| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Research Abstract |
The central engine of long-duration gamma-ray bursts has not been clarified yet. A system composed of a black hole and an accretion torus is promising candidate of their engine. Based on the latest observations and theoretical evolution models of massive stellar cores, I developed a hypothesis that the progenitor star of gamma-ray bursts should have higher entropy than ordinary supernova. By performing numerical relativity simulations, I studied the collapse of the higher entropy cores and clarified the dynamics of the black hole formation. Based on the simulation results, I showed that the properties of long-duration gamma-ray busts can be explained if the progenitor core has higher entropy as I assumed in the hypothisis.
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