翻訳と辞書 Words near each other ・ Near-Earth Object Camera ・ Near-Earth orbit ・ Near-Earth supernova ・ Near-equatorial orbit ・ Near-equilibrium enzymatic flux transfer networks ・ Near-extremal black hole ・ Near-fall ・ Near-far problem ・ Near-field (mathematics) ・ Near-field electromagnetic ranging ・ Near-field magnetic induction communication ・ Near-field optics ・ Near-field scanner ・ Near-field scanning optical microscope ・ Near-front vowel ・ Near-horizon metric ・ Near-infrared signature management technology ・ Near-infrared spectroscopy ・ Near-infrared window in biological tissue ・ Near-Life Experience ・ Near-me area network ・ Near-miss Johnson solid ・ Near-open central vowel ・ Near-open front unrounded vowel ・ Near-open vowel ・ Near-ring ・ Near-semiring ・ Near-sourcing ・ Near-surface geophysics ・ Near-term digital radio Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Near-horizon metric ： ウィキペディア英語版 Near-horizon metric The near-horizon metric (NHM) refers to the near-horizon limit of the global metric of a black hole. NHMs play an important role in studying the geometry and topology of black holes, but are only well defined for extremal black holes.〔Hari K Kunduri, James Lucietti. ''A classification of near-horizon geometries of extremal vacuum black holes''. Journal of Mathematical Physics, 2009, 50(8): 082502. (arXiv:0806.2051v3 (hep-th) )〕〔Hari K Kunduri, James Lucietti. ''Static near-horizon geometries in five dimensions''. Classical and Quantum Gravity, 2009, 26(24): 245010. (arXiv:0907.0410v2 (hep-th) )〕〔Hari K Kunduri. ''Electrovacuum near-horizon geometries in four and five dimensions''. Classical and Quantum Gravity, 2011, 28(11): 114010. (arXiv:1104.5072v1 (hep-th) )〕 NHMs are expressed in Gaussian null coordinates, and one important property is that the dependence on the coordinate $r$ is fixed in the near-horizon limit. ==NHM of extremal Reissner–Nordström black holes== The metric of extremal Reissner–Nordström black hole is :$ds^2\backslash ,=\backslash ,-\backslash Big(1-\backslash frac\backslash Big)^2\backslash ,dt^2+\backslash Big(1-\backslash frac\backslash Big)^dr^2+r^2\backslash ,\backslash big(d\backslash theta^2+\backslash sin^2\backslash theta\backslash ,d\backslash phi^2\; \backslash big)\backslash ,.$ Taking the near-horizon limit :$t\backslash mapsto\; \backslash frac\backslash ,,\backslash quad\; r\backslash mapsto\; M+\backslash epsilon\backslash ,\backslash tilde\backslash ,,\backslash quad\; \backslash epsilon\backslash to\; 0\backslash ,,$ and then omitting the tildes, one obtains the near-horizon metric :$ds^2=-\backslash frac\backslash ,dt^2+\backslash frac\backslash ,dr^2+M^2\backslash ,\backslash big(d\backslash theta^2+\backslash sin^2\backslash theta\backslash ,d\backslash phi^2\; \backslash big)$ 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「Near-horizon metric」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.