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Formation and alteration of circumstellar dust from coordinated studies of experiments, analysis, and observation

Research Project

Project/Area Number 19H01935
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

Takigawa Aki  東京大学, 大学院理学系研究科(理学部), 准教授 (10750367)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2021: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2019: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywordsダスト / 実験 / 珪酸塩 / 赤外線天文学 / 宇宙塵 / 観測 / 凝縮実験 / 星周ダスト / 星間ダスト
Outline of Research at the Start

本研究では,実験・分析・観測的手法を組み合わせることで,太陽系原材料物質としての星周ダストの形成・変化・変質過程に迫る.非晶質ダストの凝縮実験をおこない,非晶質粒子の組成と赤外スペクトルの関係性を用いて,星周非晶質ダストの再同定を行う.難揮発性ダストであるコランダムの化学反応,変質過程を実験で調べ, そのような変化や変質によってできたリムをもつプレソーラー粒子の分析をおこなう.観測との比較から星周ダストとしてのプレソーラー粒子の特殊性・普遍性を明らかにする.

Outline of Final Research Achievements

For understanding the formation of interstellar and circumstellar dust, we constructed a vacuum apparatus that can simulate condensation of gases of arbitrary composition, control the condensation temperature to room temperature and liquid nitrogen temperature, and perform simultaneous condensation from two electron guns and a resistance heating gas source, and conducted oxide and silicate condensation experiments at room temperature and low temperature. In addition, particulate condensation experiments in the Al-Ca-Fe-Si-Mg-O system were conducted using an induction thermal plasma system. We measured the substrate temperature, calibrated a film thickness gauge to control the condensation rate, added an H2O gas introduction system, conducted condensation experiments using a single gas source and analyzed the condensate, and conducted condensation experiments using multiple gas sources and analyzed the condensate.

Academic Significance and Societal Importance of the Research Achievements

非晶質珪酸塩は星周・星間ダストとして豊富に,また至る所に存在し,これまでに多くの研究があるものの,観測されるダストの特徴を物質科学的に裏付けることが難しく,依然それらの組成や構造はわかっていない.本課題で低温での実験が可能でかつ系統的に組成を変化させられる実験装置を開発し,低温から高温まで幅広い宇宙環境でのダスト形成が実験室で再現できるようになった.これにより,観測から示唆されるダスト放射・吸収の特徴を再現するために必要な非晶質星周・星間ダストの形成条件と組成が推定できるようになると期待され,天文学と鉱物学の境界分野である宇宙鉱物学の発展にとって大きな意義がある.

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (16 results)

All 2023 2022 2021 2019

All Journal Article (10 results) (of which Int'l Joint Research: 8 results,  Open Access: 7 results,  Peer Reviewed: 9 results) Presentation (6 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Journal Article] Nonequilibrium spherulitic magnetite in the Ryugu samples2023

    • Author(s)
      E. Dobrica et al.
    • Journal Title

      Geochimica et Cosmochimica Acta

      Volume: 346 Pages: 65-75

    • DOI

      10.1016/j.gca.2023.02.003

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples2023

    • Author(s)
      Nakamura T.、Matsumoto M.、Amano K.、Enokido Y.、Zolensky M. E.、Mikouchi T.、Genda H.、Tanaka S.、Zolotov M. Y.、Kurosawa K. .. Yabuta H. ... et al.
    • Journal Title

      Science

      Volume: 379 Issue: 6634 Pages: 8671-8671

    • DOI

      10.1126/science.abn8671

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Astrominralogical studies on material circulation in the galaxy2022

    • Author(s)
      TAKIGAWA Aki
    • Journal Title

      Japanese Magazine of Mineralogical and Petrological Sciences

      Volume: 51 Issue: 1 Pages: n/a

    • DOI

      10.2465/gkk.220225

    • ISSN
      1345-630X, 1349-7979
    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] Condensation of cometary silicate dust using an induction thermal plasma system2022

    • Author(s)
      Enju S., Kawano H., Tsuchiyama A., Kim T. H., Takigawa A., Matsuno J., Komaki H.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 661 Pages: A121-A121

    • DOI

      10.1051/0004-6361/202142620

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu2022

    • Author(s)
      Noguchi Takaaki、Matsumoto Toru、Miyake Akira、Igami Yohei、Haruta Mitsutaka、Saito Hikaru、Hata Satoshi、Seto Yusuke、Miyahara Masaaki、Tomioka Naotaka ... Yabuta Hikaru ... et al.
    • Journal Title

      Nature Astronomy

      Volume: 7 Pages: 170-170

    • DOI

      10.1038/s41550-022-01841-6

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Condensation of cometary silicate dust using an induction thermal plasma system2021

    • Author(s)
      Kim T. H.、Takigawa A.、Tsuchiyama A.、Matsuno J.、Enju S.、Kawano H.、Komaki H.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 656 Pages: A42-A42

    • DOI

      10.1051/0004-6361/202141216

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Structural and chemical modifications of oxides and OH generation by space weathering: Electron microscopic/spectroscopic study of hydrogen-ion-irradiated Al2O32021

    • Author(s)
      Igami Yohei、Muto Shunsuke、Takigawa Aki、Ohtsuka Masahiro、Miyake Akira、Suzuki Kohtaku、Yasuda Keisuke、Tsuchiyama Akira
    • Journal Title

      Geochimica et Cosmochimica Acta

      Volume: 315 Pages: 61-72

    • DOI

      10.1016/j.gca.2021.09.031

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Condensation of Glass with Multimetal Nanoparticles: Implications for the Formation Process of GEMS Grains2021

    • Author(s)
      Junya Matsuno, Akira Tsuchiyama, Takayuki Watanabe, Manabu Tanaka, Aki Takigawa, Satomi Enju, Chiyoe Koike ,Hiroki Chihara, Akira Miyake
    • Journal Title

      The Astrophysical Journal

      Volume: 911:47 Issue: 1 Pages: 1-16

    • DOI

      10.3847/1538-4357/abe5a0

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Airfall on Comet 67P/Churyumov?Gerasimenko2021

    • Author(s)
      Davidsson Bjorn J.R.、Birch Samuel、Blake Geoffrey A.、Bodewits Dennis、Dworkin Jason P.、Glavin Daniel P.、Furukawa Yoshihiro、Lunine Jonathan I.、Mitchell Julie L.、Nguyen Ann N.、Squyres Steve、Takigawa Aki、Vincent Jean-Baptiste、Zacny Kris
    • Journal Title

      Icarus

      Volume: 354 Pages: 114004-114004

    • DOI

      10.1016/j.icarus.2020.114004

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Formation of Transition Alumina Dust around Asymptotic Giant Branch Stars: Condensation Experiments using Induction Thermal Plasma Systems2019

    • Author(s)
      Takigawa Aki、Kim Tae-Hee、Igami Yohei、Umemoto Tatsuki、Tsuchiyama Akira、Koike Chiyoe、Matsuno Junya、Watanabe Takayuki
    • Journal Title

      The Astrophysical Journal

      Volume: 878 Issue: 1 Pages: L7-L7

    • DOI

      10.3847/2041-8213/ab1f80

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] An Experimental Study on Evaporation of Silicon Carbide in a Low-Pressure Hydrogen-Water Vapor Gas Mixture2023

    • Author(s)
      Yamamoto D, Takigawa A, Tachibana S
    • Organizer
      54th Lunar and Planetary Science Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Kinetics of Crystallization of Amorphous Alumina and Phase Transition of Gamma-Alumina2023

    • Author(s)
      Kobayashi K, Yamamoto D, Takigawa A, Tachibana S
    • Organizer
      54th Lunar and Planetary Science Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Circumstellar Dust Around Alumina-Rich AGB Stars: Condensation Experiments in the Ca-Al-Si-O and Ca-Al-Si-Fe-O Systems2023

    • Author(s)
      Takigawa A, Hirai K, Tachibana S
    • Organizer
      54th Lunar and Planetary Science Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Chemical Composition of Amorphous Silicate Dust Around Oxygen-Rich AGB Stars: Condensation Experiments Using the Induction Thermal Plasma System2023

    • Author(s)
      Enomoto H, Takigawa A
    • Organizer
      54th Lunar and Planetary Science Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 紀元前太陽系を探る:質量放出星から太陽系への物質進化2019

    • Author(s)
      瀧川晶
    • Organizer
      日本惑星科学会秋季講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Formation of metastable alumina dust around agb stars: Condensation experiments using induction thermal plasma systems.2019

    • Author(s)
      A. Takigawa, T.-H. Kim, Y. Igami, T. Umemoto, A. Tsuchiyama, C. Koike, J. Matsuno, T. Watanabe
    • Organizer
      The 82nd Annual Meeting of the Meteoritical Society
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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