Mazur and Mottola hypothesize that just outside this region there will be a very dense form of matter, Bose-Einstein condensate. This can be created in a lab by super cooling atoms to expand their wavelengths, enabling the atoms to superimpose their wave-functions to create one very dense form of atom. To outside observers, the outer core of a Gravastar would appear to be Bose-Einstein condensate. The severe red-shifting of space-time as photons climb out of the gravity well would make the core seem very cold, almost absolute zero.
Externally, a gravastar appears similar to a black hole: it is visible only by the high-energy radiation it emits while consuming matter, and by the Hawking radiation it creates. Astronomers observe the sky for X-rays emitted by infalling matter to detect black holes. A gravastar would produce an identical signature.
Mazur and Mottola suggest that the violent creation of a gravastar might be an explanation for the origin of our universe and many other universes, as all of the matter from a collapsing star would implode "through" the central hole and explode into a new dimension and expand forever, which would be consistent with the current theories regarding the big bang. This "new dimension" exerts an outward pressure on the Bose-Einstein condensate layer and prevents it from collapsing further.
Gravastars also could provide a mechanism for describing how dark energy accelerates the expansion of the universe. One possible theory uses Hawking radiation as a means to exchange energy between the "parent" universe and the "child" universe, and so cause the rate of expansion to accelerate, but this area is under much speculation.
Gravastar formation may provide an alternate explanation for sudden and intense gamma ray bursts throughout space.
Tyson E. Lewis and Richard Kahn. Education Out of Bounds: Reimagining Cultural Studies for a Posthuman Age.(Book review)
Jan 01, 2011; Tyson E. Lewis and Richard Kahn. Education Out of Bounds: Reimagining Cultural Studies for a Posthuman Age. New York: Palgrave...