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We explore the effects of anisotropic thermal conduction, anisotropic pressure, and magnetic field strength on the hot accretion flows around black holes by solving the axisymmetric, steady-state magnetohydrodynamic equations. The…

High Energy Astrophysical Phenomena · Physics 2022-03-09 Amin Mosallanezhad , Fatemeh Zahra Zeraatgari , Liquan Mei , De-Fu Bu

Observations indicate that wind can be generated in hot accretion flow. By performing numerical simulations, Yuan et al. studied the detailed properties of wind generated from weakly magnetized accretion flow. However, properties of wind…

High Energy Astrophysical Phenomena · Physics 2018-07-18 De-Fu Bu , Amin Mosallanezhad

We present self-similar solutions for advection -dominated accretion flows with thermal conduction in the presence of outflows. Possible effects of outflows on the accretion flow are parametrized and a saturated form of thermal conduction,…

Astrophysics · Physics 2009-11-13 Mohsen Shadmehri

This is the fourth paper of our series of works studying winds from hot accretion flows around black holes. In the first two papers, we have shown the existence of strong winds in hot accretion flows using hydrodynamical and…

High Energy Astrophysical Phenomena · Physics 2021-06-30 Hai Yang , Feng Yuan , Ye-fei Yuan , Christopher J. White

Thermal conduction has been suggested as a possible mechanism by which sufficient extra heating is provided in radiation-dominated accretion flows. We consider the extreme case in which the generated energy due to the viscosity and the…

Astrophysics · Physics 2007-05-23 Mohsen Shadmehri , Fazeleh Khajenabi

We study slowly rotating accretion flow at parsec and sub-parsec scale irradiated by a low luminosity active galactic nuclei. We take into account the Compton heating, photoionization heating by the central X-rays. The bremsstrahlung…

High Energy Astrophysical Phenomena · Physics 2018-01-24 De-Fu Bu , Xiao-Hong Yang

We examine the effects of a hydrodynamical wind on advection dominated accretion flows with thermal conduction in the presence of a toroidal magnetic field under a self-similar treatment. The disk gas is assumed to be isothermal. For a…

Astrophysics of Galaxies · Physics 2010-12-16 S. Abbassi , J. Ghanbari , M. Ghasemnezhad

The observation of the hot gas surrounding Sgr $A^*$ and a few other nearby galactic nuclei imply that electron and proton mean free paths are comparable to the gas capture radius. So, the hot accretion flows is likely to proceed under…

Astrophysics · Physics 2011-08-31 S. Abbassi , J. Ghanbari , S. Najjar

The purpose of this paper is to explore the dynamical behaviour of hot accretion flow with thermal conduction. The importance of thermal conduction on hot accretion flow is confirmed by observations of the hot gas that surrounds Sgr A$^*$…

High Energy Astrophysical Phenomena · Physics 2012-05-11 Kazem Faghei

We solve the two-dimensional hydrodynamic equations of hot accretion flow in the presence of the thermal conduction. The flow is assumed to be in steady-state and axisymmetric, and self-similar approximation is adopted in the radial…

High Energy Astrophysical Phenomena · Physics 2021-03-24 Amin Mosallanezhad , Fatemeh Zahra Zeraatgari , Liquan Mei , De-Fu Bu

We perform two-dimensional simulations to study how the wind strength changes with accretion rate. We take into account bremsstrahlung, synchrotron radiation and the Comptonization. We find that when the accretion rate is low, radiative…

High Energy Astrophysical Phenomena · Physics 2017-12-20 De-Fu Bu , Zhao-Ming Gan

Previous MHD simulations have shown that wind must exist in black hole hot accretion flows. In this paper, we continue our study by investigating the detailed properties of wind, such as mass flux and poloidal speed, and the mechanism of…

High Energy Astrophysical Phenomena · Physics 2015-05-20 Feng Yuan , Zhaoming Gan , Ramesh Narayan , Aleksander Sadowski , Defu Bu , Xue-Ning Bai

We examine the effects of thermal conduction on relativistic, magnetized, viscous, advective accretion flows around rotating black holes considering bremsstrahlung and synchrotron cooling processes. Assuming the toroidal component of…

High Energy Astrophysical Phenomena · Physics 2025-04-28 Monu Singh , Camelia Jana , Santabrata Das

Wind is believed to be widespread in various black hole accretion flows. However, unlike the wind from thin disks, which have substantial observational evidence, the wind from hot accretion flows is difficult to observe due to the extremely…

High Energy Astrophysical Phenomena · Physics 2024-08-30 Hai Yang , Feng Yuan

We have explored the structure of hot flow bathed in a general large-scale magnetic field. The importance of outflow and thermal conduction on the self-similar structure of a hot accretion flows has been investigated. We consider the…

High Energy Astrophysical Phenomena · Physics 2015-06-05 A. Mosallanezhad , M. Khajavi , S. Abbassi

Steady-state advective accretion flows in the presence of thermal conduction are studied. All three components of velocity in a spherical coordinates are considered and the flow displays both inflowing and outflowing regions according to…

Astrophysics of Galaxies · Physics 2015-06-17 Fazeleh Khajenabi , Mohsen Shadmehri

Motivated by observations of multiphase galaxy outflows, we explore the impact of isotropic and anisotropic electron thermal conduction on the evolution of radiatively-cooled, cold clouds embedded in hot, magnetized winds. Using the…

Astrophysics of Galaxies · Physics 2023-08-02 M. Brüggen , E. Scannapieco , P. Grete

We study global transonic solution for a relativistic, magnetized, viscous advective accretion flow around a rotating black hole, incorporating the effects of mass and angular momentum loss through winds. Our model considers dominant…

High Energy Astrophysical Phenomena · Physics 2026-04-17 Camelia Jana , Santabrata Das

The large temperature difference between cold gas clouds around galaxies and the hot halos that they are moving through suggests that thermal conduction could play an important role in the circumgalactic medium. However, thermal conduction…

Astrophysics of Galaxies · Physics 2021-01-29 Richard Kooij , Asger Grønnow , Filippo Fraternali

This paper investigates the effects of saturated thermal conduction (TC) and thermal-driven winds (TDWs) on magnetized advection-dominated accretion onto a rotating black hole (BH). We incorporate dissipative processes in the magnetized…

High Energy Astrophysical Phenomena · Physics 2025-01-20 Biplob Sarkar , Indu Kalpa Dihingia , Ranjeev Misra
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