A dark-energy star is a hypothetical compact astrophysical object, which a minority of physicists think might constitute an alternative explanation for observations of astronomical black hole candidates.
[1] In March 2005, physicist George Chapline claimed that quantum mechanics makes it a "near certainty" that black holes do not exist and are instead dark-energy stars.
As a column of superfluid grows taller, at some point, density increases, slowing down the speed of sound, so that it approaches zero.
In the dark-energy star hypothesis, infalling matter approaching the event horizon decays into successively lighter particles.
[3] Furthermore, 'primordial' dark-energy stars could form by fluctuations of spacetime itself, which is analogous to "blobs of liquid condensing spontaneously out of a cooling gas".