General relativistic radiative hydrodynamic simulation by six dimensional photon Boltzmann equation

2016 Fiscal Year Final Research Report

• Project/Area Number: 25610044
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Tomakomai National College of Technology
• Principal Investigator: Takahashi Rohta 苫小牧工業高等専門学校, その他部局等, 准教授 (40513453)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: ブラックホール / ボルツマン方程式 / 輻射輸送 / 輻射流体 / 一般相対論

Outline of Final Research Achievements

In curved spacetime such as black hole spacetime, there is no numerical method to accurately solve general relativistic (GR) photon Boltzmann equation (radiative transfer equation) for arbitrary optical thickness of photon. In this study, we proposed a new method to solve GR photon Boltzmann equation with photon processes of emission, absorption and scattering, and developed a new GR radiative transfer equation solver, ARTIST (Takahashi, Umemura, 2017, MNRAS, 464, 4567). By ARTIST code, we can perform GR radiative transfer simulations which correctly reproduce results of GR ray-tracing calculations with high accuracy.

Free Research Field

宇宙物理学