Shusuke Utsumi / 内海秀介

I am a 24-year-old based in Nagoya, and I enjoy astronomy, photography, music, travel, programming, reading, and vintage clothing.

Research

I conduct research in numerical astrophysics within the laboratory for theoretical astronomy and astrophysics at Nagoya University. My work focuses on developing new numerical methods to investigate the formation of Earth-like rocky planets and running simulations that explore novel formation pathways for brown dwarf binaries.

  • Scheme: Central-force SPH, Godunov‑type SPH
  • Language: C++ (with MPI/OpenMP), Python

Publications & Talks

Paper

International Conference

Oral

  • Shusuke Utsumi and Shu-ichiro Inutsuka; "Formation of Brown Dwarfs: An Alternative Scenario", Perspectives in Star Formation — Senior Insights, Young Visions, Shanghai, China, Oct. 2025
  • Shusuke Utsumi and Shu-ichiro Inutsuka; "An Extension of Smoothed Particle Hydrodynamics to Elastic Dynamics: Angular Momentum Conservative Scheme", 10th East Asia Numerical Astrophysics Meeting, Jeju Island, Korea, Sep. 2025

Poster

  • Shusuke Utsumi and Shu-ichiro Inutsuka; "On the Origin of Jupiter-mass Binary Objects (JuMBOs): An Application of Our New Smoothed Particle Radiation Hydrodynamics", Decoding Galactic Evolution Through the Interplay of Multi Phase ISM, Nagoya University, Aug. 2025

Domestic Conference

Oral

  • 内海 秀介,犬塚 修一郎; “弾性体力学シミュレーション手法の新しい定式化” ,『第 54 回 天文・天体物理若 手夏の学校』,賢島 宝生苑,2024 年 7 月
  • 内海 秀介,犬塚 修一郎,小林 浩; “弾性体力学シミュレーション手法の新しい定式化” ,『日本惑星科学会 2024 年秋季講演会』,九州大学,2024 年 9 月
  • 内海 秀介,犬塚 修一郎,小林 浩; “弾性体力学シミュレーション手法の新しい定式化” ,『日本天文学会 2025 年春季年会』,茨城市民会館,2025 年 3 月
  • 内海 秀介,犬塚 修一郎; “弾性体 SPH 法の新しい定式化:中心力相互作用を用いた応力テンソルの再現” ,『日本惑星科学会 2025 年秋季講演会』,東京大学 駒場キャンパス,2025 年 9 月
  • 内海 秀介,犬塚 修一郎; “褐色矮星連星の形成シナリオについて” ,『日本天文学会 2025 年秋季年会』,東京大学 駒場キャンパス,2025 年 9 月

Poster

  • 内海 秀介,犬塚 修一郎,小林 浩; “弾性体力学シミュレーション手法の新しい定式化” ,『第 37 回 理論懇 シンポジウム』,国立天文台,2024 年 12 月
  • 内海 秀介,犬塚 修一郎; “新しい輻射流体計算手法の開発と木星質量連星形成過程の理論的研究” ,『第 55 回 天文・天体物理若 手夏の学校』,戸倉上山田温泉 ホテル圓山荘,2025 年 7 月

Upcoming Conference

Oral

  • Shusuke Utsumi and Shu-ichiro Inutsuka; "Towards Understanding the Collisional Shaping of Asteroids: An Angular-Momentum-Conserving Extension of Smoothed Particle Hydrodynamics to Elastic Dynamics", Rocky Worlds 4, Groningen, Netherlands, Jan. 2026

Projects

An Implementation for Central-force SPH

A numerical elasticity simulation suite powered by central-force SPH. Built with a friendly modern C++ API.

Lang
C++/Python
Repo
GitHub

Shusuke's C++ Library

A collection of self-developed C++ utilities. Delivers the tools needed for numerical computation and simulation through a modern C++20-compliant API. These utilities also support the projects above.

Lang
C++
Repo
GitHub

Contact

Feel free to reach out to me via email or connect with me on GitHub.