Geodesics of Sound Waves and Their Wave Fronts in Curved Space-Time : Astrophysics and Relativity
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概要
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In order to clarify the focusing effects of the energy and momentum by wave motion, the wave propagations of a photon and sound wave are investigated in Kerr space-time. By using a canonicaltype formulation for the propagations of electromagnetic disturbances in vacuum and hydrodymical disturbances in accretion disk, the basic properties of sound wave propagation and the numerical calculations of motion of the locus of simultaneous fronts of wave packets are presented. The propagation of sound wave is described by a `sound metric'. In the accreting matter or rotating disk, the `sound horizon' and `sound ergoregion' exists. The effective potential governing sound wave motions show that there is a potential hill near a rotating black hole for the retrograde motion of sound wave. The sound waves inside the potential's hill converge into the rotation axis of the black hole. The light rays emittied into the direction perpendicular to the equatorial plane also converge into the rotation axis. The collimation mechanism of the jet by radiation which is emitted from the accretion disk is discussed.
- 理論物理学刊行会の論文
- 1990-11-25
著者
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Yokosawa M
Ibaraki Univ. Ibaraki
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YOKOSAWA Masayoshi
Department of Physics, Faculty of Natural Science, Ibaraki University
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Takahashi Masaaki
Department Of Orthopaedic Surgery Hamamatsu University School Of Medicine
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ISHIZUKA Toshihisa
Department of Physics, Ibaraki University
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Takahashi Masaaki
Department Of Applied Biological Sciences Graduate School Of Life And Environmental Sciences Osaka P
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Ishizuka Toshihisa
Department Of Physics Hokkaido University
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Yokosawa Masayoshi
Department Of Natural Science Ibaraki University
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Takahashi Masaaki
Department Of Physics Nagoya University
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Takahashi Masaaki
Department Of Applied Biological Chemistry Faculty Of Agriculture Osaka Prefecture University
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TAKAHASHI Masaaki
Department of Physics, Nagoya University
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