Development of a Numerical Simulation Method for Rocky Body Impacts and Theoretical Analysis of Asteroidal Shapes
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Beschreibung
This book describes numerical simulations of collisions between asteroids, based on a unique numerical code developed by the author. The code accurately solves the elastic dynamic equations and describes the effects of fracture and friction, which makes it possible to investigate the shapes of impact outcomes produced by asteroid collisions and subsequent gravitational accumulation of fragments.
The author parallelizes the code with high parallelization efficiency; accordingly, it can be used to conduct high-resolution simulations with the aid of supercomputers and clarify the shapes of small remnants produced through the catastrophic destruction of asteroids. The author demonstrates that flat asteroids can only be produced by impacts involving objects with similar mass and low velocity, which suggests that the flat asteroids in our solar system were created in the planet formation era and have kept their shapes until today. The author also shows that asteroid collisionsunder certain conditions can produce the extremely elongated shape of an interstellar minor body, 1I/‘Oumuamua. In brief, the book offers a comprehensive investigation of asteroid impacts and shapes, making it a uniquely valuable resource.
Nominated as an outstanding Ph.D. thesis by the Nagoya University, Japan Summarizes SPH techniques required for simulations of solid body impacts, helping readers to develop simulation codes using the SPH method Comprehensively investigates asteroid impacts and quantitatively clarifies shapes of asteroids formed by various impacts Proposes a collisional history of large asteroids, i.e., that large and flat asteroids were created in the planet formation era, and have kept their shapes until today
Autor*in
Keisuke Sugiura
Themen in »Development of a Numerical Simulation Method for Rocky Body Impacts and Theoretical Analysis of Asteroidal Shapes«
Numerical Simulations of Asteroid Collisions Asteroid Shapes Formed Through Collisions High-resolution Simulations of Catastrophic Destruction Smoothed Particle Hydrodynamics SPH Method for Elastic Dynamics Suppress Tensile Instability with Godunov SPH Method Collision Physics of Rocky/Granular Bodies Formation Era of Asteroid Shapes Collisional Formation of 1i/ʻoumuamua Planetary System Formation theoretical astrophysics