Tidal force effects and periodic orbits in null naked singularity spacetime

Abstract

Naked singularities form during the gravitational collapse of inhomogeneous matter clouds. The final nature of the singularity depends on the initial conditions of the matter properties and types of matter profiles. These naked singularities can also be divided into two types: null-like and timelike singularities. The spacelike singularity of the Schwarzschild black hole can be distinguished from the null and timelike naked singularity spacetimes. In light of this, we investigate the precession of timelike bound orbits in the null naked singularity spacetime, as well as tidal force effects and geodesic deviation features. As a result, we find that the orbital precession of the timelike bound orbits in null naked singularity spacetime could be distinguished from the Schwarzschild precession case. The radial component of the tidal force has an intriguing profile, whereas the angular component has a profile which is comparable to that of a Schwarzschild black hole scenario. The geodesic deviation equation is then solved numerically, yielding results that resemble a Schwarzschild black hole. These characteristic features can then be used to discern amongst these singularities.

Tidal effects based on a GUP-induced effective metric

“…These are common in the Universe, from our solar system to stars in binary systems, galaxies, clusters of galaxies and even gravitational waves [54]. On the theoretical side, tidal effects have been studied in various spherically symmetric spacetimes, such as the Reissner-Nordström black hole [55], the Kiselev black hole [56], some regular black holes [57,58], the Schwarzschild black hole in massive gravity [59], the 4D Einstein-Gauss-Bonnet black hole [60], Kottler spacetimes [61], and many others [62][63][64][65][66][67].…”

Rotational energy extraction from the Kerr black hole's mimickers

“…In various literature, researchers have explored the different observational properties of different possible compact objects (Black holes, naked singularities, wormholes) for e.g. the shadow properties, [9][10][11][12][13][14][15][16][17][18][19][20], gravitational lensing [21][22][23][24][25][26][27], accretion disk properties [28][29][30][31][32][33][34][35] and orbital precession [36][37][38][39][40][41][42][43][44]. The similar observable properties were studied in singularity-free compact objects (regular black holes and worm holes) [45][46][47][48][49][50][51][52][53][54][55][56].…”

Rotational Energy Extraction from the Kerr Black Hole’s Mimickers

“…In various literature, researchers have explored the different observational properties of different possible compact objects (black holes, naked singularities, and wormholes) for, e.g., the shadow properties, [9][10][11][12][13][14][15][16][17][18][19][20][21], gravitational lensing [22][23][24][25][26][27][28], accretion disk properties [29][30][31][32][33][34][35][36], and orbital precession [37][38][39][40][41][42][43][44][45]. Similar observable properties were studied in singularity-free compact objects (regular black holes and worm holes) [46][47][48][49][50][51][52][53][54][55][56]…”