BH7 - Black Holes in Higher Dimensions (Black Rings and Black Strings) |
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Speaker |
Noda, Sousuke |
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Coauthors |
Nambu, Yasusada; Takahashi, Masaaki |
| Talk Title |
Analog Rotating Black Holes in a Magnetohydrodynamic Inflow |
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Abstract |
To apply the acoustic black hole to some astrophysical phenomena in which the magnetic fields are important, we generalize it to the magnetohydrodynamics case. As a result, we found that the analog metric for the fast and slow modes of MHD waves is given as a Finsler metric which is non-Riemannian metric, and it reduces to two Riemannian metrics in the limit of magnetic pressure-dominated and gas pressure-dominated cases. Moreover, considering a two-dimensional trans-sonic inflow, we found that the analog geometry for MHD waves can be classified into three types: analog spacetimes of rotating black holes, ultra-spinning stars with ergoregions, and spinning stars without ergoregions. |
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