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Alireza Khesali

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address: Department of Physics, Faculty of Basic Sciences,University of Mazandaran
Phone: 35343085

Research

Title
The role of the global magnetic field and thermal conduction on the structure of the accretion discs of all models
Type
JournalPaper
Keywords
accretion, accretion discs – stars: magnetic field – ISM: jets and outflows – ISM: magnetic fields – conduction – ISM:structure.
Year
2018
Journal MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
DOI
Researchers Mohamad Farahinezhad ، Alireza Khesali

Abstract

In this paper, the effects of global magnetic field and thermal conduction on the vertical structure of the accretion discs have been investigated. In this study, four types of discs were examined: gas-pressure-dominated standard disc, radiation-pressure-dominated standard disc, advection dominates accretion flow (ADAF) disc, and slim disc. Moreover, the general shape of themagnetic field, including toroidal and poloidal components, is considered. Themagnetohydrodynamic equations were solved in spherical coordinates using self-similar assumptions in the radial direction. Following previous authors, the polar velocity vθ is non-zero and Trϕ was considered as a dominant component of the stress tensor. The results show that the disc becomes thicker compared to the non-magnetic fields. It has also been shown that the presence of the thermal conduction in the ADAF model makes the disc thicker; the disc is expanded in the standard model.