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Sub-parsec structure of ISM revealed by the AKARI all-sky atlas and star-formation activities

Research Project

Project/Area Number 18H01250
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 16010:Astronomy-related
Research InstitutionThe University of Tokyo

Principal Investigator

土井 靖生  東京大学, 大学院総合文化研究科, 助教 (70292844)

Co-Investigator(Kenkyū-buntansha) 川田 光伸  国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (50280558)
Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Granted (Fiscal Year 2022)
Budget Amount *help
¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords星形成 / 星間物質フィラメント / 星間磁場 / 星間フィラメント構造 / 星 / 磁場
Outline of Annual Research Achievements

前年度に続き、ペルセウス座分子雲中の星形成領域NGC1333のフィラメント構造と星間磁場の関係について、解析を進めた。星形成領域内で、星間磁場が個々のフィラメントに対し一様な相対角で分布する様子を明らかにした。この分布は、フィラメントと磁場とが互いに垂直な関係を保ちつつ、各フィラメントが観測者に対しそれぞれ異なった見込み角で分布すると考えると良く説明される。これらの内容を現在投稿論文にまとめた。(その後2020年7月に出版された。)
また、フィラメントとその周囲の磁場構造との関係に加え、フィラメント内部の磁場構造を解明することを試みた。フィラメント内部の磁場構造については、これまでその詳細を明らかにした例は存在しない。我々の観測したデータを分析し、我々はダストの偏光輻射によりトレースされるフィラメント構造が、ダストの全輻射で見たフィラメント構造よりも細くなる傾向を明らかにした。ここから以下の事実が明らかとなる。
1. 濃いフィラメント中では一般にダスト輻射の偏光度は低下する。これは主に濃い分子雲中で外部の星からの輻射が遮蔽されることにより、分子雲中のダストの整列度が低下するためと解釈された来た。しかしながら我々の観測結果から、濃い分子雲中でもダストは良く整列していることが示唆される。
2. フィラメント形成時の物質収縮時に周囲の磁場がフィラメント中心部へ向けて引き込まれると、磁場はフィラメントに対しピンチ構造を持つと期待される(Tomisaka 2015)。我々の観測した細い偏光輻射フィラメントは、このピンチ構造の磁場を斜め方向から観測したとすると良く説明出来る。
Tomisaka(2015)の物理モデルと我々の観測結果を比較することで、フィラメント内の物質分布と磁場強度に具体的な制限を付けられる可能性がある。

Current Status of Research Progress
Current Status of Research Progress

3: Progress in research has been slightly delayed.

Reason

フィラメント構造と磁場との比較により、フィラメント構造形成に関する理解が大きく進んだ。この点については当初の計画よりも大幅に進展していると言える。一方で「あかり」の広域観測データから求められるフィラメント構造の大局分布やその磁場との関わり、時間発展などの議論はまだこれからであり、今後この点についても重点的に進める必要がある。

Strategy for Future Research Activity

ペルセウス座領域のフィラメント内の磁場構造について、物理モデルと比較し、フィラメント内の物質分布や磁場強度についての制限を付けることを目指す。これはこれまで明らかとなっていないフィラメント形成時に於ける磁場の果たし得る役割について直接の制限を付ける重要な研究となる可能性がある。
更にはペルセウス座分子雲周囲のより密度の低い星間ガス中の磁場構造について、可視偏光データとPlanck偏光データとの比較により明らかにし、低密度領域から高密度領域に至る磁場構造の発展を統一的に明らかにする。
ペルセウス座に加え、牡牛座分子雲等の近傍分子雲のフィラメント構造の特性を「あかり」データと他のカタログデータとの比較から明らかにし、我々がペルセウス座分子雲について得た知見の一般性を明らかにすることを目指す。

Report

(2 results)
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(45 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (12 results) Journal Article (21 results) (of which Int'l Joint Research: 15 results,  Peer Reviewed: 21 results,  Open Access: 11 results) Presentation (12 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Int'l Joint Research] Universite de Montreal/National Research Council Canada/Queen’s University(カナダ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] East Asian Observatory(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Central Lancashire(英国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University Road(アイルランド)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Universidade do Porto(ポルトガル)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Eotvos Lorand University(ハンガリー)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Universite de Montreal(カナダ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] East Asian Observatory(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Academia Sinica(その他の国・地域)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Jeremiah Horrocks Institute(英国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Thermal emission from the amorphous dust: An alternative possibility of the origin of the anomalous microwave emission2020

    • Author(s)
      M. Nashimoto, M. Hattori, R. G. Santos, and F. Poidevin
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 72-1 Pages: 6-6

    • DOI

      10.1093/pasj/psz124

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Galactic foreground of gamma-ray bursts from AKARI Far-Infrared Surveyor2019

    • Author(s)
      Toth L Viktor、Doi Yasuo、Zahorecz Sarolta、Pinter Sandor、Racz Istvan I、Bagoly Zsolt、Balazs Lajos G、Horvath Istvan、Kiss Csaba、Kovacs Timea、Onishi Toshikazu
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71 Pages: 10-10

    • DOI

      10.1093/pasj/psy123

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] JCMT BISTRO Survey: Magnetic Fields within the Hub-filament Structure in IC 51462019

    • Author(s)
      Wang Jia-Wei、Lai Shih-Ping、Eswaraiah Chakali et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 876 Pages: 42-42

    • DOI

      10.3847/1538-4357/ab13a2

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The JCMT BISTRO Survey: The magnetic field in the starless core rho Ophiuchus C2019

    • Author(s)
      Liu, J., Qiu, K., Berry, D., Francesco, J. D., et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 877 Pages: 43-43

    • DOI

      10.3847/1538-4357/ab0958

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] SCOPE: SCUBA-2 Continuum Observations of Pre-protostellar Evolution ? survey description and compact source catalogue2019

    • Author(s)
      Eden D J、Liu Tie、Kim Kee-Tae、他
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 485 Pages: 2895-2908

    • DOI

      10.1093/mnras/stz574

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The JCMT BISTRO Survey: The Magnetic Field of the Barnard 1 Star-forming Region2019

    • Author(s)
      Coude Simon、Bastien Pierre、Houde Martin、Sadavoy Sarah、... Tomisaka Kohji、...、The B-fields In STar-forming Regions Observations (BISTRO) Collaboration
    • Journal Title

      The Astrophysical Journal

      Volume: 877 Pages: 42-42

    • DOI

      10.3847/1538-4357/ab1b23

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Investigation of the origin of the anomalous microwave emission in lambda Orionis2019

    • Author(s)
      Bell, A. C., Onaka, T., Galliano, F., Ronin, W., Doi, Y., Kaneda, H., Ishihara, D., and Giard, M.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71

    • DOI

      10.1093/pasj/psz110

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mid-infrared spectroscopy of zodiacal emission with AKARI/IRC2019

    • Author(s)
      Takahashi Aoi、Ootsubo Takafumi、Matsuhara Hideo、Sakon Itsuki、Usui Fumihiko、Chihara Hiroki
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71

    • DOI

      10.1093/pasj/psz095

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] AKARI/IRC near-infrared asteroid spectroscopic survey: AcuA-spec2019

    • Author(s)
      Usui Fumihiko、Hasegawa Sunao、Ootsubo Takafumi、Onaka Takashi
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71

    • DOI

      10.1093/pasj/psy125

    • NAID

      120006604633

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] AKARI mid-infrared slit-less spectroscopic catalogue2019

    • Author(s)
      Yamagishi Mitsuyoshi、Yamamura Issei、Mizuki Toshiyuki、Ootsubo Takafumi、Baba Shunsuke、Usui Fumihiko、Onaka Takashi
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71

    • DOI

      10.1093/pasj/psy132

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A kilometre-sized Kuiper belt object discovered by stellar occultation using amateur telescopes2019

    • Author(s)
      Arimatsu K.、Tsumura K.、Usui F.、Shinnaka Y.、Ichikawa K.、Ootsubo T.、Kotani T.、Wada T.、Nagase K.、Watanabe J.
    • Journal Title

      Nature Astronomy

      Volume: 3 Pages: 1-1

    • DOI

      10.1038/s41550-018-0685-8

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A First Look at BISTRO Observations of the ρ Oph-A core2018

    • Author(s)
      Kwon, Jungmi; Doi, Yasuo; Tamura, Motohide; Matsumura, Masafumi; Pattle, Kate; Berry, David; Sadavoy, Sarah; Matthews, Brenda C.; Ward-Thompson, Derek; Hasegawa, Tetsuo; Furuya, Ray S.; Pon, Andy; Di Francesco, James; Arzoumanian, Doris; Tsukamoto, Yusuke et.al
    • Journal Title

      The Astrophysical Journal,

      Volume: 859 Pages: 4-26

    • DOI

      10.3847/1538-4357/aabd82

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Magnetic Fields toward Ophiuchus-B Derived from SCUBA-2 Polarization Measurements2018

    • Author(s)
      Soam, Archana; Pattle, Kate; Ward-Thompson, Derek; Lee, Chang Won; Sadavoy, Sarah; Koch, Patrick M.; Kim, Gwanjeong; Kwon, Jungmi; Kwon, Woojin; Arzoumanian, Doris; Berry, David; Hoang, Thiem; Tamura, Motohide; Lee, Sang-Sung; Liu, Tie; Tsukamoto, Yusuke et.al
    • Journal Title

      The Astrophysical Journal

      Volume: 861 Pages: 65-65

    • DOI

      10.3847/1538-4357/aac4a6

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Metal pollution of low-mass Population III stars through accretion of interstellar objects like ‘Oumuamua2018

    • Author(s)
      Tanikawa Ataru , Suzuki Takeru K , Doi Yasuo
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 70 Pages: 80-80

    • DOI

      10.1093/pasj/psy075

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] AKARI mid-infrared slitless spectroscopic survey of star-forming galaxies at z < 0.52018

    • Author(s)
      Ohyama Y.、Wada T.、Matsuhara H.、Takagi T.、Malkan M.、Goto T.、Egami E.、Lee H.-M.、Im M.、Kim J.H.、Pearson C.、Inami H.、Oyabu S.、Usui F.、Burgarella D.、Mazyed F.、Imanishi M.、Jeong W.-S.、Miyaji T.、Diaz Tello J.、Nakagawa T.、Serjeant S.、Takeuchi T. T.、Toba Y.、White G. J.、Hanami H.、Ishigaki T.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 618

    • DOI

      10.1051/0004-6361/201731470

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Revised wavelength and spectral response calibrations for AKARI near-infrared grism spectroscopy: Post-cryogenic phase2018

    • Author(s)
      Baba Shunsuke、Nakagawa Takao、Usui Fumihiko、Yamagishi Mitsuyoshi、Onaka Takashi
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71

    • DOI

      10.1093/pasj/psy131

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Near-infrared CO Absorption Band as a Probe to the Innermost Part of an AGN-obscuring Material2018

    • Author(s)
      Baba Shunsuke、Nakagawa Takao、Isobe Naoki、Shirahata Mai
    • Journal Title

      The Astrophysical Journal

      Volume: 852 Pages: 83-83

    • DOI

      10.3847/1538-4357/aa9f25

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] MIRIS Paα Galactic Plane Survey. I. Comparison with IPHAS Hα in ? = 96°?116°2018

    • Author(s)
      Kim Il-Joong、Pyo Jeonghyun、Jeong Woong-Seob、Seon Kwang-Il、Nakagawa Takao、Kim Min Gyu、Park Won-Kee、Lee Dae-Hee、Lee Dukhang、Moon Bongkon、Park Sung-Joon、Park Youngsik、Matsumoto Toshio、Han Wonyong
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 238 Pages: 28-28

    • DOI

      10.3847/1538-4365/aae080

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Near-infrared Polarimetry of the Outflow Source AFGL 6366S: Detection of Circular Polarization2018

    • Author(s)
      Kwon Jungmi、Nakagawa Takao、Tamura Motohide、Hough James H.、Kandori Ryo、Choi Minho、Kang Miju、Cho Jungyeon、Nakajima Yasushi、Nagata Tetsuya
    • Journal Title

      The Astronomical Journal

      Volume: 156 Pages: 1-1

    • DOI

      10.3847/1538-3881/aac389

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First Near-infrared Imaging Polarimetry of Young Stellar Objects in the Circinus Molecular Cloud2018

    • Author(s)
      Kwon, J., Nakagawa, T., Tamura, M., Hough, J. H., Choi, M., Kandori, R., Nagata, T., Kang, M.
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 234 Pages: 42-42

    • DOI

      10.3847/1538-4365/aaa0cc

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] MIRIS observation of near-infrared diffuse Galactic light2018

    • Author(s)
      Onishi Yosuke、Sano Kei、Matsuura Shuji、Jeong Woong-Seob、Pyo Jeonghyun、Kim Il-Jong、Seo Hyun Jong、Han Wonyong、Lee DaeHee、Moon Bongkon、Park Wonkee、Park Younsik、Kim MinGyu、Matsumoto Toshio、Matsuhara Hideo、Nakagawa Takao、Tsumura Kohji、Shirahata Mai、Arai Toshiaki、Ienaka Nobuyuki
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 70 Pages: 76-76

    • DOI

      10.1093/pasj/psy070

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Multiscale Magnetic Field Structure in and around the Perseus Molecular Cloud2021

    • Author(s)
      Yasuo Doi and the BISTRO team
    • Organizer
      International Astronomical Union Symposium 360 Astronomical Polarimetry 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 星形成領域 NGC 1333 の磁場構造2019

    • Author(s)
      土井 靖生(東大総文), BISTRO チーム
    • Organizer
      日本天文学会2019年春季年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 星形成領域 NGC 1333 の磁場構造 II2019

    • Author(s)
      土井 靖生(東大総文), BISTRO チーム
    • Organizer
      日本天文学会2019年秋季年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Composition of cometary ice and dust revealed through SPICA mid- and far-infrared spectroscopy2019

    • Author(s)
      Takafumi Ootsubo
    • Organizer
      SPICA2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 星形成領域 NGC 1333 の磁場構造2019

    • Author(s)
      土井 靖生(東大総文), BISTRO チーム
    • Organizer
      日本天文学会2019年春季年会、法政大学(東京都)
    • Related Report
      2018 Annual Research Report
  • [Presentation] GLADE-AKARI/FIS 近傍銀河カタログ:開口測光・SED フィット2019

    • Author(s)
      諸隈 佳菜、大坪 貴文 (ISAS/JAXA)、土井 靖生 (東京大学)、竹内 努 (名古屋大学)、植田 稔也 (デン バー大学)
    • Organizer
      日本天文学会2019年春季年会、法政大学(東京都)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 短周期彗星の中間赤外線スペクトルにみられるケイ酸塩鉱物以外の未同定フィーチャ2019

    • Author(s)
      大坪貴文
    • Organizer
      第35回 Grain Formation Workshop, 石垣市(沖縄県)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Comets, asteroids and interplanetary dust as seen in near- to far-infrared with AKARI2018

    • Author(s)
      Ootsubo, Takafumi; Ishihara, Daisuke; Hasegawa, Sunao; Pyo, Jeonghyun; Usui, Fumihiko; Kawakita, Hideyo; Mueller, Thomas; Ali-Lagoa, Victor; Takahashi, Aoi; Takaba, Sachi
    • Organizer
      42nd COSPAR Scientific Assembly, in Pasadena, California, USA
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 「あかり」遠赤外線全天画像がとらえた小惑星ダストバンドの形成過程2018

    • Author(s)
      大坪 貴文 (ISAS/JAXA), 臼井 文彦 (神戸大CPS), 土井 靖生 (東大総合文化), 他あかりチーム
    • Organizer
      日本惑星科学会2018年秋季講演会、旭川市科学館(北海道)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Mid-infrared observations of cometary silicate dust2018

    • Author(s)
      Takafumi Ootsubo
    • Organizer
      DUSTY VISIONS 2018, Madrid, Spain
    • Related Report
      2018 Annual Research Report
  • [Presentation] Estimating the formation region of the cometary nuclei based on the infrared observations of cometary dust2018

    • Author(s)
      Takafumi Ootsubo, Yoshiharu Shinnaka, Hideyo Kawakita, Mitsuhiko Honda, and Jun-ichi Watanabe
    • Organizer
      The 11th meeting on Cosmic Dust, Sagamihara, Japan
    • Related Report
      2018 Annual Research Report
  • [Presentation] 彗星起源のCO+CO2およびケイ酸塩ダストの近中間赤外線分光観測2018

    • Author(s)
      大坪貴文
    • Organizer
      ALMAワークショップ:円盤から太陽系へ
    • Related Report
      2018 Annual Research Report
    • Invited

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Published: 2018-04-23   Modified: 2022-07-01  

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