A study of nuclear starburst with the use of new star-formation rate estimator
| Project/Area Number |
15K05035
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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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| Research Collaborator |
Ando Ryo
Kohno Kotaro
Izumi Takuma
Imanishi Masatoshi
Saito Toshiki
Miura Rie E.
Bendo George
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 爆発的星形成 / 銀河 / 電波 / 天文学 / 爆発的星形成銀河 |
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| Outline of Final Research Achievements |
The aim of this observation study was characterize intensity, spatial structure, and environment of starburst region in the center of galaxies. ALMA observations toward nearby starburst galaxies successfully detected millimeter and sub-millimeter radio recombination lines and demonstrated that the lines were powerful tool to capture star-formation activity. Dust continuum emission and molecular gas emission lines were observed simultaneously in unprecedented spatial resolution. The observations uncovered star-forming clumps having diverse nature and diverse evolutionary phases in the heart of starburst galaxies.
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| Academic Significance and Societal Importance of the Research Achievements |
従来の望遠鏡による観測では難しかったスターバースト銀河の中心部での星形成活動の分布や星間物質の性質を細かく詳しく調べることが、新しい望遠鏡による観測によって可能であることを実証した点に本研究の意義がある。本研究で得られた成果は、スターバースト銀河の中心部が一様ではなく複雑で多様性に富む場所であること、その多様性の正体や起源を解き明かすことがスターバーストの発生メカニズム解明の手がかりになるであろうことを示唆しており、スターバースト研究にひとつの新しい局面を開いた点にも意義がある。
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Report
(5 results)
Research Products
(21 results)
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[Presentation] ALMA imaging of NGC 253 nuclear starburst and anticipation of future high resolution observations2017
Author(s)
K.Nakanishi, R.Ando, K.Kohno, K.Sorai, N.Nakai N.Kuno, K.Matsubayashi, H.Sugai, T.Izumi, S.Martin, N.Harada, S.Takano, T.Tosaki, T.Nakajima, Y.Nishimura, Y.Tamura
Organizer
ALMA Long Baseline Workshop
Related Report
Int'l Joint Research
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[Presentation] 5pc分解能で見た近傍星形成銀河NGC253中心部の星形成活動の多様性2016
Author(s)
安藤亮, 河野孝太郎, 田村陽一, 泉拓磨, 谷口暁星, 中西康一郎, 原田ななせ, 高野秀路, 中島拓, 徂徠和夫, 中井直正, 久野成夫, 菅井肇, 松林和也
Organizer
日本天文学会秋季年会
Place of Presentation
愛媛大学(愛媛県松山市)
Related Report
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[Presentation] Five Parsec View of the Diverse Starburst Activities in the Heart of NGC2532016
Author(s)
Ryo Ando, Kotaro Kohno, Yoichi Tamura, Takuma Izumi, Akio Taniguchi, Koichiro Nakanishi, Nanase Harada, Shuro Takano, Taku Nakajima, Tomoka Tosaki, Kazuo Sorai, Naomasa Nakai, Nario Kuno, Hajime Sugai, Kazuya Matsubayashi
Organizer
Half a Decade of ALMA: Cosmic Dawns Transformed
Place of Presentation
Renaissance Indian Wells Resort & Spa Indian Wells, CA, USA
Related Report
Int'l Joint Research
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