2016 Fiscal Year Final Research Report
Weak-gravitational lensing analysis of subhalos in galaxy clusters for revealing its mass function and statistical properties
| Project/Area Number |
26800097
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Astronomy
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 光赤外天文学 / 弱い重力レンズ効果 / 銀河団 / 暗黒物質 / 宇宙論 / X線天文学 |
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| Outline of Final Research Achievements |
Galaxy clusters are the largest object in the universe. High mass density and clumpy structure, namely subhalos, exist in galaxy clusters. The subhalo masses can be measured by weak-gravitational lensing analysis, and physical properties for hot gas in clusters are by X-ray observations. Our studies based on this funding reveals the following main results. 1) X-ray follow-up observation discovered hot gas associated with subhalos previously discovered by weak-lensing analysis and found a stripping feature. 2) Mass profile for dark subhalo associated with a giant, central elliptical galaxy and the entire region are measured by joint weak-lensing and stellar kinematics analysis. 3) Giant synchrotron radio emission traces the projected mass distribution for one merging cluster.
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| Free Research Field |
天文学
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