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Gravitational Lensing effects on various Cosmological Observations and the determination of Cosmological Parameters

Research Project

Project/Area Number 12640249
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 素粒子・核・宇宙線
Research InstitutionTohoku University

Principal Investigator

FUTAMASE Tohifumi  Tohoku University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (20209141)

Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2002: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2001: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsGravitational Lew / Cosmological Constant / Cosmic Shear / Minkowski functional / Cosmic Microwave Background / ダークマター / ミンコフスキー汎関数 / lognormal分布 / クインテセンス / すばる / アインシュタイン・リング / ハッブル・パラメータ / 宇宙背景輻射
Research Abstract

We have proposed a new method to measure the cosmological constant using strong gravitational lens systems. The method if applied for HST14176+5226 observed by Subaru telescope in May, 2001 and the observation strongly suggests the existence of non-zero cosmological constant. We hove also shown that the method is also useful to determine the time variability of the vacuum energy.
We apply for the first time the Minkowski functional to the cosmic shear field and show that the method determines the mean density of the universe more accurately than previous methods. We have also investigated detailed behavior of light propagation in realistic inhomogeneous universe and obtained basic date which is used to determine the model of the universe from the cosmological observation.
We have proposed a method to confirm the existence of the dark cluster which we have discovered using the date of Hubble space telescope using gravitational scattering of the cosmic microwave background. We have examined lensing effects by large scale structure of the universe on the cosmic microwave background. In particular we have pointed out that the effect on the two-point correlation function of hot spots will be measurable in the future observations and the information of the amplitude of the density fluctuation is obtained independently with the density parameter.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] J.Sato, K.Umetsu, T.Futamase, T.Yamada: "The topology of Weak Lensing"Astrophysical Journal. 582. L67-L71 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Futamase: "Observations of dark side of the universe by gravitational lensing"International Journal of Modern Physics A. 17. 2677-2687 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O.Aso, M.Hattori, T.Futamase: "The gravitational scattering of the CMB by dark clusters"Astrophysical Journal Letters. 576. L5-L7 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ohyama, T.Hamana, M.Chiba, T.Futamase: "Subaru Observation of Gravitational Lens HST 14176+5226"Astronomy Journal. 123. 2903-2910 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S.Yoshida, T.Futamase: "R-mode Instability of Slowly Rotating Relativistic Stars"Physical Review D. 64. 123001 1-123001 7 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Futamase, S.Yoshida: "Possible measurement of Quintessence and density parameter"Progress of Theoretical Physics. 105. 887-890 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] J. Sato, K. Umetsu, T. Futamase, T. Yamada: "The Topology of a Weak Lensing Field in the Neighborhood of MS 1054-03"Astrophysical Journal. 582. L67-L71 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Futamase: "Observations of dark side of the universe by gravitational"International Journal of Modern Physics A. 17. 2677-2787 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] O. Aso, M. Hattori, T. Futamase: "The gravitational scattering of the CMB by dark clusters of galaxies"Astrophysical Journal Letter. 576. L5-L7 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y. Ohyama, T. Hamana, N. Kashikawa, M. Chibe, T. Futamase: "Subaru Spectroscopy of Gravitational Lens HST 14176+5226: Implications for a Large Cosmological Constant"Astronomy Journal. 123. 2903-2910 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Yoshida, T. Futamase: "R-mode Instability of Slowly Rotating Non-isentropic Relativistic Stars"Physical Review D. 64, 123001. 1-7 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Futamase, S. Yoshida: "Possible measurement of Quintessence and density parameter using strong gravitational lensing events"Progress of Theoretical Physics. 105. 887-890 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S.Sato, K.Umetsu, T.Futamase: "The topology of a Weak Lensing Field in the Neighborhood of MS1054-03"Astrophysical Journal. 582. L67-L71 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Futamase: "Observations of dark side of the universe by gravitational Lensing"International Journal of Modern Physics A. 17. 2677-2687 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] O.Aso, M.Hattori, T.Futamase: "The gravitational scattering of the cosmic microwave background by dark clusters of galaxies"Astrophysical Journal Letter. 576. L5-L7 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Ohyama, T.Hamana, N.Kashikawa, M.Chiba, T.Futamase: "Subaru Spectroscopy of Gravitational Lens HST 14176+5226"Astrophysical Journal. 123. 2903-2911 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Taruya, M, Takeda, T.Hamana, I.Kayo, T.Futamase: "Lognormal Property of Weak Lensing Field"Astrophysical Journal. 571. 638-643 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Yoshida, T.Futamase: "r-mode instability of slowly rotating relativistic stars"Physical Review D. 64. 123001-1-123001-7 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] J.Sato, M.Takeda, Y.Jump, T.Futamase: "Implicatin Ω through morphological analysis of weak lensing"Astrophysial Journal Letters. 551. 5-8 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Kerscher, T.Buchat, T.Futamase: "On the abundance of collapsed objects"Astrohysical Journal Letters. 558. 75-78 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] P.Premma, H.Martel, R.Matsuo, T.Futamase: "Hight propagation in in homogeneous universe"Astrophysical Journal Supplement. 135. 7-39 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Futamase, S.Yoshida: "Possible measurement of Quintessence and density of parameter using strong gravitational lousing enact"Progress of Theoritical Physics. 105. 887-892 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Itoh, T.Futamase, H.Asada: "Equation of motion for Relativitic compas Behavior with strong Field patint partical limit"Phsical Review D. 63. 064038-(1-14) (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Yoshida, T.Futamase: "R-mode instability of slowly rotating nonisentropic relativitic star"Physical Review D. 64. 123001-(1-7) (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Tada,T.Futamase: "A Determination of the Hubble Parameter with the Gravitational Lens System PG1115+080"Progress of Theoretical Physics. 104. 971-980 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] J.Schmalzing,M.Tukada,T.Futamase: "Effect of Weak Lensing to the Tempology of CMB Maps"Astrophysical Journal Letter. 544. 83-86 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Itoh,T.Futamase,H.Asada: "Equation of Motion for relativistic compact binaries with strong field point particle limit"Physical Review D. 62. 064002-1-11 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Umatsu,T.Futamase: "Detection of Dark Matter Concentration in the Field of CL1604+4304 from weak lensing Analysis"Astrophysical Journal Letter. 539. 5-8 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Takada,E.Komatsu,T.Futamase: "Gravitational Lensing Effect on the Correlation of the Hotspots in CMB"Astrophysical Journal Letter. 533. 83-85 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Hamana,T.Futamase: "A new measure of σ_8 using the lensing dispersion in high-z type Ia SNe"Astrophysical Journal. 534. 29-33 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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