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

引力透镜对各种宇宙学观测和宇宙学参数测定的影响

• 批准号: 12640249
• 负责人: FUTAMASE Tohifumi
• 金额: $ 1.09万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640249/
• 关键词: Gravitational 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

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.

我们提出了一种利用强引力透镜系统测量宇宙常数的新方法。如果将该方法应用于2001年5月斯巴鲁望远镜观测到的HST14176+5226，该观测有力地表明了宇宙常数非零的存在。我们首次将Minkowski泛函应用于宇宙剪切场，表明该方法比以往的方法更准确地确定了宇宙的平均密度。我们还详细研究了光在现实的非均匀宇宙中的传播行为，得到了用于从宇宙学观测中确定宇宙模型的基本数据。我们提出了一种方法，利用宇宙微波背景的引力散射来证实我们利用哈勃太空望远镜的数据发现的暗星团的存在。我们研究了宇宙大尺度结构对宇宙微波背景的透镜效应。特别指出，对热点两点关联函数的影响在以后的观测中是可以测量的，密度涨落幅度的信息是独立于密度参数获得的。

项目成果

M.Takada,E.Komatsu,T.Futamase: "Gravitational Lensing Effect on the Correlation of the Hotspots in CMB"Astrophysical Journal Letter. 533. 83-85 (2000)

M.Takada、E.Komatsu、T.Futamase：“引力透镜对 CMB 热点相关性的影响”天体物理学期刊通讯。

S.Yoshida, T.Futamase: "R-mode Instability of Slowly Rotating Relativistic Stars"Physical Review D. 64. 123001 1-123001 7 (2002)

S.Yoshida，T.Futamase：“缓慢旋转相对论恒星的 R 模式不稳定性”物理评论 D. 64. 123001 1-123001 7 (2002)

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)

J. Sato、K. Umetsu、T. Futamase、T. Yamada：“MS 1054-03 附近弱透镜场的拓扑”天体物理学杂志。

S. Yoshida, T. Futamase: "R-mode Instability of Slowly Rotating Non-isentropic Relativistic Stars"Physical Review D. 64, 123001. 1-7 (2002)

S. Yoshida, T. Futamase：“缓慢旋转非等熵相对论恒星的 R 模式不稳定性”物理评论 D. 64, 123001. 1-7 (2002)

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)

H.Tada，T.Futamase：“用引力透镜系统 PG1115 080 确定哈勃参数”理论物理进展。