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2018 Fiscal Year Annual Research Report

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

Research Project

Project/Area Number 18H01259
Research InstitutionNational Astronomical Observatory of Japan

Principal Investigator

サヌエザ パトリシオ  国立天文台, アルマプロジェクト, 特任研究員 (70769348)

Project Period (FY) 2018-04-01 – 2021-03-31
KeywordsMolecular Clouds / ALMA / High-Mass Star Formation / IMF
Outline of Annual Research Achievements

As planned, during the first fiscal year we focused on the data quality assurance and calibration. The observations of the 3 fields assigned to the Japanese team (and East Asia team) had no particular problem and data calibration was smooth.

We have already started the preparation of science products and early analysis. We have made a classification of the brightest IR-dark cores based on the presence of hot core lines and outflow emission. We have discovered some high-mass prestellar candidates, which are particularly important for testing theories of high-mass star formation. We have also found complex filamentary structures that define hub-like systems. These findings have been presented in conferences and analysis techniques and tools that will be used have been published in articles.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

The data verification and calibration was carried out on time as expected. While preparing the enhanced data and science-ready products, scientific discussion is going on.

Early results have been presented in conferences and analysis plans have been successfully applied in other projects, guaranteeing success once they are applied in ALMA-IMF (prestellar-protostellar distinction and filaments analysis).

Strategy for Future Research Activity

During this second fiscal year we will make enhanced data products by applying self-calibration to the observed mosaics. We will continue the preparation of the first publication from the Japanese team. We will first focus on the G10.62 field that shows a complex network of filaments and over 50 cores. The analysis will be supported by observations of the magnetic field.

  • Research Products

    (6 results)

All 2019 2018

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (3 results)

  • [Journal Article] Massive and low-mass protostars in massive "starless" cores2019

    • Author(s)
      Pillai, Thushara; Kauffmann, Jens; Zhang, Qizhou; Sanhueza, Patricio; Leurini, Silvia; Wang, Ke; Sridharan, T. K.; Konig, Carsten
    • Journal Title

      Astronomy & Astrophysics (A&A)

      Volume: 622 Pages: 54 - 64

    • DOI

      10.1051/0004-6361/201732570

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Filamentary Accretion Flows in the Infrared Dark Cloud G14.225-0.506 Revealed by ALMA2019

    • Author(s)
      Chen, Huei-Ru Vivien; Zhang, Qizhou; Wright, M. C. H.; Busquet, Gemma; Lin, Yuxin; Liu, Hauyu Baobab; Olguin, F. A.; Sanhueza, Patricio; Nakamura, Fumitaka; Palau, Aina; Ohashi, Satoshi; Tatematsu, Ken’ichi; Liao, Li-Wen
    • Journal Title

      The Astrophysical Journal (ApJ)

      Volume: 875 Pages: 24 - 46

    • DOI

      10.3847/1538-4357/ab0f3e

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Infall Signatures in a Prestellar Core Embedded in the High-mass 70 μm Dark IRDC G331.372-00.1162018

    • Author(s)
      Contreras, Yanett; Sanhueza, Patricio; Jackson, James M.; Guzman, Andres E.; Longmore, Steven; Garay, Guido; Zhang, Qizhou; Nguyn-Lu'o'ng, Quang; Tatematsu, Ken'ichi; Nakamura, Fumitaka; Sakai, Takeshi; Ohashi, Satoshi; Liu, Tie; Saito, Masao; Gomez, Laura; Rathborne, Jill; Whitaker, Scott
    • Journal Title

      The Astrophysical Journal (ApJ)

      Volume: 861 Pages: 14 - 22

    • DOI

      10.3847/1538-4357/aac2ec

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ALMA-IMF: ALMA transforms our view of the origin of stellar masses III2019

    • Author(s)
      Sanhueza, Patricio; Benjamin, Wu
    • Organizer
      Japan Astronomical Society (ASJ) Meeting
  • [Presentation] ALMA-IMF: ALMA transforms our view of the origin of stellar masses I2018

    • Author(s)
      Sanhueza, Patricio; Nakamura, Fumitaka
    • Organizer
      Japan Astronomical Society (ASJ) Meeting
  • [Presentation] ALMA-IMF: ALMA transforms our view of the origin of stellar masses II2018

    • Author(s)
      Benjamin, Wu; Sanhueza, Patricio
    • Organizer
      East-Asian ALMA Science Workshop

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Published: 2019-12-27  

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