Can I read The Hydrodynamic Evolution of Binary Black Holes Embedded Within the Vertically Stratified Disks of Active Galactic Nuclei on EtoBox?

The Hydrodynamic Evolution of Binary Black Holes Embedded Within the Vertically Stratified Disks of Active Galactic Nuclei by Kaaz, Nicholas; Schrøder, Sophie Lund; Andrews, Jeff J.; Antoni, Andrea; Ramirez-Ruiz, Enrico is a scholarly article available to read on EtoBox.

What is The Hydrodynamic Evolution of Binary Black Holes Embedded Within the Vertically Stratified Disks of Active Galactic Nuclei about?

Stellar-mass black holes can become embedded within the gaseous disks of active galactic nuclei (AGNs). Afterwards, their interactions are mediated by their gaseous surroundings. In this work, we study the evolution of stellar-mass binary black holes (BBHs) embedded within AGN disks using a combination of three-dimensional hydrodynamic simulations and analytic methods, focusing on environments in which the AGN disk scale height $H$ is $\gtrsim$ the BBH sphere of influence. We model the local surroundings of the embedded BBHs using a wind tunnel formalism and characterize different accretion regimes based on the local properties of the disk, which range from wind-dominated to quasi-spherical. We use our simulations to develop prescriptions for mass accretion and drag for embedded BBHs. We use these prescriptions, along with AGN disk models that can represent the Toomre-unstable outer regions of AGN disks, to study the long-term evolution of the BBHs as they migrate through the disk. We find that BBHs typically merge within $\lesssim 5-30\,{\rm Myr}$, increasing their mass significantly in the process, allowing BBHs to enter (or cross) the pair-instability supernova mass gap. The rat

Author

Kaaz, Nicholas; Schrøder, Sophie Lund; Andrews, Jeff J.; Antoni, Andrea; Ramirez-Ruiz, Enrico

Published

2021

Language

EN