Equilibrium of Rotating Strongly Magnetized Star and Abrupt Energy Release
| Project/Area Number |
16540256
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Hiroshima University |
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Principal Investigator |
KOJIMA Yasufumi Hiroshima University, Graduate School of Science, Professor (10192577)
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| Project Period (FY) |
2004 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,870,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2004: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | neutron star / relativity / plasma / MHD |
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| Research Abstract |
The magnetic fields and stellar rotation are very important for the burst on relativistic stars. The purpose of this research project is to clarify the electromagnetic field structure around the strongly magnetized stars and to clarify the propagation and transmission of energy from the interior of the star to external magnetosphere, where plasma may be accelerated by the reconnection of magnetic field or some other mechanism and the energy is eventually transformed to radiation. Propagation and the transmission of Alfven waves in strongly magnetized stars are examined. It is found that the displacement currents and stellar rotation are complicatedly coupled, and hence are very important in magnetically dominated regime.
A new numerical code to solve electromagnetic fields and plasma motion has developed. Axially symmetry and two component fluids are assumed. This code is different from MHD approximation, and can be used even for electrically dominated case. The preliminary results are obtained and the numerical code is now applied to realistic case: construction of pulsar magnetosphere and a model of gamma ray repeaters.
Some new results are published for related topics for neutron stars. They are magnetic field decay, constraints on the equation of states for neutron star interior from some observations, resonant pulsation due to external gravitational waves, gyro motion in tidal gravity, and nonlinear growth of bar instability of rotating stars.
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Report
(5 results)
Research Products
(32 results)
