Pure double-layer bubbles in quadratic 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>F</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>R</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math>
 gravity

Eiroa, Ernesto F.; Figueroa-Aguirre, Griselda; Senovilla, José M. M.

doi:10.1103/physrevd.95.124021

Cited by 42 publications

(53 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Strong deflection case on the other hand, is used for another problems: for example, for investigations of so-called relativistic images. To this end, we wish to point out the strong gravitational lensing for the Schwarzschild black hole [5,6], then extended to the Reissner-Nordström black hole [7,8], regular black holes [9], and wormholes [10][11][12][13], while the investigations of so-called relativistic images see also Refs. [14][15][16][17][18][19].…”

mentioning

confidence: 99%

Distinguishing rotating naked singularities from Kerr-like wormholes by their deflection angles of massive particles

et al. 2019

View full text Add to dashboard Cite

We study the gravitational deflection of relativistic massive particles by Janis-Newman-Winicour (JNW) spacetimes (also known as a rotating source with a surface-like naked singularity), and a rotating Kerr-like wormholes. Based on the recent article [K. Jusufi, Phys.Rev. D 98, 064017 (2018)], we extend some of these results by exploring the effects of naked singularity and Kerr-like objects on the deflection of particles. We start by introducing coordinate transformation leading to an isotropic line element which gives the refraction index of light for the corresponding optical medias. On the other hand, the refraction index for massive particles is found by considering those particles as a de Broglie wave packets. To this end, we apply the Gauss-Bonnet theorem to the isotropic optical metrics to find the deflection angles. Our analysis shows that, in the case of the JNW spacetime the deflection angle is affected by the parameter 0 < γ < 1, similarly, we find that the deformation parameter λ affects the deflection angle in the case of Kerr-like wormholes. In addition to that, we presented a detailed analysis of the deflection angle by means of the Hamilton-Jacobi equation that lead to the same results. As a special case of our results the deflection angle of light is recovered. Finally, we point out that the deflection of particles by Kerr-like wormholes is stronger compared to JNW spacetime, in particular this difference can be used to shed some light from observational point of view in order to distinguish the two spacetimes.

show abstract

mentioning

confidence: 99%

Distinguishing rotating naked singularities from Kerr-like wormholes by their deflection angles of massive particles

et al. 2019

View full text Add to dashboard Cite

show abstract

“…These results were recently extended to any quadratic theory Lagrangian [33]. Within F(R) gravity, several studies have been performed in recent years such as static and spherically symmetric black holes [26,27,[34][35][36][37][38][39], traversable wormholes [40][41][42][43][44][45] and pure double layer bubbles [46].…”

Section: Introductionmentioning

confidence: 99%

Spherical thin shells in F(R) gravity: construction and stability

Eiroa

Figueroa-Aguirre

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

We present a broad class of spherical thin shells of matter in F(R) gravity. We show that the corresponding junction conditions determine the equation of state between the energy density and the pressure/tension at the surface. We analyze the stability of the static configurations under perturbations preserving the symmetry. We apply the formalism to the construction of charged bubbles and we find that there exist stable static configurations for a suitable set of the parameters of the model.

show abstract

“…There exists a sphere around the black hole called "photon sphere", where the deflection angle for the photon can even diverge. Gravitational lensing in the space time of Schwarzschild black holes was first studied by Virbhadra and Ellis [36] and later it was extended to Reissner-Nordstorm [37] and Kerr black holes [38], black holes in brane-world models [39] and Galileon models [40], in extra dimension with Kalb-Ramond field [41] and so on. As strong gravitational lensing in the vicinity of black holes probes different properties of the black holes, it is also useful to probe different modified gravity theories as standard Schwarzschild or Kerr black solutions get modified in different versions of modified gravity theories.…”

Section: Introductionmentioning

confidence: 99%

Astrophysical signatures of black holes in generalized Proca theories

Rahman

Sen

2019

Phys. Rev. D

View full text Add to dashboard Cite

Explaining the late time acceleration is one of the most challenging tasks for theoretical physicists today. Infra-red modification of Einstein's general theory of relativity (GR) is a possible route to model late time acceleration. In this regard, vector-tensor theory as a part of gravitational interactions on large cosmological scales, has been proposed recently. This involves generalization of massive Proca lagrangian in curved space time. Black hole solutions in such theories have also been constructed. In this paper, we study different astrophysical signatures of such black holes. We first study the strong lensing and time delay effect of such static spherically symmetric black hole solutions, in particular for the case of gravitational lensing of the star S2 by Sagittarius A* at the centre of Milky Way. We also construct the rotating black hole solution from this static spherically symmetric solution in Proca theories using the Newman-Janis algorithm and subsequently study lensing, time delay and black hole shadow effect in this rotating black hole space time. We discuss the possibility of detecting Proca hair in future observations.

show abstract

Pure double-layer bubbles in quadratic F(R) gravity

Cited by 42 publications

References 31 publications

Distinguishing rotating naked singularities from Kerr-like wormholes by their deflection angles of massive particles

Distinguishing rotating naked singularities from Kerr-like wormholes by their deflection angles of massive particles

Spherical thin shells in F(R) gravity: construction and stability

Astrophysical signatures of black holes in generalized Proca theories

Contact Info

Product

Resources

About