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- W2017242563 abstract "We study and numerically compute the scattering coefficients of shallow water waves blocked by a stationary counterflow. When the flow is transcritical, the coefficients closely follow Hawking's prediction according to which black holes should emit a thermal spectrum. We study how the spectrum deviates from thermality when reducing the maximal flow velocity, with a particular attention to subcritical flows since these have been recently used to test Hawking's prediction. For such flows, we show that the emission spectrum is strongly suppressed, and that its Planckian character is completely lost. For low frequencies, we also show that the scattering coefficients are dominated by elastic hydrodynamical channels. Our numerical results reproduce rather well the observations made by S. Weinfurtner et al. in the Vancouver experiment. Nevertheless, we propose a new interpretation of what has been observed, as well as new experimental tests." @default.
- W2017242563 created "2016-06-24" @default.
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- W2017242563 date "2014-08-14" @default.
- W2017242563 modified "2023-09-25" @default.
- W2017242563 title "Probing the thermal character of analogue Hawking radiation for shallow water waves?" @default.
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- W2017242563 doi "https://doi.org/10.1103/physrevd.90.044033" @default.
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