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Are observations of Hawking radiation at the acoustic event horizon in Bose-Einstein condensates consistent with gravastars?

To reconcile the second law of thermodynamics with the existence of a black hole event horizon, black holes are necessarily said to contain high entropy while gravastars not at all. An event horizon forming out of a collapsing star's intense gravity sufficient enough to force the matter to phase change transforming into Bose-Einstein condensate would be such that nearby matter would be re-emitted as another form of energy, and all matter coming into contact with the event horizon itself would become incorporated.

So, it seems reasonable to wonder if black holes are distinguishable from gravastars since gravastars appear to be better emitters, and black holes better entropy sinks. What do observations of Hawking radiation from acoustic black holes from Bose-Einstein condensate seem to suggest?

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