| Project/Area Number |
20740116
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
OTA Kazuaki The Institute of Physical and Chemical Research, 牧島宇宙放射線研究室, 基礎科学特別研究員 (20462666)
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| Project Period (FY) |
2008 – 2009
|
| Project Status |
Completed (Fiscal Year 2009)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 可視光天文学 / 観測的宇宙論 / 高赤方偏移銀河 / 銀河形成 / 銀河進化 / 観測天文学 / 銀河団 / 初期宇宙 / 撮像・分光 |
|---|
| Research Abstract |
We compared volume and mass of the redshift z=6 (900 million years after the Big Bang) galaxy proto-cluster candidates we found with those of galaxy clusters at z<6 to examine how such physical properties have changed until today (z=0, 13.7 billion year after the Big Bang). We found that the z=6 proto-cluster has a larger volume but the masses are comparable. This implies that this z=6 object could be a progenitor and evolve to be a galaxy cluster seen in the present-day universe, assembling the mass toward the smaller volume. Also, our result suggests that the structure formation was already in a matured phase and formation of galaxy clusters were taking place even at the epoch as early as the 900 million year universe.
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