ALMA-IMF: ALMA Transforms the View of the Origin of Stellar Masses

2019 年度 実績報告書

• 研究課題/領域番号: 18H01259
• 研究機関: 国立天文台
• 研究代表者: サヌエザ パトリシオ 国立天文台, アルマプロジェクト, 特任助教 (70769348)
• 研究分担者: 中村 文隆 国立天文台, 科学研究部, 准教授 (20291354)
• 研究期間 (年度): 2018-04-01 – 2021-03-31
• キーワード: High-Mass Star Formation / Molecular Clouds / ALMA / IMF

研究実績の概要

As planned, during the second fiscal year we focused on the enhanced data products. Self-calibration has been performed for all fields in both the 12 and 7 m array observations. Continuum images are finished and currently used for the first science articles.

The first paper from the Japanese team is nearly finished, including magnetic field observations. The PI of the project and the hired postdoc have published several articles related to ALMA-IMF and presented in several conferences and workshops, including a public talk.

現在までの達成度 (区分)

2: おおむね順調に進展している

理由

The enhanced data products (self-calibration) were produced on time as expected. Analysis of the data has been done simultaneously. In addition to working on the paper focused on G10.62, the PI and the hired postdoc have been analyzing different algorithms for source extraction. The source extraction is key for the final goal of the project, produce the core mass function (CMF) for all fields in the survey.

Early results have been presented in conferences and analysis plans have been successfully applied in other projects, producing several papers (one as first author for the KAKENHI PI and another one as PI for the hired postdoc, and several other articles as co-authors).

今後の研究の推進方策

During the final fiscal year we will make the data cubes. All major spectral lines will be imaged. It is the plan to prepare and release to the astronomical community the continuum and line cubes used in the first publication. The first articles from the whole international team will be published. Our Japanese team will focus on the study of the G10.62 region as a first publication.

備考

Benjamin Wu gave a public talk to general public in the Tokyo Space Cafe, Tokyo, Japan. "Dude Where's my Rover? Deep Learning for Planetary Rover Exploration"

研究成果

• [雑誌論文] Large-scale Molecular Gas Distribution in the M17 Cloud Complex: Dense Gas Conditions of Massive Star Formation? (2020)
  • 著者名/発表者名: Nguyen-Luong, Quang; Nakamura, Fumitaka; Sugitani, Koji; Shimoikura, Tomomi; Dobashi, Kazuhito; Kinoshita, Shinichi W.; Kim, Kee-Tae; Kang, Hyunwoo; Sanhueza, Patricio; Evans, Neal J., II; White, Glenn J.
  • 雑誌名: The Astrophysical Journal 巻: 891 ページ: 66 - 80
  • DOI: 10.3847/1538-4357/ab700a
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Effect of Feedback of Massive Stars in the Fragmentation, Distribution, and Kinematics of the Gas in Two Star-forming Regions in the Carina Nebula (2020)
  • 著者名/発表者名: Rebolledo, David; Guzman, Andres E.; Contreras, Yanett; Garay, Guido; Medina, S. -N. X.; Sanhueza, Patricio; Green, Anne J.; Castro, Camila; Guzman, Viviana; Burton, Michael G.
  • 雑誌名: The Astrophysical Journal 巻: 891 ページ: 113 - 138
  • DOI: 10.3847/1538-4357/ab6d76
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] GMC Collisions as Triggers of Star Formation. VII. The Effect of Magnetic Field Strength on Star Formation (2020)
  • 著者名/発表者名: Wu, Benjamin; Tan, Jonathan C.; Christie, Duncan; Nakamura, Fumitaka
  • 雑誌名: The Astrophysical Journal 巻: 891 ページ: 168 - 190
  • DOI: 10.3847/1538-4357/ab77b5
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] The ALMA Survey of 70 um Dark High-mass Clumps in Early Stages (ASHES). I. Pilot Survey: Clump Fragmentation (2019)
  • 著者名/発表者名: Sanhueza, Patricio; Contreras, Y.; Wu, Benjamin; Jackson, J. M.; Guzman, A. E.; Zhang, Q.; Li, S.; Lu, X.; Silva, A.; Izumi, N.; Liu, T.; Miura, R. E.; Tatematsu, K.; Sakai, T.; Beuther, H.; Garay, G.; Ohashi, S.; Saito, M.; Nakamura, F.; Saigo, K., Veena, V. S.; Nguyen-Luong, Q.; Tafoya, D.
  • 雑誌名: The Astrophysical Journal 巻: 886 ページ: 102 - 130
  • DOI: 10.3847/1538-4357/ab45e9
  • 査読あり / オープンアクセス / 国際共著
• [雑誌論文] Nobeyama 45 m mapping observations toward the nearby molecular clouds Orion A, Aquila Rift, and M17: Project overview (2019)
  • 著者名/発表者名: Nakamura, Fumitaka; Ishii, Shun; Dobashi, Kazuhito; Shimoikura, Tomomi; Shimajiri, Yoshito; Kawabe, Ryohei; Tanabe, Yoshihiro; Hirose, Asha; Oyamada, Shuri; Urasawa, Yumiko; Takemura, H.; Tsukagoshi, T.; Momose, M.; Sugitani, K.; Nishi, R.; Okumura, S.; Sanhueza, Patricio; Nguyen-Luong, Q.; Kusune, T.
  • 雑誌名: Publications of the Astronomical Society of Japan 巻: 71 ページ: 1 - 28
  • DOI: 10.1093/pasj/psz057
  • 査読あり / オープンアクセス / 国際共著
• [学会発表] The ALMA Survey of 70 um Dark High-mass Clumps in Early Stages (ASHES) (2020)
  • 著者名/発表者名: Sanhueza, Patricio
  • 学会等名: ALMA-J Seminar, NAOJ
  • 招待講演
• [学会発表] Magnetic Fields in High-Mass Star Forming Regions: G10.62-0.38 (2020)
  • 著者名/発表者名: Wu, Benjamin; Sanhueza, Patricio; Nakamura, Sanhueza
  • 学会等名: East Asian ALMA Science Workshop, Taipei, Taiwan
  • 国際学会
• [学会発表] The ALMA Survey of 70 um Dark High-mass Clumps in Early Stages (ASHES) (2020)
  • 著者名/発表者名: Sanhueza, Patricio; Wu, Benjamin; Nakamura, Fumitaka
  • 学会等名: East Asian ALMA Science Workshop, Taipei, Taiwan
  • 国際学会 / 招待講演
• [学会発表] Tips for ALMA Proposals (2020)
  • 著者名/発表者名: Sanhueza, Patricio
  • 学会等名: ALMA Users Meeting, NAOJ
  • 招待講演
• [学会発表] The Inception of Massive Stars in a Dynamic, Magnetized Interstellar Medium (2019)
  • 著者名/発表者名: Wu, Benjamin; Sanhueza, Patricio
  • 学会等名: Kavli IPMU Seminar
  • 招待講演
• [学会発表] High-mass Star Formation (2019)
  • 著者名/発表者名: Sanhueza, Patricio; Wu, Benjamin
  • 学会等名: Universidad de Barcelona, Spain
  • 国際学会 / 招待講演
• [学会発表] A Comprehinsive Study of High-mass Star-forming Regions (2019)
  • 著者名/発表者名: Sanhueza, Patricio
  • 学会等名: ARC Science Meeting, NAOJ
  • 招待講演
• [学会発表] MHD Simulations of Star Cluster-Forming Clumps (2019)
  • 著者名/発表者名: Wu, Benjamin; Sanhueza, Patricio
  • 学会等名: Workshop on Cluster Formation and Dust Formation, Kiyosato, Japan
  • 招待講演
• [学会発表] Cloudy with a chance of massive stars: Connecting star cluster formation with its environment (2019)
  • 著者名/発表者名: Wu, Benjamin; Sanhueza, Patricio; Nakamura, Fumitaka
  • 学会等名: Laboratoire d'Astrophysique de Bordeaux Seminar, Bordeaux, France
  • 国際学会 / 招待講演
• [学会発表] Magnetic Fields in High-Mass Star Forming Regions: The Case of G10.62-0.38 (2019)
  • 著者名/発表者名: Wu, Benjamin; Sanhueza, Patricio; Nakamura, Fumitaka
  • 学会等名: ALMA Science Meeting 2019, Cagliari, Italy
  • 国際学会
• [学会発表] Cloud Computing for Computing Clouds: Machine learning applications from space exploration to star formation (2019)
  • 著者名/発表者名: Wu, Benjamin
  • 学会等名: ALMA-J Seminar, NAOJ
  • 招待講演