Exploring the cosmic censorship conjecture with a Gauss-Bonnet sector

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dc.authoridMoniz, Paulo/0000-0001-7170-8952
dc.authoridKhaleghi Ardabili, Ahad/0000-0002-0957-1833
dc.authoridTavakoli, Yaser/0000-0003-0099-5100
dc.contributor.authorTavakoli, Yaser
dc.contributor.authorArdabili, Ahad K.
dc.contributor.authorMoniz, Paulo Vargas
dc.date.accessioned2025-02-06T17:58:22Z
dc.date.available2025-02-06T17:58:22Z
dc.date.issued2021
dc.departmentAltınbaş Üniversitesien_US
dc.description.abstractThe Dvali-Gabadadze-Porrati (DGP) braneworld model is employed to study the gravitational collapse of dust, with a Gauss-Bonnet (GB) term present in the five-dimensional bulk. We find that, within the normal (nonself-accelerating) DGP branch and due to the curvature effects from the GB component on the brane, the black hole singularity acquires modified features. More precisely, during collapse and for a finite comoving time, before a singularity would emerge at the zero physical radius, the first time derivative of the Hubble rate diverges, whereas the brane energy density and the Hubble rate remain finite. This is a peculiar behavior which displays similar properties to the sudden singularity occurring in particular late-time cosmological frameworks. Furthermore, the question of whether this altered singularity can be viewed by an external observer or will be hidden by a black hole horizon is addressed. We establish that, depending on the given induced-gravity parameter and the GB coupling constant, there exists a threshold mass for the collapsing dust, below which no trapped surfaces evolve as the collapse proceeds toward the singularity. In other words, a naked sudden singularity may form.en_US
dc.description.sponsorshipFCT at CMA-UBI [UIDBMAT/00212/2020, UIDPMAT/00212/2020]; COST (European Cooperation in Science and Technology) [CA18108]en_US
dc.description.sponsorshipP. V. M. and Y. T. acknowledge the FCT Grants No. UIDBMAT/00212/2020 and No. UIDPMAT/00212/2020 at CMA-UBI. This article is based upon work conducted within the Action CA18108-Quantum gravity phenomenology in the multi-messenger approach-supported by the COST (European Cooperation in Science and Technology).en_US
dc.identifier.doi10.1103/PhysRevD.103.084039
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.issue8en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.103.084039
dc.identifier.urihttps://hdl.handle.net/20.500.12939/5205
dc.identifier.volume103en_US
dc.identifier.wosWOS:000649081200005
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Science
dc.language.isoenen_US
dc.publisherAmer Physical Socen_US
dc.relation.ispartofPhysical Review Den_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.snmzKA_WOS_20250206
dc.subjectGravitational Collapseen_US
dc.subjectNaked Singularitiesen_US
dc.subjectGeneral-Relativityen_US
dc.subjectBraneen_US
dc.subjectDusten_US
dc.titleExploring the cosmic censorship conjecture with a Gauss-Bonnet sectoren_US
dc.typeArticleen_US

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