2015 Fiscal Year Final Research Report
Feasibility Study of a Direct Measurement of Dark Matter Distribution in Galaxy-Clusters
| Project/Area Number |
25400237
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Rikkyo University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 銀河団 / ダークマター / マイクロカロリメータ / 重力赤方偏移 |
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| Outline of Final Research Achievements |
The soft X-ray spectrometer (SXS) on board ASTRO-H, which had been launched on 17 Feb. 2016, opened a new research field with its extremely high energy-resolution for diffuse extended celestial objects. In this work, we investigated a completely new method for estimation of dark-matter distribution in galaxy-clusters, which is a measurement of the spatial distribution of gravitational red shift, by computer simulations with a realistic response function of the SXS. We concluded that a reasonable observation could make the new method to be possible. Also, we took part in the pre-flight function test and the calibration of the SXS. We confirmed that SXS achieved the high energy-resolution less than 5eV (FWHM) in flight operation.
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| Free Research Field |
数物系科学、天文学
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