Testing gravity of a regular and slowly rotating phantom black hole by quasi-periodic oscillations

Abstract

We extend firstly the regular phantom black hole solution to a slowly rotating black hole case and find that the phantom field depresses the angular velocity of the event horizon and suppresses the super-radiation of black hole. We also probe the dependence of quasi-periodic oscillations frequencies in relativistic precession model on the phantom parameter. With the observation data of GRO J1655-40, we make a constraint on the parameters of the regular and slowly rotating phantom black hole. Our results show that although the best-fit value of the phantom parameter b is small, the allowed value of b in the 1σ region is b < 0.619, which means that the phantom theoretical model can not be excluded by the constraint from quasi-periodic oscillations with the observation data of GRO J1655-40.

Testing Kerr black hole mimickers with quasi-periodic oscillations from GRO J1655-40

“…With these models, the observation data of QPO frequencies 0123456789(). : V,-vol have been used to constrain the parameters of X-ray binary systems and test the nature of various gravity theories [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Constraint on parameters of a rotating black hole in Einstein-bumblebee theory by quasi-periodic oscillations

“…Assuming a small perturbation around a circular equatorial orbit [38][39][40][41][42][43][44][45][46][47][48][49][50][51], i.e.,…”

“…Thus, the low-frequency quasi-periodic signal is assumed to be emitted at the same orbit of the test particle where the twin higher frequencies signals are generated. Together with the observation data of GRO J1655-40 [32], the constraint on the black hole parameters in various theories of gravity have been performed by quasi-periodic oscillations within the relativistic precession model [38][39][40][41][42][43][44][45][46][47][48][49][50][51]. The main purpose of this paper is to constrain the Lorentz symmetry breaking parameter for a rotating black hole in Einstein-bumblebee theory of gravity by using of quasi-periodic oscillations with the observation data of GRO J1655-40 [32].…”

Ellis wormholes in anti-de Sitter space

“…They are supported by a phantom field, which corresponds to a scalar field with an opposite sign of the kinetic term, thus violating the null energy condition. Such a phantom field can be used to describe the accelerated expansion of the universe [8][9][10][11] and can also be employed to construct black holes [12,13], four-dimensional black rings [14], or star-like objects [15]. a e-mail: jlblaz01@ucm.es b e-mail: xychew998@gmail.com (corresponding author) c e-mail: jutta.kunz@uni-oldenburg.de d e-mail: innocent.yeom@gmail.com Static Ellis wormholes have a very simple geometric structure.…”