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Quantifying the ISM based on GeV gamma-ray and multiwavelength obervations

Research Project

Project/Area Number 17H02866
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionHiroshima University

Principal Investigator

Mizuno Tsunefumi  広島大学, 宇宙科学センター, 准教授 (20403579)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords星間ガス / 宇宙線 / ガンマ線 / 多波長観測
Outline of Final Research Achievements

We have quantified the interstellar medium (ISM) and coscmi-rays (CRs) based on GeV gamma-ray and multiwavelength obervations, as well as studied the CR accelerator data in detail. On the latter we have published a detailed study of the X-ray morphology of VER J2019+368. On the former, we published the analysis of Chamaeleon molecular clouds (in particular the study of non-linearity between the dust emission and ISM density) and high-latitude HI clouds (in particular measurement of ISM density without an assuption of spin temperature). In addition, we have shown that by using HI line profile we can significantly improve the accuracy of ISM/CR measurements. The method has been applied to the MBM 53-55 molecular clouds and Pegasus loop region, and a dedicated paper is in preparation.

Academic Significance and Societal Importance of the Research Achievements

星間空間を満たす星間ガスの定量は、星間現象(超新星爆発、分子雲形成、星形成など)を理解する根幹であり、現代天文学の主要テーマの一つである。星間ガスの測定は伝統的に21cm 線(原子ガス)および2.6mm 線(分子ガス)の電波サーベイによってなされてきたが、factor2 程度の大きな不定性があった。本研究はGeVガンマ線観測というロバストな星間ガスのトレーサーを基軸とした多波長観測により,星間ガスの定量を目指すもので,ダスト放射と星間ガスの非線形性,スピン温度の仮定によらないガスの定量,HI21cm線の輝線幅を用いた精密解析の提唱など多くの成果を上げることができた。

Report

(5 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (30 results)

All 2022 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (25 results) (of which Int'l Joint Research: 10 results)

  • [Int'l Joint Research] Chicago Univ./Stanford Univ.(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] MPE(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Study of the Cosmic Rays and Interstellar Medium in Local H i Clouds Using Fermi-LAT Gamma-Ray Observations2020

    • Author(s)
      Mizuno T.、Abdollahi S.、Fukui Y.、Hayashi K.、Koyama T.、Okumura A.、Tajima H.、Yamamoto H.
    • Journal Title

      The Astrophysical Journal

      Volume: 890 Issue: 2 Pages: 120-120

    • DOI

      10.3847/1538-4357/ab6a99

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fermi-LATγ-Ray Study of the Interstellar Medium and Cosmic Rays in the Chamaeleon Molecular Cloud Complex: A Look at the Dark Gas as Optically Thick H i2019

    • Author(s)
      Hayashi Katsuhiro、Mizuno Tsunefumi、Fukui Yasuo、Okamoto Ryuji、Yamamoto Hiroaki、Hidaka Naoya、Okumura Akira、Tajima Hiroyasu、Sano Hidetoshi
    • Journal Title

      The Astrophysical Journal

      Volume: 884 Issue: 2 Pages: 130-130

    • DOI

      10.3847/1538-4357/ab4351

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] X-Ray Studies of the Extended TeV Gamma-Ray Source VER J2019+3682017

    • Author(s)
      Mizuno T.、Tanaka N.、Takahashi H.、Katsuta J.、Hayashi K.、Yamazaki R.
    • Journal Title

      The Astrophysical Journal

      Volume: 841 Issue: 2 Pages: 104-104

    • DOI

      10.3847/1538-4357/aa7201

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] HI 21cm線プロファイル・ダスト放 射・ガンマ線を用いた,MBM 53- 55分子雲・Pegasus loop領域に おける星間ガスと宇宙線の研究2022

    • Author(s)
      水野恒史ほか
    • Organizer
      日本物理学会春季年会(オンライン)
    • Related Report
      2020 Annual Research Report
  • [Presentation] Cosmic-Ray and Gas Properties in the MBM 53-55 Clouds and the Pegasus Loop as Revealed by HI Line Profiles, Dust, and Gamma-Ray Data2021

    • Author(s)
      T. Mizuno et al.
    • Organizer
      TeVPA 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of the Cosmic Rays and Interstellar Medium in local HI Clouds using Fermi-LAT Gamma-Ray Observations2021

    • Author(s)
      T. Mizuno et al.
    • Organizer
      9th Fermi Symposium
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 宇宙線直接観測とガンマ線観測による近傍宇宙線スペクトルの研究(2)2020

    • Author(s)
      水野恒史ほか
    • Organizer
      日本物理学会秋季年会(オンライン)
    • Related Report
      2020 Annual Research Report
  • [Presentation] 宇宙線直接観測とガンマ線観測による近傍宇宙線スペクトルの研究(1)2020

    • Author(s)
      水野恒史ほか
    • Organizer
      日本物理学会春季年会(オンライン)
    • Related Report
      2019 Annual Research Report
  • [Presentation] フェルミ衛星による太陽系近傍原子雲の宇宙線・星間ガスの研究(3)2019

    • Author(s)
      水野恒史ほか
    • Organizer
      日本物理学会秋季年会(山形大学)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Study of the CRs and ISM in Local HI Clouds using Fermi-LAT Gamma-ray Observations2019

    • Author(s)
      Mizuno, T. et al.
    • Organizer
      TeVPA2019, Sydney, Australia
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of the ISM and CRs in Chamaeleon molecular-cloud complex using the Planck thermal dust optical depth2019

    • Author(s)
      林克洋,水野恒史ほか
    • Organizer
      日本天文学会春季年会(法政大学,東京)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study of the CRs and ISM in Local HI Clouds using Fermi-LAT Gamma-ray Observations2018

    • Author(s)
      水野恒史ほか
    • Organizer
      日本天文学会秋季年会(兵庫県立大学,兵庫)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study of the CRs and ISM in Local HI Clouds using Fermi-LAT Gamma-ray Observations(2)2018

    • Author(s)
      水野恒史ほか
    • Organizer
      日本物理学会秋季年会(信州大学,長野)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study of the Interstellar Medium and Cosmic Rays in Local HI Clouds2018

    • Author(s)
      Mizuno, T. et al.
    • Organizer
      8th Fermi Symposium (Baltimore, USA)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ガンマ線バーストの X 線残光を用いた天の川銀河の星間ガスの評価 (2)2018

    • Author(s)
      小山恭弘,水野恒史ほか
    • Organizer
      日本天文学会秋季年会(兵庫県立大学,兵庫)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study of the Interstellar Gas Distribution of Milky Way Using Gamma-Ray Burst Afterglow2018

    • Author(s)
      Koyama, T., Mizuno, T. et al.
    • Organizer
      New eyes on X-ray astrophysical objects with Japanese-Chinese observatories
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ガンマ線バーストの X 線残光を用いた天の川銀河の星間ガスの評価2018

    • Author(s)
      小山恭弘,水野恒史ほか
    • Organizer
      応用物理・物理系学会中国四国支部合同学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study of the ISM and CRs in nearby molecular cloud regions using gamma rays2018

    • Author(s)
      林克洋,水野恒史ほか
    • Organizer
      宇電懇シンポジウム2018(国立天文台三鷹,東京)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Study of the ISM and CRs in Chamaeleon region using the Planck thermal dust optical depth2018

    • Author(s)
      Hayashi, K., Mizuno, T. et al.
    • Organizer
      8th Fermi Symposium (Baltimore, USA)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of the CRs and ISM in Local HI Clouds using Fermi-LAT Gamma-ray Observations2018

    • Author(s)
      水野恒史ほか
    • Organizer
      日本物理学会春季年会 (東京理科大学,千葉)
    • Related Report
      2017 Annual Research Report
  • [Presentation] Study of the ISM and CRs in MBM 53-55 Clouds and the Pegasus Loop2017

    • Author(s)
      Mizuno T. et al.
    • Organizer
      ICRC 2017 (Busan, South Korea)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of the Interstellar Medium and Cosmic-rays in Local HI Clouds2017

    • Author(s)
      Mizuno T. et al.
    • Organizer
      7th Fermi Symposium (Garmisch-Partenkirchen, Germany)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of the ISM and CRs in MBM 53-55 Clouds and the Pegasus Loop(2)2017

    • Author(s)
      水野恒史ほか
    • Organizer
      日本天文学会秋季年会 (北海道大学,北海道)
    • Related Report
      2017 Annual Research Report
  • [Presentation] Study of the Interstellar Medium Gas and Cosmic Rays using GeV gamma rays2017

    • Author(s)
      水野恒史ほか
    • Organizer
      天の川銀河研究会 (鹿児島大学,鹿児島)
    • Related Report
      2017 Annual Research Report
  • [Presentation] ガンマ線バーストのX線残光を用いた天の川銀河の星間ガスの評価2017

    • Author(s)
      小山恭弘
    • Organizer
      日本天文学会秋季年会(北海道大学,北海道)
    • Related Report
      2017 Annual Research Report
  • [Presentation] ガンマ線バーストのX線残光を用いた天の川銀河の星間ガスの評価2017

    • Author(s)
      小山恭弘
    • Organizer
      天の川銀河研究会 (鹿児島大学,鹿児島)
    • Related Report
      2017 Annual Research Report
  • [Presentation] On the origin of gamma-ray emission toward SNR CTB37A with Fermi-LAT2017

    • Author(s)
      Abdollahi S., Mizuno, T. et al.
    • Organizer
      ICRC 2017 (Busan, South Korea)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On the origin of gamma-ray emission toward SNR CTB 37A with Fermi-LAT2017

    • Author(s)
      Abdollahi S., Mizuno, T. et al.
    • Organizer
      7th Fermi Symposium (Garmisch-Partenkirchen, Germany)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2023-01-30  

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