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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Paczyński–Wiita potential ： ウィキペディア英語版 Paczyński–Wiita potential The Paczyński–Wiita potential is an approximation of the gravitational potential around a non-rotating black hole. It was introduced by Bohdan Paczyński and Paul Wiita in 1980. The article is one of the 40 most-cited from the first 40 years of the journal Astronomy & Astrophysics. The mathematical form of the potential is : $\backslash Phi\_\; (r)=-\backslash frac$ where $r$ is the radial distance from the black hole, $G$ is the gravitational constant, $M$ is the mass of the black hole, and $r\_g=2GM/c^2$ is its Schwarzschild radius. ($c$ is the speed of light.) The potential exactly reproduces the locations of the innermost stable circular orbit and the marginally bound orbit. It also exactly reproduces the form of the angular momentum and accurately approximates the Keplerian angular velocity and epicyclic frequency. Because the Paczyński–Wiita potential reproduces these general relativistic effects and is easy to calculate, it is widely used in numerical simulations of black hole accretion. == References == * * 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Paczyński–Wiita potential」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.