MG15 - Talk detail |
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Participant |
Noda, Sousuke | |||||||
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Institution |
Kyoto University - Yoshida honmachi, Sakyo-ku - Kyoto-shi - Kyoto-fu - Japan | |||||||
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Session |
BH7 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
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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