Structure of the thin accretion disk around a distorted deformed mass versus a distorted static black hole
Abstract
Accretion disks are astronomical objects made of rotating gas which slowly spirals onto a central gravitating body. The gravitational energy of infalling matter extracted in accretion disks powers stellar binaries, active galactic nuclei, protoplanetary discs, and some gamma-ray bursts. In accretion disks, the high angular momentum of the rotating matter is gradually transported outwards by stresses related to turbulence viscosity, shear, and magnetic fields. This gradual loss of angular momentum allows matter to progressively move inwards. Accretion disks process is governed by a non-linear combination of gravity, hydrodynamics, viscosity, radiation and magnetic fields. Mainly, there are mainly four different kinds of the Accretion disks models that some of them can be treated analytically; however, all of them explore in simulations. In this work we consider the standard relativistic geometrically thin and optically thick accretion disk around a distorted static black hole and other compact objects. The distortion is the result of the existence of a static axisymmetric external distribution of matter. Our main purpose of this work is to investigate whether the other compact objects' models have their own observational fingerprint if they do exist. Indeed, understanding the astrophysical behavior of them seems to be extremely important in the general relativity perspective. We study the effects due to a distortion up to the quadrupole and compare the physical characteristics of thin accretion disk for both cases. We found out that there are significant differences in the properties of thin accretion discs around special compact objects and black holes, which may help us to distinguish them from each other in the observation point of view. Also, the presence of the distribution can describe the exterior of a non-isolated object that in fact may be more realistic in the sense that it has many examples in nature, also it could consider as a solution that models the effect of the outer part of the disk on its inner part.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1617F