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Black hole event horizons are cosmologically coupled
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It is shown that an exactly static and spherically symmetric black hole event horizon cannot be embedded in a time-dependent geometry. Forcing it to do so results in a naked null singularity at the would-be horizon. Therefore, since the universe is expanding, black holes must couple to the cosmological expansion, which was suggested as the growth mechanism for supermassive black holes in galaxies, with implications for the dark energy puzzle.
Forward citations
Cited by 5 Pith papers
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Static horizons in cosmology
The paper presents exact general-relativity metrics with static or asymptotically static horizons embedded in FLRW cosmologies, offered as counterexamples to no-go theorems.
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