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Cosmological nonlinear dynamics and problems of Dark Energy and Dark Matter

Research Project

Project/Area Number 18740164
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionOkinawa National College of Technology

Principal Investigator

MORITA Masaaki  Okinawa National College of Technology, 総合科学科, 准教授 (50390563)

Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,670,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2006: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywords宇宙物理 / 理論天文学
Research Abstract

遠方のIa型超新星と呼ばれる天体の観測から、宇宙にはダークエネルギーと呼ばれる、宇宙膨張を加速させる未知の成分が存在すると考えられている。このダークエネルギーの物理的実体を明らかにするために、宇宙膨張だけでなく非一様性の進化にも着目し、モデルによって非一様性にどのような違いが現れるかを明らかにした。また、非一様性の進化の度合いを表すエントロピーについて考察し、この量が宇宙の進化とともに時間的に増大するかどうかについて調べ、その条件を明らかにした。

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (4 results)

All 2006 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (2 results) Remarks (1 results)

  • [Journal Article] Power spectrum in the Chaplygin gas model : tachyonic, fluid and scalar field representations

    • Author(s)
      C. E. M. Batista, J. C. Fabris, M. Morita
    • Journal Title

      General Relativity and Gravitation (掲載決定・印刷中)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Presentation] Exploring dark energy models with perturbation dynamics2006

    • Author(s)
      Masaaki Morita
    • Organizer
      Joint Meeting of the Pacific Region Particle Physics Communities
    • Place of Presentation
      Honolulu, Hawaii
    • Year and Date
      2006-10-30
    • Related Report
      2008 Final Research Report
  • [Presentation] Exploring dark energy models with perturbation dynamics2006

    • Author(s)
      Masaaki Morita
    • Organizer
      XXIXth Spanish Relativity Meeting E.R.E. 2006
    • Place of Presentation
      Palma de Mallorca, Spain
    • Year and Date
      2006-09-06
    • Related Report
      2008 Final Research Report
  • [Remarks] 雑誌論文(1)を閲覧できるwebページ

    • URL

      http://arxiv.org/abs/0904.3949

    • Related Report
      2008 Final Research Report

URL: 

Published: 2006-04-01   Modified: 2016-04-21  

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