Zobrazeno 1 - 10
of 4 083
pro vyhledávání: '"Qing, Quan"'
In this paper, we study the shadow and images of the accretion disk of Kerr-Newman (KN) black hole (BH) in modified gravity (MOG) theory by using backward ray-tracing method. And, the influence of spin parameter ($a$), charge ($Q$), and MOG parameter
Externí odkaz:
http://arxiv.org/abs/2411.10315
Publikováno v:
The Astrophysical Journal, 975:237, 2024
The image of a Kerr-Newman (KN) black hole (BH) surrounded by a thin accretion disk is derived. By employing elliptic integrals and ray-tracing methods, we analyze photon trajectories around the KN BH. At low observation inclination angles, the secon
Externí odkaz:
http://arxiv.org/abs/2411.07914
We investigate the perturbation of the scalar field as well as the electromagnetic field over a sort of regular black holes which are characterized by the sub-Planckian curvature and the Minkowskian core. Specifically, we compute the quasinormal mode
Externí odkaz:
http://arxiv.org/abs/2411.01764
The shadow and observational images of the non-singular rotating black holes in loop quantum gravity
By considering the celestial light source and the thin disk source, we employ the backward ray-tracing method to carefully study the shadow, inner shadow and observational images of the non-singular rotating black holes in loop quantum gravity. The r
Externí odkaz:
http://arxiv.org/abs/2410.17295
For a system with a Hamiltonian constraint, we demonstrate that its dynamics preserves invariant with respect to the choice of the lapse function, regardless of whether the Hamiltonian incorporates quantum corrections. Applying this observation to th
Externí odkaz:
http://arxiv.org/abs/2408.01780
Our study investigates the astronomical implications of Rastall gravity, particularly its behavior amidst a radiation field compared to Reissner-Nordstrom (RN) black holes. Our research delineates a crucial correlation between the dynamics of the acc
Externí odkaz:
http://arxiv.org/abs/2406.12466
Publikováno v:
JHEP 06 (2024) 213
In this paper, we investigate, in the framework of the topological approach to black hole thermodynamics, using the generalized off-shell Helmholtz free energy, the topological numbers of the static multi-charge AdS black holes in four- and five-dime
Externí odkaz:
http://arxiv.org/abs/2402.00106
Publikováno v:
Physical Review D (2023)
The optical characteristics of the Kazakov-Solodukhin (KS) black hole (BH) surrounded by a thin disk is investigated. By utilizing the ray-tracing technique, we derive the the direct and secondary images to illustrate the influence of observational i
Externí odkaz:
http://arxiv.org/abs/2311.00302
Publikováno v:
Published European Physical Journal C (2023)
The optical characteristics of three types of black holes (BHs) surrounded by a thin accretion disk are discussed, namely the Schwarzschild BH, Bardeen BH, and Hayward BH. We calculate the deflection angle of light as it traverses the vicinity of eac
Externí odkaz:
http://arxiv.org/abs/2310.20523
The determination of the spatial geometry of the universe plays an important role in modern cosmology. Any deviation from the cosmic curvature $\Omega_K=0$ would have a profound impact on the primordial inflation paradigm and fundamental physics. In
Externí odkaz:
http://arxiv.org/abs/2310.14723