| Budget Amount *help |
¥23,530,000 (Direct Cost: ¥18,100,000、Indirect Cost: ¥5,430,000)
Fiscal Year 2012: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2011: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2010: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2009: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
|
|---|
| Research Abstract |
The first stars in the universe were formed from the primordial pristine gas, made only of hydrogen, helium and trace light elements.How massive were those stars is crucial for subsequent structure formation. Starting from the initial condition obtained by cosmological simulation, we carried out radiation hydrodynamical calculation for the first star formation. We found that when the protostar becomes 40 times more massive than the Sun, the emitted UV radiation becomes so intense that the ambient material is pushed outward, terminating accretion onto the star.The final stellar mass is set at this moment. Although this value of the first star's mass is lower than previously considered by theoretical arguments, it is in accordance with observation of the abundance ratio of low-metallicity stars in the Galactic halo.
|
