2011 Fiscal Year Final Research Report
Study of Dark Energy by Utilizing Galaxy Distributions
| Project Area | Probing the Dark Energy through an Extremely Wide & Deep Survey with Subaru Telescope |
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| Project/Area Number |
18072004
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MATSUBARA Takahiko 名古屋大学, 基礎理論研究センター, 准教授 (00282715)
YOSHIDA Naoki 東京大学, 数物連携宇宙研究機構, 准教授 (90377961)
TAKAHASHI Ryuichi 弘前大学, 大学院・理工学研究科, 助教 (60413960)
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| Project Period (FY) |
2006 – 2011
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| Keywords | ダークエネルギー / 構造形成 / 密度ゆらぎ / 宇宙大規模構造 |
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| Research Abstract |
We utilize galaxy distributions to reveal the time evolution of dark energy, which is the biggest mystery of modern cosmology. For that, we carried out huge numerical simulations and obtained one of the biggest galaxy samples in the world. Using our galaxy sample, we solve trajectories of the light ray in the simulation box, which are suffered from the gravitational lensing effect caused by dark matter distributions. We could estimate future observational errors of parameters to determine dark energy time evolution by these ray-tracing simulations, and propose an optimal observational strategy. These data are open for public.
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