| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
We performed three-dimensional magneto-hydrodynamic simulations of galactic gaseous disk due to clarify a mechanism of amplification of galactic magnetic fields. The weak toroidal magnetic fields we assumed initially are amplified by magneto-rotational instability. When the magnetic pressure amplified by MRI became comparable to the gas pressure, magnetic fields are buoyantly rising to the halo region and the ratio of gas pressure to magnetic pressure reached quasi-steady state. We also performed observational visualization using the simulation data. We calculated synchrotron intensity and polarized intensity. The intensity map of GHz-bands traced the magnetic spiral arms inside the galactic disk. On the other hands, halo magnetic fields are observed in MHz-bands.
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