Work

GRMHD Simulations of Accretion Structures with Different Angular Momentum Profiles

Year: 2024

Type: article

Abstract: In this article, we explore the dynamics of accretion structures encircling spherically symmetric black holes, comparing three accretion disk models with distinct angular momentum profiles: (i) the geometrically thin Keplerian disk, (ii) the Fishbone–Moncrief torus; and (iii) the Polish Doughnut. Employing general relativistic magnetohydrodynamics simulations with the High Accuracy Relativistic Magnetohydrodynamics code, we investigate these three models, considering the magnetic field’s influence on the accretion disk angular momentum redistribution. We show that the magnetic field is a key factor in accretion disk structures, especially in regions with lower mass density. Our investigation verifies the well-established fact that the presence of a magnetic field significantly influences the accretion rate and its temporal variability.

Source: The Astrophysical Journal

DOI: 10.3847/1538-4357/ad5bdd

Authors: Dilshodbek Bardiev, Yuhuan Wang, Martin Kološ, Bobomurat Ahmedov

Institutions: Silesian University in Opava, New Uzbekistan University, University College London, Academy of Sciences Republic of Uzbekistan, Tashkent Institute of Irrigation and Agricultural Mechanization Engineers

Language: English

Topic: Astrophysical Phenomena and Observations

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $4,499

Funders: Grantová Agentura České Republiky, Slezská Univerzita v Opavě