J
2022
Numerical Simulation of Hot Accretion Flow around Bondi Radius
MOSALLANEZHAD, Amin, De-Fu BU, Miljenko ČEMELJIĆ, Fatemeh Zahra ZERAATGARI, Yang HAI et. al.
Basic information
Original name
Numerical Simulation of Hot Accretion Flow around Bondi Radius
Authors
MOSALLANEZHAD, Amin (191 Croatia), De-Fu BU, Miljenko ČEMELJIĆ (191 Croatia, belonging to the institution), Fatemeh Zahra ZERAATGARI, Yang HAI and Liquan MEI
Edition
Astrophysical Journal, GB - Spojené království Velké Británie a, 2022, 0004-637X
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/47813059:19630/22:A0000225
Organization unit
Institute of physics in Opava
Keywords in English
advection-dominated accreation;angular momentum material;black holes;thermal conduction;disks;gas;instability;density;models;origin
Tags
International impact, Reviewed
V originále
Previous numerical simulations have shown that strong winds can be produced in the hot accretion flows around black holes. Most of those studies focus only on the region close to the central black hole; therefore it is unclear whether the wind production stops at large radii around Bondi radius. Bu et al. (2016) studied the hot accretion flow around the Bondi radius in the presence of nuclear star gravity. They find that, when the nuclear stars gravity is important-comparable to the black hole gravity, winds cannot be produced around the Bondi radius. However, for some galaxies, the nuclear stars gravity around Bondi radius may not be strong. In this case, whether winds can be produced around Bondi radius is not clear. We study the hot accretion flow around Bondi radius with and without thermal conduction by performing hydrodynamical simulations. We use the virtual particles trajectory method to study whether winds exist based on the simulation data. Our numerical results show that, in the absence of nuclear stars gravity, winds can be produced around Bondi radius, which causes the mass inflow rate to decrease inwards. We confirm the results of Yuan et al. (2012), which indicate this is due to the mass loss of gas via wind rather than convectional motions.
Displayed: 20/11/2024 17:37