Understanding the accretion phase of star formation
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- Machida Masahiro
- Principal Investigator
- 九州大学
About this project
- Japan Grant Number
- JP17K05387
- Funding Program
- Grants-in-Aid for Scientific Research
- Funding organization
- Japan Society for the Promotion of Science
- Project/Area Number
- 17K05387
- Research Category
- Grant-in-Aid for Scientific Research (C)
- Allocation Type
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- Multi-year Fund
- Review Section / Research Field
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- Science and Engineering > Mathematics and Physics > Astronomy > Astronomy
- Research Institution
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- Kyushu University
- Project Period (FY)
- 2017-04-01 〜 2022-03-31
- Project Status
- Completed
- Budget Amount*help
- 4,420,000 Yen (Direct Cost: 3,400,000 Yen Indirect Cost: 1,020,000 Yen)
Research Abstract
Using numerical simulations, the growth of circumstellar disk and jet driving mechanism in the main accretion phase were unveiled. The size growth of the circumstellar disk is suppressed due to magnetic braking outside the disk. However, since the gas accretion onto the disk steadily occurs, the disk becomes gravitationally unstable with time. Then, the disk mass suddenly falls onto the protostar with non-axisymmetric gravitational torque. Then, the disk becomes stable against the self-gravity of the disk. In addition, a part of the falling gas is ejected from the central region as the protostellar jet. This study have shown that the mass accretion onto the protostar and mass ejection by the jet episodically occur in the main accretion phase.
Keywords
Details 詳細情報について
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- CRID
- 1040000781965578880
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- Text Lang
- ja
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- Data Source
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- KAKEN