2014 Fiscal Year Final Research Report
Toward understanding the initial conditions of star formation using realistic magnetohydrodynamics simulations
| Project/Area Number |
23740154
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Astronomy
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| Research Institution | National Astronomical Observatory of Japan (2013-2014)
Aoyama Gakuin University (2011-2012) |
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Principal Investigator |
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Keywords | 星形成 / 磁気流体力学 / 衝撃波 |
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| Outline of Final Research Achievements |
Using three-dimensional, realistic, magneto-hydrodynamics simulations, we studied star formation mechanism in our universe. The important findings obtained in this work are as follows: 1) Molecular clouds that are the site of star formation are found to be formed by accretion of interstellar atomic clouds. In addition, we showed that accretion of clumpy atomic clouds, which are formed as a consequence of thermal instability, is an important driver of supersonic turbulence in molecular clouds, and atomic gas component of turbulent gas dominate the dynamics of molecular clouds and controls star formation. 2) Intensive molecular cloud collision and resulting gas compression/magnetic field amplification is found to be a triggering mechanism of massive star formation in our galaxy. 3) Structure formation due to thermal instability is found to be playing impotent roles in particle acceleration in young supernova remnants and star cluster formation in the first galaxy.
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| Free Research Field |
理論天体物理学
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