Schwarzschild black hole. In order to discuss quantitatively the central engine of gamma-ray bursts, we need the comprehensive studies of the formation, evolution, temperature dependence, opacity and geometry of the accretion disk and with the mechanism of the energy deposition, its efficiency, th...
The radial profile of temperature in the inner region of a black-hole accretion disk is investigated in detail and it is found (1) that the temperature does not decrease monotonically in the radial direction, rather, a peak exists near the inner edge of the disk, separated from it by a ...
In this paper, we study the shadows and images of the accretion disk of Kerr–Newman (KN) black hole (BH) in modified gravity (MOG) theory by using the backward ray-tracing method. And, the influence of spin parameter (a), charge (Q), and MOG parameter (α) on the observed features...
Stellar black hole formed from the core collapse of a massive star, with a swirling accretion disk. vector illustration 4K Stellar black and white pattern small blue stars on dark background stock illustration More stock footage ofDmytro Zaharchuk's portfolio ...
Gravastars, hypothetic astrophysical objects, consisting of a dark energy condensate surrounded by a strongly correlated thin shell of anisotropic matter, have been proposed as an alternative to the standard black hole picture of general relativity. Observationally distinguishing between astrophysical black...
C (2024) 84:1075 https://doi.org/10.1140/epjc/s10052-024-13454-6 Regular Article - Theoretical Physics Thin accretion disk around black hole in Einstein–Maxwell-scalar theory Yingdong Wua, Haiyuan Fengb , Wei-Qiang Chenc Department of Physics, Southern University of Science and Technology, ...
For specific values of the spin parameter and of the scalar charge, the energy flux from the disk around a rotating naked singularity can exceed by several orders of magnitude the flux from the disk of a Kerr black hole. In addition to this, it is also shown that the conversion efficiency...
3) black hole accretion disk 黑洞吸积盘 1. The evolution ofblack hole accretion disks is investigated by considering both the thin disk accretion and the Blandford Znajek (B Z) process. 在同时考虑薄盘吸积与Blandford Znajek过程的条件下讨论了黑洞吸积盘的的演化,并指出黑洞的无量纲角动量a 是标...
We identify the dark region on the EHT image with the event horizon silhouette and, respectively, the bright region on the EHT image with the brightest point in the accretion disk. For the case of the supermassive black hole M87*, we find the angular distance of the brightest point in the...
The Event Horizon Telescope’s global network of radio dishes has produced the first-ever direct image of a black hole and its event horizon. By Davide Castelvecchi The Event Horizon Telescope network has obtained the first image of a black hole — at the centre of the galaxy M87....