Role of Gauss-Bonnet corrections in a DGP brane gravitational collapse
[ X ]
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
An Oppenheimer-Snyder (OS)-type collapse is considered for a Dvali-Gabadadze-Porrati (DGP) brane, whereas a Gauss-Bonnet (GB) term is provided for the bulk. We study the combined effect of the DGP induced gravity plus the GB curvature, regarding any modification of the general relativistic OS dynamics. Our paper has a twofold objective. On the one hand, we investigate the nature of singularities that may arise at the collapse end state. It is shown that all dynamical scenarios for the contracting brane would end in one of the following cases, depending on conditions imposed: either a central shell-focusing singularity or what we designate as a ???sudden collapse singularity.??? On the other hand, we also study the deviations of the exterior spacetime from the standard Schwarzschild geometry, which emerges in our modified OS scenario. Our purpose is to investigate whether a black hole always forms regarding this brane world model. We find situations where a naked singularity emerges instead.
Açıklama
Anahtar Kelimeler
Astronomy, Astrophysics, Physics
Kaynak
Physical Review D
WoS Q Değeri
Q1
Scopus Q Değeri
Cilt
105
Sayı
8
Künye
Tavakoli, Y., Ardabili, A. K., Bouhmadi-López, M., Moniz, P. V. (2022). Role of Gauss-Bonnet corrections in a DGP brane gravitational collapse. Physical Review D, 105(8).
