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Statements

Subject Item
n2:RIV%2F47813059%3A19240%2F14%3A%230005069%21RIV15-MSM-19240___
rdf:type
n17:Vysledek skos:Concept
rdfs:seeAlso
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.024035
dcterms: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.
dcterms: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
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
skos:notation
RIV/47813059:19240/14:#0005069!RIV15-MSM-19240___
n3:aktivita
n12:P n12:I
n3:aktivity
I, P(EE2.3.20.0071), P(GB14-37086G)
n3:cisloPeriodika
2
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
Kluźniak, Włodek Vieira, Ronaldo Savioli Sumé n18:5480248 n18:5038901 n18:4888081
n3:druhVysledku
n16:J
n3:duvernostUdaju
n4:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
7318
n3:idVysledku
RIV/47813059:19240/14:#0005069
n3:jazykVysledku
n15:eng
n3:klicovaSlova
Hořava's gravity
n3:klicoveSlovo
n6:Ho%C5%99ava%27s%20gravity
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[FA0CF52CB36C]
n3:nazevZdroje
Physical Review D
n3:obor
n13:BN
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:projekt
n19:EE2.3.20.0071 n19:GB14-37086G
n3:rokUplatneniVysledku
n9:2014
n3:svazekPeriodika
90
n3:tvurceVysledku
Abramowicz, Marek Artur Vieira, Ronaldo Savioli Sumé Stuchlík, Zdeněk Schee, Jan Kluźniak, Włodek
n3:wos
000339447600005
s:issn
1550-7998
s:numberOfPages
14
n11:doi
10.1103/PhysRevD.90.024035
n5:organizacniJednotka
19240