Study of the equation of state for dark energy and distribution of dark matter by gravitational lensing

利用引力透镜研究暗能量状态方程和暗物质分布

基本信息

  • 批准号:
    15540248
  • 负责人:
  • 金额:
    $ 1.98万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2003
  • 资助国家:
    日本
  • 起止时间:
    2003 至 2005
  • 项目状态:
    已结题

项目摘要

After the precise determination of the cosmological parameters by the observation of Cosmic Microwave Background Radiation, the understanding structure formation of the universe is one of the unsolved and important problem in cosmology. It is well known that dark matter plays a decisive role in this formation and gravitational lens is the only method to observe directly the dark matter. Thus the observation of gravitational lens is very important. In this point of view we performed the observational studies of various gravitational lens phenomena and obtained the following results.1.We performed weak lens analysis of the date from the observations of a distant cluster of galaxies using the Prime forcus came of Subaru Telescope. The cluster is regarded to be at the forming stage. According to our analysis, the distribution of dark matter is well correlated with the distribution of galaxies. This result support the prediction of Cold Dark Matter (CDM) Structure formation scenario.2.We ha … More ve performed strong lens analysis based on Hubble space telescope (HST) and weak lens analysis based on Subaru telescope for a nearby cluster of galaxies A 1689, and determined a precise mass distribution. This gives us a precise determination of the mass of the cluster and density profile. The global shape of the obtained profile coincides with the prediction of the CDM scenario, but we found that the concentration of the density in the central region is much larger than the prediction. We have proposed more observation of cluster of galaxies to HST and Subaru, and accepted partially.3.We have discovered a new cluster of galaxies by weak lens analysis in the region of a distant cluster of galaxies. This indicates the power of the lens analysis to discover cluster of galaxies.4.We have studied the back reaction of an inhomogeneous distribution of matter on the expansion of the universe and found that the effect behaves like the positive spatial curvature and does not change to the acceleration of the expansion. Less
在通过观测宇宙微波背景辐射精确确定宇宙参数之后,理解宇宙的结构形成是宇宙学尚未解决的重要问题之一。众所周知,暗物质在暗物质的形成中起着决定性的作用,引力透镜是直接观测暗物质的唯一方法。因此,引力透镜的观测是非常重要的。在这个观点下,我们对各种引力透镜现象进行了观测研究,得到了以下结果:我们使用斯巴鲁望远镜的主要焦点对遥远星系团的观测数据进行了弱透镜分析。该星团被认为处于形成阶段。根据我们的分析,暗物质的分布与星系的分布密切相关。该结果支持冷暗物质(CDM)结构形成场景的预测。我们利用哈勃空间望远镜(HST)和斯巴鲁望远镜(Subaru telescope)对邻近的星系团a1689进行了强透镜分析和弱透镜分析,得到了精确的质量分布。这使我们可以精确地确定星团的质量和密度分布。所得剖面的整体形状与CDM情景的预测一致,但我们发现中部地区的密度浓度远大于预测。我们向HST和Subaru提出了更多的星系团观测,并部分接受。通过弱透镜分析,我们在一个遥远的星系团区域发现了一个新的星系团。这表明了透镜分析在发现星系团方面的威力。我们研究了非均匀物质分布对宇宙膨胀的反作用,发现这种效应表现为正空间曲率,并且不随膨胀的加速度而改变。少

项目成果

期刊论文数量(56)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Toward a No-go Theorem for a Accelarating Universe by Nonlinear Backreaction
非线性反作用加速宇宙的不可行定理
Panoramic Views of Cluster-Scale Assembly Explored by Subaru Wide-Field Imaging
斯巴鲁广域成像探索集群规模装配的全景
  • DOI:
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    T.Broadhurs;M.Takada;K.Umetsu;X.Kong;N.Arimoto;M.Chiba;T.Futamase;K.Kodama et al.(including T.Futamase)
  • 通讯作者:
    K.Kodama et al.(including T.Futamase)
Discovery of Strong Lensing Galaxy at z=3.9 behind a z=0.89 Galaxy Cluster
在 z=0.89 星系团后面发现 z=3.9 处的强透镜星系
  • DOI:
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M.Ando;TAMA collaboration (including T.Futamase);T.Broadhurst et al.(including T.Futamase);K.Kodama at al.(including T.Futamase);K.Unetsu at al.(including T.Futamase)
  • 通讯作者:
    K.Unetsu at al.(including T.Futamase)
Panoramic Views of Cluster-Scale Assemblies Explored by Subaru-Wide Field Images
通过斯巴鲁宽视野图像探索集群规模组件的全景
Hamiltonian of a free neutron in curved spacetime on the Earth
地球弯曲时空中自由中子的哈密顿量
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FUTAMASE Toshifumi其他文献

FUTAMASE Toshifumi的其他文献

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{{ truncateString('FUTAMASE Toshifumi', 18)}}的其他基金

Application and Theoretical Research on neutrino mass and dark energy using Cosmic big data
宇宙大数据中微子质量和暗能量的应用与理论研究
  • 批准号:
    17K05453
  • 财政年份:
    2017
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Theoretical Study of gravitaional nonlinear growth in structure formation and its application to the observational cosmology
结构形成过程中引力非线性增长的理论研究及其在观测宇宙学中的应用
  • 批准号:
    26400264
  • 财政年份:
    2014
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Test on dark energy-and gravitational theory and higher-dimensional theory using cosmic shear
使用宇宙剪切测试暗能量和引力理论以及高维理论
  • 批准号:
    20540245
  • 财政年份:
    2008
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
A New Gravitational Lens Phenomena by Cluster of Galaxies and the Measurement of Cosmological Constant
星系团的新引力透镜现象及宇宙常数的测量
  • 批准号:
    09640332
  • 财政年份:
    1997
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Determination of Cosmological Constant by Statistical Lens and Effect of Inhomogeneities of the Universe on the Cosmic Age
统计透镜确定宇宙常数及宇宙不均匀性对宇宙年龄的影响
  • 批准号:
    07640366
  • 财政年份:
    1995
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Determing the Dark Matten Distribution and The Cosmological Pavameters by Gavitational Lensing
用空心透镜确定暗哑光分布和宇宙学参数
  • 批准号:
    05640318
  • 财政年份:
    1993
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Theoretical Foundation for Observational Cosmology
观测宇宙学的理论基础
  • 批准号:
    01540226
  • 财政年份:
    1989
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

相似海外基金

A Unified Understanding of the Cold Dark Matter Paradox and Beyond
对冷暗物质悖论及其他悖论的统一理解
  • 批准号:
    23KJ0280
  • 财政年份:
    2023
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for JSPS Fellows
Do We Need Something Beyond Cold Dark Matter?
我们还需要冷暗物质之外的东西吗?
  • 批准号:
    2306340
  • 财政年份:
    2023
  • 资助金额:
    $ 1.98万
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    Standard Grant
Search for dark photon cold dark matter using technologies for CMB anisotropy
使用 CMB 各向异性技术搜索暗光子冷暗物质
  • 批准号:
    21H01093
  • 财政年份:
    2021
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
The Atacama Cosmology Telescope: searching for cracks in the Lambda Cold Dark Matter model
阿塔卡马宇宙学望远镜:寻找 Lambda 冷暗物质模型中的裂缝
  • 批准号:
    2108126
  • 财政年份:
    2021
  • 资助金额:
    $ 1.98万
  • 项目类别:
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Testing the Lambda Cold Dark Matter Model with Dwarf Galaxies around the Milky Way and beyond
用银河系周围及更远的矮星系测试 Lambda 冷暗物质模型
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    2001663
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    2020
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    Fellowship Award
Collaborative Research: Testing the Lambda Cold Dark Matter Paradigm with Dwarf Satellites of Low-mass Galaxies
合作研究:用低质量星系的矮卫星测试 Lambda 冷暗物质范式
  • 批准号:
    1816196
  • 财政年份:
    2018
  • 资助金额:
    $ 1.98万
  • 项目类别:
    Standard Grant
Collaborative Research: Testing the Lambda Cold Dark Matter Paradigm with Dwarf Satellites of Low-mass Galaxies
合作研究:用低质量星系的矮卫星测试 Lambda 冷暗物质范式
  • 批准号:
    1814208
  • 财政年份:
    2018
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  • 项目类别:
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Collaborative Research: Testing the Lambda Cold Dark Matter Paradigm with Dwarf Satellites of Low-mass Galaxies
合作研究:用低质量星系的矮卫星测试 Lambda 冷暗物质范式
  • 批准号:
    1813628
  • 财政年份:
    2018
  • 资助金额:
    $ 1.98万
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    Continuing Grant
Testing the Cold Dark Matter Model by Constraining Dark Matter Substructure in Gravitational Lens Galaxies
通过约束引力透镜星系中的暗物质子结构来测试冷暗物质模型
  • 批准号:
    1615306
  • 财政年份:
    2016
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Search for hidden photon cold dark matter using radio telescopes
使用射电望远镜寻找隐藏的光子冷暗物质
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