Tidal effects of dark matter halo around a galactic black hole

Abstract

We have investigated the tidal forces and geodesic deviation motion in the spacetime of a black hole in the galaxy with dark matter halo. Our results show that the tidal force and geodesic deviation motion depend on the dark matter halo mass and the typical lengthscale of galaxy. The effect of the typical lengthscale of galaxy on tidal force is opposite to that of dark matter mass. For the radial tidal force, with the increasing mass of dark matter, it increases in the region far from the black hole, but decreases in the region near black hole. For the angular tidal force, its absolute value of angular tidal force monotonously increases with the dark matter halo mass. Especially, the angular tidal force also depends on the particle's energy and the effects of dark matter become more distinct for the test particle with high energy, which is different from those in the usual static black hole spacetimes. We also present the change of geodesic deviation vector with the dark matter halo mass and the typical lengthscale of galaxy under two kinds of initial conditions.

14 pages, 6 figures, Accepted by Chin. Phys. C

References in corpus (13)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First M87 Event Horizon Telescope Results. II. Array and Instrumentation
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• Shadow of a black hole surrounded by dark matter
• Black holes in galaxies: environmental impact on gravitational-wave generation and propagation
• Hawking radiation in a $d$-dimensional static spherically-symmetric black Hole surrounded by quintessence
• Shadows of Sgr A${}^{\ast }$ Black Hole Surrounded by Superfluid Dark Matter Halo
• Black holes in galactic centers: quasinormal ringing, grey-body factors and Unruh temperature
• Gravitational axial perturbations of Schwarzschild-like black holes in dark matter halos
• Ringing of a black hole in a dark matter halo
• Tidal effects in Schwarzschild black hole in holographic massive gravity
• Tidal effects in 4D Einstein-Gauss-Bonnet Black Hole Spacetime
• Tidal Forces in Naked Singularity Backgrounds

Cited by in corpus (13)

• Shadows of black holes with dark matter halo
• Analytical models of supermassive black holes in galaxies surrounded by dark matter halos
• Extreme mass ratio inspirals in galaxies with dark matter halos
• Motion of spinning particles around black hole in a dark matter halo
• Tidal forces in parametrized spacetime: Rezzolla-Zhidenko parametrization
• Black hole in a generalized Chaplygin-Jacobi dark fluid: shadow and light deflection angle
• Charged black hole surrounded by a galactic halo in de Sitter universe
• Effect of generic dark matter halo on transonic accretion onto galactic black holes
• Distinguishing dark matter halos with Extreme mass ratio inspirals
• Tidal effects based on GUP-induced effective metric
• Relativistic structure of a supermassive black hole embedded in the dark matter halo of NGC 4649 (M60)
• Supermassive black hole in NGC 4649 (M60) with a dark matter halo: Impact on shadow measurements and thermodynamic properties
• Tidal properties of D-dimensional Tangherlini black holes