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precision measurement of gravitational lensing using Fourier transformation for dark energy search

Research Project

Project/Area Number 24654074
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

Katayama Nobuhiko  東京大学, カブリ数物連携宇宙研究機構, 教授 (50290854)

Project Period (FY) 2012-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords重力レンズ
Outline of Final Research Achievements

The purpose of this research is to get to the bottom of the mystery of the dark energy by measuring the distribution of dark matter in the universe as a function of time. To measure the distribution of the dark matter we use gravitational lensing. The matter (such as a cluster of galaxies) between a distant source and an observer,is capable of bending the light from the source,as it travels towards the observer. The image of the source galaxies shear because of the matter. By measuring the shear, we can measure the distribution of the matter between the source and us (the observer)
Using Monte Carlo simulation, we have confirmed that we can reproduce the values of input shears after measuring the shear from the images that are composed from high resolution images by Hubble Space Telescope by adding estimated noise and point spread function of the Hyper Suprime Cam camera.

Report

(5 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (3 results)

All 2015 2014 Other

All Int'l Joint Research (1 results) Presentation (2 results)

  • [Int'l Joint Research] スタンフォード大学/カリフォルニア大学バークレー校/カリフォルニア工科大学(米国)

    • Related Report
      2015 Annual Research Report
  • [Presentation] HSCにおける弱い重力レンズ効果とPOLARBEAR CMB偏光観測における重力レンズ効果のクロスコリレーション(II)2015

    • Author(s)
      入江郁也
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      大阪市立大学(大阪府大阪市)
    • Year and Date
      2015-09-25
    • Related Report
      2015 Annual Research Report
  • [Presentation] HSCにおける弱い重力レンズ効果とPOLARBEAR CMB偏光観測における重力レンズ効果のクロスコリレーション2014

    • Author(s)
      片山伸彦
    • Organizer
      物理学会
    • Place of Presentation
      佐賀大学
    • Year and Date
      2014-09-18 – 2014-09-21
    • Related Report
      2014 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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