Gravastar

Not to be confused with Gravatar or Gravitar.

A gravastar is an object hypothesized in astrophysics by Pawel O. Mazur and Emil Mottola as an alternative to the black hole theory. It has usual black hole metric outside of the horizon, but de Sitter metric inside. On the horizon there is a thin shell of matter. The term "gravastar" is a portmanteau of the words "gravitational vacuum star".[1] Further theoretical considerations of gravastars include the notion of a nestar (a second gravastar nested within the first one).[2][3]

  1. ^ . This solution of Einstein equations is stable and has no singularities. "Los Alamos researcher says 'black holes' aren't holes at all". Los Alamos National Laboratory. Archived from the original on 13 December 2006. Retrieved 10 April 2014.
  2. ^ McRae, Mike (20 February 2024). "Bubble-Like 'Stars Within Stars' Could Explain Black Hole Weirdness". ScienceAlert. Archived from the original on 20 February 2024. Retrieved 20 February 2024.
  3. ^ Jampolski, Daniel; Rezzolla, Luciano (2024-02-15). "Nested solutions of gravitational condensate stars". Classical and Quantum Gravity. 41 (6): 065014. arXiv:2310.13946. Bibcode:2024CQGra..41f5014J. doi:10.1088/1361-6382/ad2317. S2CID 264426808.