| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2011: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2010: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2008: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
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| Research Abstract |
We have critically addressed the detectability of WHIM (Warm-Hot Intergalactic Medium), which is supposed to be the most plausible candidate for cosmic dark baryon. Our various analysis played an important role in the Japan-US-Holland joint proposal of a space mission ORIGIN, which unfortunately was not accepted. We plan , however, to submit the proposal DIOS for an up-coming Japanese small space mission program.We also constructed a detailed model for the intracluster gas. In particular, we were successful in modeling the inhomogeneity of gas density and temperature of galaxy clusters statistically. Then we pointed out a systematic error in the estimate of the Hubble constant using clusters. Finally we also considered the validity of hydrostatic equilibrium, which has been conventionally assumed in analyzing the X-ray data of galaxy clusters. Our results based on a set of simulated clusters indicates that the assumption leads to approximately20 percent discrepancy from the true mass of clusters.
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