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Paper   IPM / Physic / 12767
School of Physics
  Title:   Asymptotically FRW Black Holes
1.  J. Taghizadeh Firouzjaee
2.  R. Mansouri
  Status:   Published
  Journal: Gen. Relat. Gravit.
  Vol.:  42
  Year:  2010
  Pages:   2431
  Supported by:  IPM
Application of concepts like black hole and event horizon in cosmological context are not trivial, as has been shown in the last decade. We introduce special solutions of the LTB family representing collapsing over-dense regions extending to an expanding closed, open, or flat FRW model asymptotically. We study the dynamics of the collapsing region, and its density profile. The question of the strength of the central singularity and its nakedness, as well as the existence of an apparent horizon and an event horizon is dealt with in detail. Differences to the Schwarzschild black hole are addressed.

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