2014 Fiscal Year Final Research Report
Cosmology from weak gravitational lensing of Cosmic Microwave Background
| Project/Area Number |
25887033
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-08-30 – 2015-03-31
|
| Keywords | 宇宙マイクロ波背景輻射 / 重力レンズ |
|---|
| Outline of Final Research Achievements |
Weak lensing effect on the cosmic microwave background (CMB), which has been recently detected from multiple experiments, will be one of the important cosmological probes in the near future. In this research project, we develop the method of measuring the weak lensing of CMB. We first improve the lensing estimator constructed from CMB polarization. From the first to the second year, we focus on the application of the CMB lensing analysis to the measurement of the inflationary gravitational wave. In our first step, we explore whether we can detect the lensing signals from a patchwork of polarization maps observed from ground-based CMB experiments, and then, using this lensing signals, we show the effectiveness of the delensing for LiteBIRD observation. In addition, we explore future detectability of the gravitational-wave induced lensing from high-sensitivity CMB experiments.
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| Free Research Field |
観測的宇宙論
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