Studying the structure and dynamics in face-on high mass accretion systems by ALMA
| Project/Area Number |
15K17613
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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 | Yamaguchi University (2016-2017)
National Astronomical Observatory of Japan (2015) |
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Principal Investigator |
Motogi Kazuhito 山口大学, 大学院創成科学研究科, 助教(テニュアトラック) (10722803)
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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 |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 大質量星形成 / 電波干渉計 / ジェット/アウトフロー / 降着円盤 / 電波天文学 / ALMA |
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| Outline of Final Research Achievements |
This research intend to search and resolve the face-on high mass protostars, that are suitable target for direct imaging of the innermost accretion disk. We first detected five candidate of such face-on object by using the ATCA. We, next, performed a pilot-imaging observation using the ALMA long baseline towards the high mass protostellar object G353.273+0.641, which is the best candidate of a face-on object found in our ATCA survey. We successfully resolved compact accretion disk of 250 AU radius. This is the first spatially resolved view of the high mass accretion system in nearly face-on geometry. The disk showed highly anisotropic distribution of a surface density. Such a structure probably reflects the gravitational instability caused by mass accumulation via accretion flow from a surrounding molecular envelope found by CH3OH lines. This is the first detection of such a highly self-gravitating disk system in high mass star-formation.
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Report
(4 results)
Research Products
(39 results)
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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] The shortest periodic and flaring flux variability of a methanol maser emission at 6.7 GHz in G 014.23-00.502017
Author(s)
Sugiyama, Koichiro; Nagase, Katsura; Yonekura, Yoshinori; Momose, Munetake; Yasui, Yasutaka; Saito, Yu; Motogi, Kazuhito; Honma, Mareki; Hachisuka, Kazuya; Matsumoto, Naoko; Uchiyama, Mizuho; Fujisawa, Kenta
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Journal Title
Publications of the Astronomical Society of Japan
Volume: in press
Related Report
Peer Reviewed
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[Journal Article] ALMA Band 8 Continuum Emission from Orion Source I2016
Author(s)
Hirota, Tomoya; Machida, Masahiro N.; Matsushita, Yuko; Motogi, Kazuhito; Matsumoto, Naoko; Kim, Mi Kyoung; Burns, Ross A.; Honma, Mareki
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Journal Title
The Astrophysical Journal
Volume: 833
Issue: 2
Pages: 238-243
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] The discovery of new AGN candidates within the field of Fermi unassociated γ-ray sources2016
Author(s)
Fujinaga, Yoshitaka; Niinuma, Kotaro; Kimura, Atsushi; Fujisawa, Kenta; Oyama, Tomoaki; Mizuno, Syota; Kono, Yusuke; Takemura, Shinji; Sawada-Satoh, Satoko; Akutagawa, Kengo; Sugiyama, Koichiro; Motogi, Kazuhito; Fukuzaki, Yoshihiro
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Journal Title
Publications of the Astronomical Society of Japan
Volume: 未定
Issue: 5
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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