Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/86432
Type: Artigo de periódico
Title: Circular Geodesics Of Naked Singularities In The Kehagias-sfetsos Metric Of Hořava's Gravity
Author: Vieira R.S.S.
Schee J.
Kluzniak W.
Stuchlik Z.
Abramowicz M.
Abstract: We discuss photon and test-particle orbits in the Kehagias-Sfetsos (KS) metric of Hořava's gravity. For any value of the Hořava parameter ω, there are values of the gravitational mass M for which the metric describes a naked singularity, and this is always accompanied by a vacuum "antigravity sphere" on whose surface a test particle can remain at rest (in a zero angular momentum geodesic), and inside which no circular geodesics exist. The observational appearance of an accreting KS naked singularity in a binary system would be that of a quasistatic spherical fluid shell surrounded by an accretion disk, whose properties depend on the value of M, but are always very different from accretion disks familiar from the Kerr-metric solutions. The properties of the corresponding circular orbits are qualitatively similar to those of the Reissner-Nordström naked singularities. When event horizons are present, the orbits outside the Kehagias-Sfetsos black hole are qualitatively similar to those of the Schwarzschild metric. © 2014 American Physical Society.
Editor: American Physical Society
Rights: aberto
Identifier DOI: 10.1103/PhysRevD.90.024035
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84904343518&partnerID=40&md5=8ca5ff9855cc96fb654afd5a1e424b1e
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-84904343518.pdf2.77 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.