• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2001 Fiscal Year Final Research Report Summary

Study of the highest energy cosmic rays with air fluorescence technique

Research Project

Project/Area Number 11691117
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section海外学術
Research Field 素粒子・核・宇宙線
Research InstitutionThe University of Tokyo

Principal Investigator

TESHIMA Masahiro  The University of Tokyo, ICRR, Associate Prafessor (40197778)

Co-Investigator(Kenkyū-buntansha) MASAKI Fukushima  The University of Tokyo, ICRR, Professor (30241227)
MAKOTO Sasaki  The University of Tokyo, ICRR, Associate Professor (40242094)
NAOAKI Hayashida  The University of Tokyo, ICRR, Assistant (50114616)
SHIGERU Yoshida  The University of Tokyo, ICRR, Assistant (00272518)
CHIKAWA Michiyuki  Kinki University, Dept.of Science and Tech., Professor (50179941)
Project Period (FY) 1999 – 2001
KeywordsThe highest energy cosmic ray / The highest energy cosmic ray / Cosmic Ray / Air Fluorescence light / High Energy Astrophysics / Gamma ray / Mie Scattering
Research Abstract

The Air Fluorescence technique is an excellent method to study the highest energy cosmic rays. In this research, we try to clarify the technical problem in air fluorescence technique and made it more reliable. The most important problem is the estimation of the light extinction in the atmosphere. There are extinction processes, Rayleigh Scattering and Mie Scattering. Rayleigh Scattering is due to the molecule in the atmosphere, Mie Scattering is due to the dust particles in the atmosphere. Therefore, the scattering coefficient and angular distribution in Mie Scattering variate in time to time.
We summarize this research out as follows.
(1) We have studied the UV light extinction in the atmosphere at Akeno observatory using Lidar system.
(2) We discovered 10 events which exceed the theoretical cutoff energy(l020eV) by AGASA detector in Akeno observatory.
(3) We discovered the existence of the clusters in the arrival direction of the highest energy cosmic rays. This result suggests the existence of point sources of the highest energy cosmic rays.

  • Research Products

    (11 results)

All 2001 2000 1999 1998

All Journal Article (11 results)

  • [Journal Article] Anisotropy of cosmic-ray arrival direction at 10^<18>eV observed by AGASA2001

    • Author(s)
      M.Teshima, 他
    • Journal Title

      Proc. Of 27^<th> ICRC Hamburug 1

      Pages: 337-340

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Cluster analysis of extremely high energy cosmic rays in the northern sky2000

    • Author(s)
      M.Teshima, 他
    • Journal Title

      Astro Particle Physics 13

      Pages: 151-160

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Cluster analysis of extremely high energy cosmic rays in the northern sky2000

    • Author(s)
      M.Teshima, et al.
    • Journal Title

      Astropart. Phys. 13

      Pages: 151-160

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Small-Scale Anisotropy of Cosmic Rays Above 10^<19>eV Observed with the Akeno Giant Air Shower Array1999

    • Author(s)
      M.Teshima, 他
    • Journal Title

      AstroPhysical J. 522

      Pages: 225-237

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The Anisotropy of Cosmic Ray Arrival Directions around 10^<18>eV1999

    • Author(s)
      M.Teshima, 他
    • Journal Title

      Astro Particle Physics 10

      Pages: 303-311

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Small-Scale Anisotropy of Cosmic Rays Above 1019eV Observed with the Akeno Giant Air Shower Array1999

    • Author(s)
      M.Teshima, et al.
    • Journal Title

      Astrophys. J. 522

      Pages: 225-237

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The Anisotropy of Cosmic Ray Arrival Directions around 1018eV1999

    • Author(s)
      M.Teshima, et al.
    • Journal Title

      Astropart. Phys. 10

      Pages: 303-311

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Extension of the Cosmic-Ray Energy Spectrum Beyond the Predicted Greisen-Zatsepin-Kuz'min Cutoff1998

    • Author(s)
      M.Teshima, 他
    • Journal Title

      Phys.Rev.Letters 81

      Pages: 1163-1166

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Observations of TeV gamma ray flares from Markarian 501 with the Telescope Array Prototype1998

    • Author(s)
      M.Teshima, 他
    • Journal Title

      AstroPhysical J. Letter 504-2

      Pages: 71-74

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Extension of the Cosmic-Ray Energy Spectrum Beyond the Predicted Greisen-Zatsepin-Kuz'min Cutoff1998

    • Author(s)
      M.Teshima, et al.
    • Journal Title

      Phys.Rev.Letters 81

      Pages: 1163-1166

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Observations of TeV gamma ray flares from Markarian 501 with the Telescope Array Prototype1998

    • Author(s)
      M.Teshima, et al.
    • Journal Title

      Astro.Phys.J.Lett. Vol 504-2

      Pages: L71-L74

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2011-06-18  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi