Star Formation Study Based on Polarization and Radiation Transfer: Role of Interstellar Magnetic Field
| Project/Area Number |
15K05032
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
町田 正博 九州大学, 理学研究院, 准教授 (10402786)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 星間磁場 / 偏波 / 星形成 / 磁気流体力学 / フィラメント / 圧力平衡 / 重力安定性 / 偏光・偏波 / 観測的可視化 |
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| Outline of Final Research Achievements |
Combining Herschel Space Observatory far infrared observations and interstellar polarization observations, it is shown molecular clouds are formed by ensembles of filaments which are perpendicularly threaded by the magnetic field. We obtained the magnetohydrostatic configuration and their maximum stable line-mass as a function of the magnetic flux per unit mass. Stability of such filament is studied with magnetohydrodynamical simulations. There exists the shortest wavelength above which the filament undergoes the gravitational instability (critical wavelength). The most unstable mode has a wavelength twice as long as the critical wavelength. The filament fragments with the most unstable wavelength and experiences runaway collapse as long as the gas is isothermal and forms a pseudo-disk which extends in the direction perpendicular to the magnetic field.
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Report
(4 results)
Research Products
(42 results)
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[Journal Article] Distortion of Magnetic Fields in a Starless Core: Near-infrared Polarimetry of FeSt 1-4572017
Author(s)
Kandori, R., Tamura, M., Kusakabe, N., Nakajima, Y., Kwon, J., Nagayama, T., Nagata, T., Tomisaka, K., Tatematsu, K.
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Journal Title
The Astrophysical Journal
Volume: 845
Issue: 1
Pages: 32-32
DOI
NAID
Related Report
Peer Reviewed / Open Access
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[Journal Article] Disk-driven rotating bipolar outflow in Orion Source I2017
Author(s)
10.Hirota, T. *, Machida, M. N., Matsushita, Y., Motogi, K., Matsumoto, N., Kim, M. K., Burns, R. A., Honma, M.
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Journal Title
Nature Astronomy
Volume: 1
Issue: 7
Pages: 0146-0146
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] ALMA Observations of the Transition from Infall Motion to Keplerian Rotation around the Late-phase Protostar TMC-1A2015
Author(s)
Aso, Yusuke; Aso, Yusuke; Ohashi, Nagayoshi; Saigo, Kazuya; Koyamatsu, Shin; Aikawa, Yuri; Hayashi, Masahiko; Machida, Masahiro N.; Saito, Masao; Takakuwa, Shigehisa; Tomida, Kengo; Tomisaka, Kohji; Yen, Hsi-Wei
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Journal Title
Astrophysical Journal
Volume: 812
Issue: 1
Pages: 27-27
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Serpens Main の ALMA Cycle 3 観測：ミリ波で見る進化段階2017
Author(s)
麻生有佑 , 平野尚美, 大橋永芳 , 西合一矢 , 齋藤正雄, 富阪幸治, 相川祐理, 高桑繁久, 富田賢吾, 町田正博, YEN Hsi-Wei, Jonathan P. WILLIAMS
Organizer
日本天文学会2017年秋季年会
Related Report
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[Presentation] ALMA による Class I 原始星 L1489 IRS の観測 II: 歪んだ円盤構造2017
Author(s)
崔仁士, 大橋永芳, 西合一矢, 松本倫明, 高桑繁久, 齋藤正雄, 麻生有佑 , 相川祐理 , 黒瀬一平, Hsi-Wei Yen, 富阪幸治, 富田賢吾, 町田正博
Organizer
日本天文学会2017年秋季年会
Related Report
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