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Cosmological Constant and the Evolution of the Universe

Research Project

Project/Area Number 07304033
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section総合
Research Field 物理学一般
Research InstitutionThe University of Tokyo

Principal Investigator

SATO Katsuhiko  The Univ. of Tokyo, Graduate School of Science, Prof., 大学院・理学系研究科, 教授 (00111914)

Co-Investigator(Kenkyū-buntansha) YOKOYAMA Junichi  Kyoto Univ., Yukawa Inst., Ass. Prof., 基礎物理学研究所, 助教授 (50212303)
SUTO Yasushi  The Univ. of Tokyo, Graduate School of Science, Ass. Prof., 大学院・理学系研究科, 助教授 (20206569)
SUGIYAMA Naoshi  Kyoto Univ., Fac. of Science, Ass. Prof., 大学院・理学研究科, 助教授 (70222057)
KODAMA Hideo  Kyoto Univ., Yukawa Inst. Prof., 基礎物理学研究所, 教授 (40161947)
SASAKI Misao  Osaka Univ., Fac. of Science, Prof., 大学院・理学研究科, 教授 (70162386)
前田 恵一  早稲田大学, 理工学部, 教授 (70199610)
川崎 雅裕  東京大学, 宇宙線研究所, 助教授 (50202031)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 1996: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1995: ¥3,300,000 (Direct Cost: ¥3,300,000)
KeywordsCosmological Constant / Inflation / Cosmic Microwave / Large Scale Structure / Chemical Evolution / Gravitational Leusing / de Sitter Space-Time / Age of the Universe / ハッブル定数 / 相転移 / 元素合成
Research Abstract

1) Neutrino Background Radiation due to Supernove Explosion
Recently Superkamiokande project has started and it can observe the relic neutrino through supernove explostion. We investigated carefuly the spectrum of relic neutrino using the model for the chemical evolution of galaxies. The total flux depends strongly on the Hubble parameter, but weakly on the cosmological constant. We found that in the same flat universe model the flux in lambda=0 is smaller than that in lambda*o.
2) Primordial Nucleosynthesis
The primordial nucleosynthesis is best tool for deciding the baryon density. Recently, associated with the progress of techonology in obsevational field, the obsevational result pointed out that the simple model for cosmology has a trouble point. Some of people call the problem as 'crisis' in the universe. Hence, we taken account of the theoretical error in the lepton asymmetry universe and estimeted statistically the final fraction of the light elements by Monte Calro simulation. The result is that the best values for the degenerate parameter and the baryon density are 0.043(]SY.+-。[)0.040 and 0.015(]SY.+-。[)0.006-0.003 (CL.95 percent).

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] 戸谷反則: "Effects of neutrillo oscillation on the Superrora Relic" International Journal Modem Physics D. 5. 519-527 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 佐々木節: "Cun the Simplert Two-Field Model of Open Inflation Survive?" Physical Review D. 54. 4705-4708 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 小玉英雄: "Evolution of Cosmological Perturbation in a Stage" Progress of Theuretical Physics. 96. 949-970 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 川崎雅裕: "Constraint on the Reheating Temperature" Physics Letters. B370. 52-58 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 須藤靖: "The X-ray halo of the Local group" The Astrophysical Journal. 461. L33-L36 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 川崎雅裕: "Isocurrature and adiahatic fluctuations of axion" Physical Review D. 54. 2442-2446 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 佐藤勝彦: "相対性理論" 岩波書店, 222 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 小玉英雄: "相対性理論" 培風館, 315 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tomonori Totani: "Effects of neutrino oscillation on the Superiuva Relic" International Journal Modern Physics. D5. 517-527 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Misao Sasaki: "Can the Simpleit Two-Field Model of Open Intlation Survire?" Physical Review. D54. 4705-4708 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hideo Kodama: "Evolution of Cosmological Perturbation" Progress of Theoretial Physics. Vol. 96. 949-970 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Masahiro Kawasaki: "Constraint on the Reheating Temperature" Physics Letters. B370. 52-58 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Yasushi Suto: "The X-ray halo of the Local Group" The Astrophysical Journal. 461. L33-L36 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Masahiro Kawasaki: "Iso curvature and Adiahatic fluctuations of Axion" Physical Review. D54. 2442-2446 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Katsuhiko Sato: General Relativity. Iwanami, (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hideo Kodama: General Relativity. Bai-hu-kan, (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 戸谷 友則: "Effects of neutrino oscillation on the Supernova Relic" International Journal Modern Physics D. 5. 519-527 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 佐々木 節: "Can the Simplest Two-Field Model of Open Infation Survive?" Physical Review D. 54. 4705-4708 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 小玉 英雄: "Evolution of Casnological Perturbation in a Stage" Progress of Thoretical Physics. 96. 949-970 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 川崎 雅裕: "Constraint on the Reheating Temperature" Physics Letters. B370. 52-58 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 須藤 靖: "The X-ray halo of the Local Group" The Astrophysical Journal. 461. L33-L36 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 川崎 雅裕: "Isocurvature and Adiabatic Fluctuations of Axion" Physical Review D. 54. 2442-2446 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 佐藤 勝彦: "相対性理論" 岩波書店, 222 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 小玉 英雄: "相対性理論" 培風館, 315 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] K. Sato, T. Totani: "Spectrun of velic neutrino background from past supernovae and cosmological models" Astro particle Physus. 3. 367-376 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] M. kawasaki, T. Mori: "Gravitino Production in Iaflctionary Unioerse and the effects on Bug Bang Nucleostnthesis" Prog. Theor, Phys.93. 879-899 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T. Shiromizu, M. Marukawa, J. Yokoyama: "Thermal Flnctnations in electroweek Phare Transition" Prog. Theor, Phys.94. 805-822 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] M. Yoshimura: "Catastrophic Particle Prodnction Wder Periodic Pertunbation" Prog. Theor, Phys.94. 873-898 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y. Suto, T. Susinohira, Y. Inagaki: "Limits on the Global Habble Constant and the age of the Universe" Prog. Theor, Phys.93. 839-843 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y. Yosii, A.Peterson: "Interpretation of the faint galaxy number count in the K-brnd" Astrophys. Joural. 444. 15-20 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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