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Shirai Kei  白井 慶

Researcher Number 90870519
Other IDs
  • ORCIDhttps://orcid.org/0000-0001-5661-3541
Affiliation (Current) 2025: 神戸大学, 理学研究科, 技術員
Affiliation (based on the past Project Information) *help 2022 – 2024: 神戸大学, 理学研究科, 技術員
2020 – 2021: 神戸大学, 理学研究科, 特命技術員
Review Section/Research Field
Except Principal Investigator
Medium-sized Section 17:Earth and planetary science and related fields
Keywords
Except Principal Investigator
カタストロフィック破壊 / フラッシュX線 / 衝突破壊強度 / 水星核 / 鉄隕石 / 分化溶融微惑星 / 惑星形成過程 / M型小惑星 / 水星コア / 天体衝突 … More / 鉄隕石母天体 / トモグラフィー / 衝突破壊 / 母天体 / カタストロフック破壊 / 層構造天体 / 衝突破壊・再集積 / 小惑星母天体 / 熱進化 / 衝突実験 / 小惑星族 / デジタル画像相関法 / ラブルパイル天体 / 再集積 / 熱進化天体 / 微惑星 / 小惑星 Less
  • Research Projects

    (2 results)
  • Research Products

    (18 results)
  • Co-Researchers

    (6 People)
  •  Origin of an extra-large metallic core of Mercury and M-type asteroids inferred from differentiation process between iron and rock at the region of terrestrial planets

    • Principal Investigator
      荒川 政彦
    • Project Period (FY)
      2022 – 2025
    • Research Category
      Grant-in-Aid for Scientific Research (A)
    • Review Section
      Medium-sized Section 17:Earth and planetary science and related fields
    • Research Institution
      Kobe University
  •  Study of collisional disruption by using the ultra-high speed X-ray tomography and implication for the diversity of asteroid families

    • Principal Investigator
      Masahiko Arakawa
    • Project Period (FY)
      2019 – 2021
    • Research Category
      Grant-in-Aid for Scientific Research (A)
    • Review Section
      Medium-sized Section 17:Earth and planetary science and related fields
    • Research Institution
      Kobe University

All 2024 2022 2021 2020

All Journal Article Presentation

  • [Journal Article] Preservation of pristine materials under impact craters formed on comet nuclei2024

    • Author(s)
      Sasai Haruka、Arakawa Masahiko、Yasui Minami、Shirai Kei
    • Journal Title

      Icarus

      Volume: 411 Pages: 115929-115929

    • DOI

      10.1016/j.icarus.2023.115929

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22K18281, KAKENHI-PROJECT-22H00179, KAKENHI-PROJECT-23K25927
  • [Journal Article] Effect of boulder size on ejecta velocity scaling law for cratering and its implication for formation of tiny asteroids2022

    • Author(s)
      Okawa Hatsune、Arakawa Masahiko、Yasui Minami、Hasegawa Sunao、Toda Mizuno、Shirai Kei、Yamamoto Yuya
    • Journal Title

      Icarus

      Volume: 387 Pages: 115212-115212

    • DOI

      10.1016/j.icarus.2022.115212

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-22K18281, KAKENHI-PROJECT-21K18654, KAKENHI-PLANNED-17H06459, KAKENHI-PROJECT-22H00179
  • [Journal Article] Effect of projectile shape and interior structure on crater size in strength regime2022

    • Author(s)
      Kadono T.、Arakawa M.、Tsujido S.、Yasui M.、Hasegawa S.、Kurosawa K.、Shirai K.、Okamoto C.、Ogawa K.、Iijima Y.、Shimaki Y.、Wada K.
    • Journal Title

      Earth, Planets and Space

      Volume: 74 Issue: 1 Pages: 131-131

    • DOI

      10.1186/s40623-022-01690-7

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K03955, KAKENHI-PROJECT-21K18660, KAKENHI-PROJECT-18KK0092, KAKENHI-PROJECT-19H00726, KAKENHI-PLANNED-17H06459, KAKENHI-PROJECT-22H00179
  • [Journal Article] Size of particles ejected from an artificial impact crater on asteroid 162173 Ryugu2021

    • Author(s)
      Wada K.、Ishibashi K.、Kimura H.、Arakawa M.、Sawada H.、Ogawa K.、Shirai K.、Honda R.、Iijima Y.、Kadono T.、Sakatani N.、Mimasu Y.、Toda T.、Shimaki Y.、Nakazawa S.、Hayakawa H.、Saiki T.、Takagi Y.、Imamura H.、Okamoto C.、Hayakawa M.、Hirata N.、Yano H.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 647 Pages: A43-A43

    • DOI

      10.1051/0004-6361/202039777

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19K03955, KAKENHI-PROJECT-18KK0128, KAKENHI-PLANNED-17H06459, KAKENHI-PUBLICLY-19H05085, KAKENHI-PROJECT-19H00719, KAKENHI-PUBLICLY-21H00052
  • [Journal Article] Resurfacing processes on asteroid (162173) Ryugu caused by an artificial impact of Hayabusa2's Small Carry-on Impactor2021

    • Author(s)
      Honda Rie、Arakawa Masahiko、Shimaki Yuri、Shirai Kei、Yokota Yasuhiro、Kadono Toshihiko、Wada Koji、et al.
    • Journal Title

      Icarus

      Volume: 366 Pages: 114530-114530

    • DOI

      10.1016/j.icarus.2021.114530

    • Peer Reviewed / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-18K03723, KAKENHI-PUBLICLY-21H00052, KAKENHI-PROJECT-19H00719, KAKENHI-PROJECT-19H00727, KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-19K03955, KAKENHI-PROJECT-21K18654, KAKENHI-PROJECT-17KK0097, KAKENHI-PROJECT-18KK0128, KAKENHI-PLANNED-17H06459
  • [Journal Article] Impact Experiment on Asteroid (162173) Ryugu: Structure beneath the Impact Point Revealed by In Situ Observations of the Ejecta Curtain2020

    • Author(s)
      Kadono Toshihiko、Arakawa Masahiko、Honda Rie、Ishibashi Ko、Ogawa Kazunori、Sakatani Naoya、Sawada Hirotaka、Shimaki Yuri、Shirai Kei、Sugita Seiji、Wada Koji
    • Journal Title

      The Astrophysical Journal

      Volume: 899 Issue: 1 Pages: L22-L22

    • DOI

      10.3847/2041-8213/aba949

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19K03955, KAKENHI-PUBLICLY-19H05086, KAKENHI-PLANNED-17H06459, KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-19H00719
  • [Journal Article] An artificial impact on the asteroid 162173 Ryugu formed a crater in the gravity-dominated regime2020

    • Author(s)
      Arakawa, M., Saiki, T., Wada, K., Ogawa, K., Kadono, T., Shirai, K., Sawada, H., Ishibashi, K., Honda, R., Sakatani, N., Iijima, Y., Okamoto, C., Yano, H., Takagi, Y., Hayakawa, M., Michel, P., Jutzi, M., Shimaki, Y., Kimura, S., Mimasu, Y., Toda, T., Imamura, H., Nakazawa, S., Hayakawa, H., Sugita, S., et al.
    • Journal Title

      Science

      Volume: 368 Issue: 6486 Pages: 67-71

    • DOI

      10.1126/science.aaz1701

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-18K03723, KAKENHI-PROJECT-19K03955, KAKENHI-PROJECT-19K14778, KAKENHI-PROJECT-17K05639, KAKENHI-PROJECT-19K03958, KAKENHI-PROJECT-17KK0097, KAKENHI-PROJECT-18KK0128, KAKENHI-ORGANIZER-17H06454, KAKENHI-PLANNED-17H06459, KAKENHI-PUBLICLY-20H04607, KAKENHI-PROJECT-16H06349, KAKENHI-PROJECT-19H00727, KAKENHI-PROJECT-20H00194, KAKENHI-PROJECT-18K11610, KAKENHI-PUBLICLY-19H05086, KAKENHI-PROJECT-19H00719
  • [Presentation] Impact Strength of Porous- and Ductile-Rocky Planetesimals in Gravity Dominated Regime2022

    • Author(s)
      Arakawa, M., Nagano, T., Ishida, S., Yasui, M., Shirai, K., Hasegawa, S.
    • Organizer
      53rd Lunar and Planetary Science Conference
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] Post Shock Heat Induced by High Velocity Impact on Porous Icy Bodies2022

    • Author(s)
      Sasai, H., Yasui, M., Arakawa, M., Shirai, K.
    • Organizer
      53rd Lunar and Planetary Science Conference
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] 層構造試料を用いた衝突破壊実験:デジタル画像相関法による衝突破片速度分布の計測法の開発2021

    • Author(s)
      石田紗那,荒川政彦,保井みなみ,白井慶,堀川和洋
    • Organizer
      JpGU2021
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] 氷微惑星上の高速衝突により発生する衝突残留熱の定量的評価2021

    • Author(s)
      笹井遥,荒川政彦,保井みなみ,白井慶
    • Organizer
      日本惑星科学会2021年秋季講演会
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] Artificial impact crater on Ryugu formed in the gravity dominated regime2021

    • Author(s)
      M. Arakawa, K. Wada, K. Ogawa, T. Kadono, K. Shirai, K. Ishibashi, R. Honda, N. Sakatani, Y. Shimaki
    • Organizer
      7th IAA Planetary Defense Conference
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] High velocity impact experiments on porous ice aggregates simulating cometary nuclei surface: Measurements of post shock temperature around impact crater2021

    • Author(s)
      Sasai, H., Yasui, M., Arakawa, M., Shirai, K.
    • Organizer
      52nd Lunar and Planetary Science Conference
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] 層構造含水微惑星の模擬物質への衝突実験:デジタル画像相関法による標的内部の粒子速度分布の計測2021

    • Author(s)
      石田紗那,荒川政彦,保井みなみ,白井慶,長谷川直,長野巧,堀川和洋
    • Organizer
      日本惑星科学会2021年秋季講演会
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] 小惑星衝突時の運動量輸送に関する実験的研究2021

    • Author(s)
      堀川和洋,荒川政彦,保井みなみ,白井慶,長谷川直
    • Organizer
      JpGU2021
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] 彗星核を模擬した多孔質氷に対する高速度衝突実験:衝突残留熱へのエネルギー分配率2021

    • Author(s)
      笹井遥,保井みなみ,荒川政彦,白井慶
    • Organizer
      JpGU2021
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] Resurfacing processes on asteroid (162173) Ryugu caused by an artificial impact of Hayabusa2’s Small Carry-on Impactor2020

    • Author(s)
      Arakawa, M., Honda, R., Yokota, Y., Shimaki, Y., Shirai, K., Kadono, T., Wada, K., Ogawa, K., Ishibashi, K., Sakatani, N., Yasui, M., Morota, T., Kameda, S., Tatsumi, E., Yamada, M., Kouyama, T., Cho, Y., Matsuoka, M., Suzuki, H., Honda, C., Hayakawa, M., Yoshioka, K., Sawada, H., Sugita, S., Hirata, N., Hirata, N.
    • Organizer
      52nd Meeting of the AAS Division for Planetary Sciences
    • Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19H00719
  • [Presentation] 多孔質氷天体を模擬したクレーター形成実験:衝突残留熱の計測2020

    • Author(s)
      笹井遥,荒川政彦,保井みなみ,白井慶
    • Organizer
      日本惑星科学会2020年度秋季講演会(会津)
    • Data Source
      KAKENHI-PROJECT-19H00719
  • 1.  Masahiko Arakawa (10222738)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 13 results
  • 2.  保井 みなみ (30583843)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 10 results
  • 3.  長谷川 直 (10399553)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 3 results
  • 4.  小川 和律 (40509824)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 2 results
  • 5.  小林 浩 (40422761)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 6.  WADA Koji
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 5 results

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