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

2015 Fiscal Year Final Research Report

• Project/Area Number: 24654074
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The 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
• 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.

Free Research Field

素粒子物理学実験