| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
The two best known black hole binary states are the low/hard and high/soft states. The low/hard state is dominated by hard Comptonised emission from a hot, optically thin flow whereas the high/soft state is instead dominated by soft, blackbody emission from a cool, optically thick disk. To understand what makes the transition is the key issue to understand important parameters which determine the emission efficiency. Especially the very high state (VHS) is the key to understand the transition since it is the intermediate state between the high state and the low state. We developed a physical model for the accretion flow structure in the VHS, in which both thermal and non-thermal electrons are taken into account. Then we fit good VHS data observed with Suzaku, and found that the disk is truncated in the VHS and the corona can be understand with fully non-thermal electrons.
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