Developing cosmological analysis method for muti-wavelength data and exploring the dark Universe
| Project/Area Number |
26610058
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Takada Masahiro 東京大学, カブリ数物連携宇宙研究機構, 教授 (40374889)
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| Co-Investigator(Renkei-kenkyūsha) |
HIKAGE Chiaki 東京大学, カブリ数物連携宇宙研究機構, 特任助教 (00623555)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | ダークエネルギー / ダークマター / ニュートリノ / 宇宙の構造形成 |
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| Outline of Final Research Achievements |
We developed a cosmological analysis method that can be done by jointly combining measurements of galaxy clustering and gravitational weak lensing that are measured from galaxy imaging and spectroscopic surveys, respectively. This joint method allows us to calibrate out galaxy bias uncertainty, which is otherwise one of the major uncertainties in either of the two observables alone. We then applied this method to the dataset from the Sloan Digital Sky Survey, and derived constraints on cosmological parameters. In particular we showed the constraint on a parameter that is sensitive to gravity theory on cosmological scales. Moreover, we developed a method combining the number counts and gravitational lensing effects for galaxy clusters that are most massive, gravitationally-bound objects in the universe.
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Report
(4 results)
Research Products
(52 results)
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[Presentation] Connecting Halo (peak) and Galaxy2016
Author(s)
Masahiro Takada
Organizer
Statistics of Extrema in Large-Scale Structure
Place of Presentation
Leiden University, Leiden, the Netherlands
Year and Date
2016-03-07
Related Report
Int'l Joint Research / Invited
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[Presentation] SuMIRe: Subaru imaging and spectroscopic galaxy surveys2016
Author(s)
Masahiro Takada
Organizer
Cross-correlation Spectacular with LSST: Exploring Synergies Between LSST and External Datasets to Discover Fundamental Physics
Place of Presentation
Brookhaven National Lab & Stony Brook University, Stony Brook, USA
Related Report
Int'l Joint Research / Invited
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[Presentation] Halo bias2015
Author(s)
Masahiro Takada
Organizer
Cosmology and First Light
Place of Presentation
Istitut Astrophsique de Paris, Paris, France
Year and Date
2015-12-07
Related Report
Int'l Joint Research / Invited
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