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J-GLOBAL ID：201401094018211583   Update date: Apr. 12, 2024

Okawa Hirotada

オオカワ ヒロタダ | Okawa Hirotada
Affiliation and department：
Aomori University Faculty of Software and Information Technology

About Aomori University Faculty of Software and Information Technology


Job title： Senior Researcher(Associate Professor)
Research field  (2)： Applied mathematics and statistics ,  Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research keywords  (2)： Computational Science ,  Astrophysics
Research theme for competitive and other funds  (4)：
  • 2023 - 2026 画期的な非線形最適化ソルバーを用いた高密度天体の構造解析
  • 2020 - 2023 General relativistic rotating stars for evolution in the Lagrangian description
  • 2019 - 2022 Theoretical study of the mass and angular momentum distribution of primordial black holes
  • 2017 - 2019 Development of a Novel Numerical Scheme for Multi-dimensional Stellar Evolution Calculations
Papers (70)：
  • Shoichi Yamada, Hiroki Nagakura, Ryuichiro Akaho, Akira Harada, Shun Furusawa, Wakana Iwakami, Hirotada Okawa, Hideo Matsufuru, Kohsuke Sumiyoshi. Physical mechanism of core-collapse supernovae that neutrinos drive. Proceedings of the Japan Academy. Series B, Physical and biological sciences. 2024. 100. 3. 190-233
  • Kei Ichi Maeda, Priti Gupta, Hirotada Okawa. Chaotic von Zeipel-Lidov-Kozai oscillations of a binary system around a rotating supermassive black hole. Physical Review D. 2023. 108. 12
  • Kei-ichi Maeda, Priti Gupta, Hirotada Okawa. Dynamics of a binary system around a supermassive black hole. Physical Review D. 2023. 107. 12
  • Misa Ogata, Hirotada Okawa, Kotaro Fujisawa, Nobutoshi Yasutake, Yu Yamamoto, Shoichi Yamada. A Lagrangian construction of rotating star models. Monthly Notices of the Royal Astronomical Society. 2023. 521. 2. 2561-2576
  • Chul-Moon Yoo, Tomohiro Harada, Hirotada Okawa. Threshold of primordial black hole formation in nonspherical collapse (vol 102, 043526, 2020). PHYSICAL REVIEW D. 2023. 107. 4
ｍore...
MISC (11)：
  • Hirotada Okawa. W4 - a multi-dimensional root-finding method for nonlinear equations. Research Features. 2024. 151. 142-145
  • 岩上わかな, 大川博督, 長倉洋樹, 原田了, 古澤峻, 赤穂龍一郎, 松古栄夫, 住吉光介, 山田章一. 三次元空間における重力崩壊型超新星のボルツマン方程式によるニュートリノ輻射流体計算. 日本天文学会年会講演予稿集. 2021. 2021
  • 原田了, 長倉洋樹, 岩上わかな, 大川博督, 山田章一, 古澤峻, 松古栄夫, 住吉光介. SN法を用いたボルツマン輻射流体コードによる高速回転星の重力崩壊シミュレーション. 日本天文学会年会講演予稿集. 2021. 2021
  • 赤穗龍一郎, 原田了, 長倉洋樹, 住吉光介, 岩上わかな, 大川博督, 古澤峻, 松古栄夫, 山田章一. 一般相対論的ボルツマン輻射流体計算による原子中性子星冷却. 日本天文学会年会講演予稿集. 2021. 2021
  • 小形美沙, 大川博督, 藤澤幸太郎, 安武伸俊, 山田章一. 2次元高速回転星の擬似的進化計算. 日本天文学会年会講演予稿集. 2021. 2021
ｍore...
Lectures and oral presentations  (11)：
  • How to numerically solve Differential Equations?
    (WIAS Home Coming Day 2023)
  • On Time Evolution Scheme in a theory of modified gravity
    (2023)
  • A numerical analysis with the W4 method for the structure of relativistic rotating stars in the Lagrangian formulation
    (2023)
  • Wavelet Analysis
    (Astrophysics group Colloquium 2023)
  • Relativistic rotating stars in the Lagrangian formulation by the W4 method
    (2022)
ｍore...
Works (1)：
  • A new multi-dimensional root finder for a system of nonlinear equations
    Hirotada Okawa 2022 - 現在
Work history (7)：
  • 2021/04 - 現在 Waseda University Institue for Advanced Study
  • 2019/04 - 2021/03 Waseda University Institue for Advanced Study
  • 2018/04 - 2019/03 Waseda University Research Institute for Science and Engineering
  • 2014/07 - 2019/03 Kyoto University Yukawa Institute for Theoretical Physics
  • 2014/07 - 2018/03 Waseda University Research Institute for Science and Engineering
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