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Title: Asymptotically flat black holes with scalar hair: a review
Author: Herdeiro, Carlos A. R.
Radu, Eugen
Keywords: Black holes
Scalar fields
No-hair theorems
Issue Date: Aug-2015
Publisher: World Scientific Publishing
Abstract: We consider the status of black hole (BH) solutions with nontrivial scalar fields but no gauge fields, in four-dimensional asymptotically flat spacetimes, reviewing both classical results and recent developments. We start by providing a simple illustration on the physical difference between BHs in electro-vacuum and scalar-vacuum. Next, we review no-scalar-hair theorems. In particular, we detail an influential theorem by Bekenstein and stress three key assumptions: (1) The type of scalar field equation; (2) the spacetime symmetry inheritance by the scalar field and (3) an energy condition. Then, we list regular (on and outside the horizon), asymptotically flat BH solutions with scalar hair, organizing them by the assumption which is violated in each case and distinguishing primary from secondary hair. We provide a table summary of the state-of-the-art.
Peer review: yes
DOI: 10.1142/S0218271815420146
ISSN: 0218-2718
Appears in Collections:CIDMA - Artigos
DFis - Artigos
GGDG - Artigos

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