TY - JOUR
ID - 271
TI - Semi-Keplerian Magnetized Accretion-Ejection Structures
JO - Iranian Journal of Astronomy and Astrophysics
JA - IJAA
LA - en
SN - 2322-4924
AU - Mousavi, Seyedeh Zeynab
AU - Khesali, Ali Reza
AU - Khosravi, Azar
AD - Department of physics, University of Mazandaran, Babolsar, Iran
Y1 - 2021
PY - 2021
VL - 8
IS - 2
SP - 147
EP - 162
KW - accretion disks
KW - Magnetic fields
KW - keplerian rotation
KW - magnetized accretion-ejection structure
DO - 10.22128/ijaa.2022.577.1121
N2 - The structure of a thin geometrically, axisymmetric, a stationary disk around a central black hole threaded by a bipolar magnetic field has been Studied that drives jets by extracting angular momentum. In this work, it is assumed that the effect of viscosity turbulence is negligible. If the effect of viscosity turbulence is negligible and the lines of the initial magnetic field have the required curvature, the magnetic force can be the only factor that determines the material leaving the disk. A primary poloidal magnetic field is applied to the disk, which has two components r and z. The equations that describe the vertical structure of the disk in a cylindrical system have been solved. We assume that the angular velocity is not completely Keplerian and the deviation from the Keplerian rotation enters the equations. It was seen that for a smaller ejection rate (a smaller ), the deviation from the Keplerian rotation is greater. The vertical structure equations of the disk were written with the presence of the polytropic equation. The gas with polytropic state equation with different gammas is given in this paper. For all gases, the variation in the toroidal magnetic field in the vertical direction is similar and for a constant ejection rate, the monoatomic gas has a greater deviation from the Keplerian rotation. Our results show in the presence of the polytropic equation and the deviation from Keplerian rotation, the process of mass reduction in the vertical direction for diatomic gas occurs faster.
UR - https://ijaa.du.ac.ir/article_271.html
L1 - https://ijaa.du.ac.ir/article_271_cb13e81daf77c9f2be26178ededb463f.pdf
ER -