-64030

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Panoramic Views of Cluster-Scale Assembly Provided by Subaru Wide-Field Imaging2005

    • Author(s)
      Tadayuki Kodama
    • Journal Title

      Publications of the Astronomical Society of Japan 57

      Pages: 309-309

    • Related Report
      2005 Annual Research Report
  • [Journal Article] The Rossiter -- McLaughlin effect and analytic radial velocity curves for transiting extrasolar planetary systems2005

    • Author(s)
      Yasuhiro Ohta
    • Journal Title

      The Astrophysical Journal 622

      Pages: 1118-1118

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Measurement of Spin-Orbit Alignment in an Extrasolar Planetary System2005

    • Author(s)
      Joshua N.Winn
    • Journal Title

      The Astrophysical Journal 631

      Pages: 1215-1215

    • Related Report
      2005 Annual Research Report
  • [Journal Article] An Analytic Model for the Axis-Ratio Distribution of Dark Matter Halos from the Primordial Gaussian Density Field2005

    • Author(s)
      Jounghun Lee
    • Journal Title

      The Astrophysical Journal 632

      Pages: 706-706

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Fourier phase analysis of SDSS galaxies2005

    • Author(s)
      Chiaki Hikage
    • Journal Title

      Publications of the Astronomical Society of Japan 57

      Pages: 709-709

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Reconstructing Three-dimensional Structure of Underlying Triaxial Dark Halos From X-ray and Sunyaev-Zel'dovich Effect Observations of Galaxy Clusters2004

    • Author(s)
      Jounghun Lee, 他
    • Journal Title

      The Astrophysical Journal 601

      Pages: 599-609

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Monte-Carlo Modeling of Non-Gravitational Heating Processes in Galaxy Clusters2004

    • Author(s)
      Mamoru Shimizu, 他
    • Journal Title

      Publications of the Astronomical Society of Japan 56

      Pages: 1-16

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Locating the Warm-Hot Intergalactic Medium in the Simulated Local Universe2004

    • Author(s)
      Kohji Yoshikawa, 他
    • Journal Title

      Publications of the Astronomical Society of Japan 56

      Pages: 939-957

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Searching for cosmic missing baryons with DIOS -Diffuse Intergalactic Oxygen Surveyor-2004

    • Author(s)
      Yasushi Suto, 他
    • Journal Title

      Journal of the Korean Physical Society 45

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Tracing the bright and dark sides of the universe with X-ray observations2004

    • Author(s)
      Yasushi Suto, 他
    • Journal Title

      Journal of The Korean Astronomical Society 37

      Pages: 387-392

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Reconstructing Three-dimensional Structure of Underlying Triaxial Dark Halos From X-ray and Sunyaev--Zel'dovich Effect Observations of Galaxy Clusters2004

    • Author(s)
      Jounghun Lee, Yasushi Suto
    • Journal Title

      The Astrophysical Journal 601

      Pages: 599-609

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Monte-Carlo Modeling of Non-Gravitational Heating Processes in Galaxy Clusters2004

    • Author(s)
      Mamoru Shimizu, et al.
    • Journal Title

      Publications of the Astronomical Society of Japan 56

      Pages: 1-16

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Locating the Warm-Hot Intergalactic Medium in the Simulated Local Universe2004

    • Author(s)
      Kohji Yoshikawa, et al.
    • Journal Title

      Publications of the Astronomical Societv of Janan 56

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Searching for cosmic missing baryons with DIOS -- Diffuse Intergalactic Oxygen Surveyor --2004

    • Author(s)
      Yasushi Suto, et al.
    • Journal Title

      Journal of the Korean Physical Society 45

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Tracing the bright and dark sides of the universe with X-ray observations2004

    • Author(s)
      Yasushi Suto, et al.
    • Journal Title

      Journal of The Korean Astronomical Society 37

      Pages: 387-392

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Reconstructing Three-dimensional Structure of Underlying Triaxial Dark Halos From X-ray and Sunyaev--Zel'dovich Effect Observations of Galaxy Clusters2004

    • Author(s)
      Jounghun Lee
    • Journal Title

      The Astrophysical Journal 601

      Pages: 599-609

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Monte-Carlo Modeling of Non-Gravitational Heating Processes in Galaxy Clusters2004

    • Author(s)
      Mamoru Shimizu
    • Journal Title

      Publications of the Astronomical Society of Japan 56

      Pages: 1-16

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A Search for Hα Absorption in the Exosphere of the Transiting Extrasolar Planet HD209458b2004

    • Author(s)
      Joshua N.Winn
    • Journal Title

      Publications of the Astronomical Society of Japan 56

      Pages: 655-662

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Locating the Warm-Hot Intergalactic Medium in the Simulated Local Universe2004

    • Author(s)
      Kohji Yoshikawa
    • Journal Title

      Publications of the Astronomical Society of Japan 56

      Pages: 939-957

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Searching for cosmic missing baryons with DIOS --Diffuse Intergalactic Oxygen Surveyor--2004

    • Author(s)
      Yasushi Suto
    • Journal Title

      Journal of the Korean Physical Society 45

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Tracing the bright and dark sides of the universe with X-ray observations2004

    • Author(s)
      Yasushi Suto
    • Journal Title

      Journal of The Korean Astronomical Society 37

      Pages: 387-392

    • Related Report
      2004 Annual Research Report
  • [Presentation] A Statistical Approach to Galaxy Cluster Gas Inhomogeneity : Chandra Observations of Nearby Galaxy Clusters2009

    • Author(s)
      Reese, 他
    • Organizer
      American Astronomical Society
    • Place of Presentation
      アメリカ合衆国Long Beach
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] A Statistical Approach to Galaxy Cluster Gas Inhomogeneity : Chandra Observations of Nearby Galaxy Clusters2009

    • Author(s)
      Erik Reese
    • Organizer
      American Astronomical Society
    • Place of Presentation
      Long beach, USA
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Log-normal fluctuations in the intracluster medium and their impact on X-ray and SZ cluster observations2008

    • Author(s)
      Yasushi Suto, 他
    • Organizer
      The 3rd KIAS workshop on Cosmology and structure formation
    • Place of Presentation
      KIAS, Seoul, Korea
    • Year and Date
      2008-10-27
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Log-normal fluctuations in the intracluster medium and their impact on X-ray and SZ cluster observations2008

    • Author(s)
      Yasushi Suto
    • Organizer
      The 3^<rd> KIAS workshop on cosmology and structure formation
    • Place of Presentation
      KIAS, Seoul, Korea
    • Year and Date
      2008-10-27
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] X線輝度分布を用いた銀河団ガス内不均一性の探索2008

    • Author(s)
      河原創, 他
    • Organizer
      日本天文学会・秋季年会
    • Place of Presentation
      岡山理科大学
    • Year and Date
      2008-09-11
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 解析力学・量子論2008

    • Author(s)
      須藤靖
    • Total Pages
      296
    • Publisher
      東京大学出版会
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] ものの大きさ-自然の階層・宇宙の階層-2006

    • Author(s)
      須藤靖
    • Total Pages
      182
    • Publisher
      東京大学出版会
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 一般相対論入門2005

    • Author(s)
      須藤靖
    • Total Pages
      186
    • Publisher
      日本評論社
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Book] 一般相対論入門2005

    • Author(s)
      須藤 靖
    • Total Pages
      186
    • Publisher
      日本評論社
    • Related Report
      2005 Annual Research Report
  • [Remarks] 「研究成果報告書概要(和文)」より

    • URL

      http://www-utap.phys.s.u-tokyo.ac.jp/~suto

    • Related Report
      2007 Final Research Report Summary

URL: 

Published: 2004-04-01   Modified: 2016-04-21  

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