| Project/Area Number |
16H07086
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Astronomy
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| Research Institution | Kagoshima University |
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Principal Investigator |
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| Project Period (FY) |
2016-08-26 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 連星系形成 / ALMA望遠鏡 / 電波天文学 / 連星形成 / アルマ望遠鏡 |
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| Outline of Final Research Achievements |
To understand how twin stars orbiting around each other, binaries, form, we have performed Atacama Large Millimeter / submillimeter Array (ALMA) observations of circumbinary disks of molecular gas and dusts in protostellar binaries. We found that in the protostellar binary L1551 NE the circumbinary disk consists of two-arm features, and the materials in the circumbinary disk is being accreted onto the protostellar binary. ALMA observations of another protostellar binary, L1551 IRS 5, on the other hand, do not reveal such arm-like structures in the circumbinary disk. These results imply that mass accretion onto the protostellar binary should depend on the binary mass ratio and the centrifugal radii of the circumbinary disk.
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