About: Circular geodesics of naked singularities in the Kehagias-Sfetsos metric of Hořava’s gravity

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About: Circular geodesics of naked singularities in the Kehagias-Sfetsos metric of Hořava’s gravity Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.024035
Description	We discuss photon and test-particle orbits in the Kehagias-Sfetsos (KS) metric of Hořava’s gravity. For any value of the Hořava parameter \omega, 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. We discuss photon and test-particle orbits in the Kehagias-Sfetsos (KS) metric of Hořava’s gravity. For any value of the Hořava parameter \omega, 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. (en)
Title	Circular geodesics of naked singularities in the Kehagias-Sfetsos metric of Hořava’s gravity Circular geodesics of naked singularities in the Kehagias-Sfetsos metric of Hořava’s gravity (en)
skos:prefLabel	Circular geodesics of naked singularities in the Kehagias-Sfetsos metric of Hořava’s gravity Circular geodesics of naked singularities in the Kehagias-Sfetsos metric of Hořava’s gravity (en)
skos:notation	RIV/47813059:19240/14:#0005069!RIV15-MSM-19240___
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(EE2.3.20.0071), P(GB14-37086G)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Stuchlík, Zdeněk Schee, Jan Abramowicz, Marek Kluźniak, Włodek Vieira, Ronaldo Savioli Sumé
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Slezská univerzita v Opavě / Filozoficko-přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	7318
http://linked.open...ai/riv/idVysledku	RIV/47813059:19240/14:#0005069
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Hořava's gravity (en)
http://linked.open.../riv/klicoveSlovo	Hořava's gravity
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[FA0CF52CB36C]
http://linked.open...i/riv/nazevZdroje	Physical Review D
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Centrum Alberta Einsteina pro gravitaci a astrofyziku Supporting Integration with the International Theoretical and Observational Research Network in Relativistic Astrophysics of Compact Objects
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	90
http://linked.open...iv/tvurceVysledku	Stuchlík, Zdeněk Schee, Jan Abramowicz, Marek Artur Kluźniak, Włodek Vieira, Ronaldo Savioli Sumé
http://linked.open...ain/vavai/riv/wos	000339447600005
issn	1550-7998
number of pages	14 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevD.90.024035
http://localhost/t...ganizacniJednotka	19240

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