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Toward Understanding of role of magnetic field in the process of star formation

Research Project

Project/Area Number 24244017
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionNational Astronomical Observatory of Japan

Principal Investigator

Nakamura Fumitaka  国立天文台, 理論研究部, 准教授 (20291354)

Co-Investigator(Kenkyū-buntansha) 高野 秀路  日本大学, 工学部, 准教授 (00222084)
小川 英夫  大阪府立大学, 理学(系)研究科(研究院), 教授 (20022717)
土橋 一仁  東京学芸大学, 教育学部, 教授 (20237176)
亀野 誠二  国立天文台, チリ観測所, 教授 (20270449)
松本 倫明  法政大学, 人間環境学部, 教授 (60308004)
伊王野 大介  国立天文台, チリ観測所, 准教授 (60425402)
Project Period (FY) 2012-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥47,710,000 (Direct Cost: ¥36,700,000、Indirect Cost: ¥11,010,000)
Fiscal Year 2016: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2013: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2012: ¥27,040,000 (Direct Cost: ¥20,800,000、Indirect Cost: ¥6,240,000)
Keywords磁場 / 電波観測 / ゼーマン分裂 / 分子雲 / Zeeman観測 / 分子雲コア / 星形成 / 星間雲 / MHDシミュレーション / 星無しコア / 重力収縮 / 数値シミュレーション / 偏波観測
Outline of Final Research Achievements

It remains uncertain how magnetic fields are important in the process of star formation. The main reason is the technical difficulty of the measurements of the field strength. In this study, to derive the magnetic field associated with dense cores, we carried out Zeeman observations of CCS which is abundant in the prestellar phase. As a result, we detected a first clear Zeeman spliting of CCS and derived the field strength of about 200 micro Gauss toward TMC-1.
This suggests that the TMC-1 core is magnetically supported against the gravitational collapse.
For theoretical study, we developed a tool to make polarisation maps with numerical simulation data.

Report

(6 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (33 results)

All 2017 2016 2015 2014 2013 2012

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 3 results,  Acknowledgement Compliant: 3 results) Presentation (24 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results) Funded Workshop (1 results)

  • [Journal Article] First Clear Detection of CCS Zeeman Splitting toward TMC-12017

    • Author(s)
      Fumitaka Nakamura, Seiji Kameno, Izumi Mizuno, Kazuhito Dobashi, Tomomi Shimoikura, Kotomi Taniguchi
    • Journal Title

      Star Formation in Different Environments 2016

      Volume: 1 Pages: 100-100

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Z45: A new 45-GHz band dual-polarization HEMT receiver for the NRO 45-m radio telescope2015

    • Author(s)
      Nakamura F. 他22名
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 67 Issue: 6 Pages: 11719-11719

    • DOI

      10.1093/pasj/psv088

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cluster Formation Triggered by Filament Collisions in Serpens South2015

    • Author(s)
      Nakamura, F.; Tanaka, T.; Awazu, Y 他25名
    • Journal Title

      ASP Conference Series

      Volume: 499 Pages: 239-240

    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] Software Polarization Spectrometer "PolariS"2014

    • Author(s)
      Izumi Mizuno, Seiji Kameno, Kano Amano, Makoto Kuroo, Fumitaka Nakamura, Noriyuki Kawaguchi, Katsunori Shibata, Seisuke Kuji, Nario Kuno
    • Journal Title

      Journal of Astronomical Instrumentation

      Volume: 3 Issue: 03n04

    • DOI

      10.1142/s225117171450010x

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] The software-based polarization spectrometer PolariS2014

    • Author(s)
      Seiji Kameno, Izumi Mizuno, Fumitaka Nakamura, Makoto Kuroo, Amano Kano, Nobuyuki Kawaguchi, Katsunori Shibata, Nario Kuno, Shuro Takano, Seisuke Kuji
    • Journal Title

      Proceedings of SPIE

      Volume: 9153 Pages: 91532D-91532D

    • DOI

      10.1117/12.2055205

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Cluster Formation Triggered by Filament Collisions in Serpens South2014

    • Author(s)
      Fumitaka Nakamura, Koji Sugitani, Takahiro Tanaka, Hiroyuki Nishitani, Kazuhito Dobashi, Tomomi Shimoikura, Yoshito Shimajiri, Ryohei Kawabe, Yoshinori Yonekura, Izumi Mizuno, Kimihiko Kimura, Kazuki Tokuda, Minato Kozu, Nozomi Okada, Yutaka Hasegawa, Hideo Ogawa, Seiji Kameno, Hiroko Shinnaga, Munetake Momose, 他7名
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 791 Issue: 2 Pages: L23-L23

    • DOI

      10.1088/2041-8205/791/2/l23

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] A New 45 GHz Band Receiver with Dual Polarization for NRO 45-m Telescope2013

    • Author(s)
      Tokuda, K.; Kozu, M.; Kimura, K. 他9名
    • Journal Title

      New Trends in Radio Astronomy in the ALMA Era: ASP Conference Series

      Volume: 476 Pages: 403-407

    • Related Report
      2013 Annual Research Report
  • [Journal Article] The CCS 45 GHz Zeeman Project: Magnetic Field Measurements Towards Prestellar Cores2013

    • Author(s)
      Fumitaka Nakamura, Hideo Ogawa, Seiji Kameno他17名
    • Journal Title

      New Trends in Radio Astronomy in the ALMA Era: ASP Conference Series

      Volume: 476 Pages: 239-204

    • Related Report
      2013 Annual Research Report
  • [Presentation] FIrst Clear Detection of CCS Zeeman Splitting in TMC-12016

    • Author(s)
      Fumitaka Nakamura
    • Organizer
      Star Formation in Different Envirnments 2016
    • Place of Presentation
      QuiNhon, Vietnam
    • Year and Date
      2016-07-25
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Are Prestellar Cores Magnetically Subcritical?2016

    • Author(s)
      Fumitaka Nakamura
    • Organizer
      Early Phase of Star Formation 2016
    • Place of Presentation
      Rindberg, Germany
    • Year and Date
      2016-06-27
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Discovery of A Magnetically Subcritical Core2016

    • Author(s)
      Fumitaka Nakamura
    • Organizer
      Star formation, magnetic fields, and diffuse matter in the galaxy
    • Place of Presentation
      university of wisconsin, USA
    • Year and Date
      2016-05-23
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 磁場で支えられた分子雲コアの発見2016

    • Author(s)
      中村文隆 他5名
    • Organizer
      日本天文学会春季年会2016
    • Place of Presentation
      首都大学東京(東京都八王子市)
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] TMC-1におけるCCS分子輝線のゼーマン効果計測検証2016

    • Author(s)
      亀野誠二 他5名
    • Organizer
      日本天文学会春季年会2016
    • Place of Presentation
      首都大学東京(東京都八王子市)
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] ゼーマン効果検出を念頭においたTMC-1周辺のCCS/HC3NのOTF観測2016

    • Author(s)
      土橋一仁 他10名
    • Organizer
      日本天文学会春季年会2016
    • Place of Presentation
      首都大学東京(東京都八王子市)
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] CCSゼーマン観測によるprestellar coreの磁場測定2016

    • Author(s)
      中村文隆
    • Organizer
      偏波・偏光観測によるサイエンス
    • Place of Presentation
      茨城大学(茨城県水戸市)
    • Year and Date
      2016-01-28
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] 偏波観測の戦略と較正方法2016

    • Author(s)
      亀野誠二
    • Organizer
      偏波・偏光観測によるサイエンス
    • Place of Presentation
      茨城大学(茨城県水戸市)
    • Year and Date
      2016-01-26
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] CCS Zeeman Observations toward TMC-12015

    • Author(s)
      Fumitaka Nakamura
    • Organizer
      Star Formation Workshop 2015, From Clouds to Cores
    • Place of Presentation
      国立天文台(東京都三鷹市)
    • Year and Date
      2015-06-29
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of Single Dish Zeeman Observation using ALMA Band-1 Reciever2015

    • Author(s)
      Chau-Chin Chong, Fumitaka Nakamura
    • Organizer
      The 3rd workshop on large aperture mm/submm telescopes in the ALMA era
    • Place of Presentation
      国立天文台三鷹、東京
    • Year and Date
      2015-03-11 – 2015-03-13
    • Related Report
      2014 Annual Research Report
  • [Presentation] Magnetic Fields in Star-Forming Regions2015

    • Author(s)
      Fumitaka Nakamura, , Seiji Kameno, Izumi Mizuno, Kazuhito Dobashi
    • Organizer
      The 3rd workshop on large aperture mm/submm telescopes in the ALMA era
    • Place of Presentation
      国立天文台三鷹、東京
    • Year and Date
      2015-03-11
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Cluster Formation Inuced by Filament Collisions2014

    • Author(s)
      Fumitaka Nakamura, Seiji Kameno, Izumi Mizuno, Kazuhito Dobashi
    • Organizer
      Revolution in Astronomy with ALMA - The Third Year
    • Place of Presentation
      東京国際フォーラム、東京都千代田区
    • Year and Date
      2014-12-08 – 2014-12-11
    • Related Report
      2014 Annual Research Report
  • [Presentation] Cluster Formation Triggered by Cloud-Cloud Collision: The Case of Serpens South2014

    • Author(s)
      Fumitaka Nakamura, Seiji Kameno, Izumi Mizuno, Kazuhito Dobashi
    • Organizer
      Star Formation Across Space and Time
    • Place of Presentation
      Noordwijk, Netherlands
    • Year and Date
      2014-11-11
    • Related Report
      2014 Annual Research Report
  • [Presentation] Revealing the Initial Conditions of Star Cluster Formation: The Case of Serpens South2014

    • Author(s)
      Fumitaka Nakamura, Seiji Kameno, Izumi Mizuno, Kazuhito Dobashi
    • Organizer
      The Early Life of Stellar Clusters: Formation and Dynamics
    • Place of Presentation
      Copenhargen, Denmark
    • Year and Date
      2014-11-03
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] 野辺山45m鏡における40 GHz帯偏波計測システム2014

    • Author(s)
      水野いづみ、亀野誠司、中村文隆、久野成夫、高野修路
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      山形県山形市、山形大学
    • Year and Date
      2014-09-13
    • Related Report
      2014 Annual Research Report
  • [Presentation] 単一鏡電波観測における偏波計測手法2014

    • Author(s)
      水野いずみ
    • Organizer
      日本天文学会春季年会
    • Place of Presentation
      国際基督教大学(東京都)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 野辺山45m鏡45GHz帯新受信機Z45を用いたCCSマッピング観測2013

    • Author(s)
      中村文隆
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      東北大学(宮城県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 野辺山45m電波望遠鏡搭載45GHz受信機(Z45)の試験観測2013

    • Author(s)
      落合哲
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      東北大学(宮城県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 野辺山45 m電波望遠鏡搭載45 GHz受信機(Z45)の開発2013

    • Author(s)
      岡田望
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      東北大学(宮城県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] 野辺山 45 m 電波望遠鏡 45 GHz 帯受信機 (Z45) のアンテナ搭載試験2013

    • Author(s)
      米倉覚則
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      東北大学(宮城県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] ソフトウェア偏波分光計PolariSの開発II2013

    • Author(s)
      水野いづみ
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      東北大学(宮城県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] ソフトウェア偏波分光計PolariSの開発III --- GPUを用いた分光処理2013

    • Author(s)
      亀野誠二
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      東北大学(宮城県)
    • Related Report
      2013 Annual Research Report
  • [Presentation] CCSゼーマン分裂による星なし分子雲コアの磁場強度測定計画2012

    • Author(s)
      中村文隆
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      大分大(大分県)
    • Related Report
      2012 Annual Research Report
  • [Presentation] ソフトウェア偏波分光計PolariSの開発2012

    • Author(s)
      亀野誠二
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      大分大(大分県)
    • Related Report
      2012 Annual Research Report
  • [Funded Workshop] Star Formation 2015: From Clouds to Cores2015

    • Place of Presentation
      国立天文台(東京都三鷹市)
    • Year and Date
      2015-06-29
    • Related Report
      2015 Annual Research Report

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Published: 2013-05-15   Modified: 2019-07-29  

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