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We perform a series of high-resolution 2D hydrodynamical simulations of equal-mass binary black holes (BBHs) embedded in active galactic nucleus (AGN) accretion disks to study whether these binaries can be driven to merger by the…

High Energy Astrophysical Phenomena · Physics 2021-05-05 Ya-Ping Li , Adam M. Dempsey , Shengtai Li , Hui Li , Jiaru Li

Motivated by the increasing number of detections of merging black holes by LIGO-VIRGO-KAGRA, black hole (BH) binary mergers in the discs of active galactic nuclei (AGN) is investigated as a possible merger channel. In this pathway, BH…

Astrophysics of Galaxies · Physics 2023-07-12 Connar Rowan , Tjarda Boekholt , Bence Kocsis , Zoltán Haiman

LIGO/Virgo has detected several binary black hole (BBH) merger events that may have originated in the accretion disks of Active Galactic Nuclei (AGN). These events require individual black hole masses that fall within the pair instability…

High Energy Astrophysical Phenomena · Physics 2022-12-07 Adam M. Dempsey , Hui Li , Bhupendra Mishra , Shengtai Li

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…

High Energy Astrophysical Phenomena · Physics 2023-03-08 Nicholas Kaaz , Sophie Lund Schrøder , Jeff J. Andrews , Andrea Antoni , Enrico Ramirez-Ruiz

Stellar-mass binary black hole\,(BBH) mergers resulting from binary-single interactions\,(BSIs) in active galactic nucleus\,(AGN) disks are a potential source of gravitational wave\,(GW) events with measurable eccentricities. Previous…

High Energy Astrophysical Phenomena · Physics 2025-10-13 Mengye Wang , Qingwen Wu , Yiqiu Ma

We explore the evolution of stellar mass black hole binaries (BHBs) which are formed in the self-gravitating disks of active galactic nuclei (AGN). Hardening due to three-body scattering and gaseous drag are effective mechanisms that reduce…

Astrophysics of Galaxies · Physics 2017-01-03 Nicholas C. Stone , Brian D. Metzger , Zoltan Haiman

The accretion disks that fuel active galactic nuclei (AGN) may house numerous stars and compact objects, formed in situ or captured from nearby star clusters. Embedded neutron stars and black holes may form binaries and eventually merge,…

High Energy Astrophysical Phenomena · Physics 2023-10-31 Alexander J. Dittmann , Adam M. Dempsey , Hui Li

Stellar-mass binary black hole (BBH) mergers occurring within the disks of active galactic nuclei (AGN) are promising sources for gravitational waves detectable by the LIGO, Virgo, and KAGRA (LVK) interferometers. Some of these events have…

The dense and gaseous environments of active galactic nuclei (AGNs) can catalyze repeated mergers of stellar-mass black holes (BHs), potentially explaining the high-mass tail of binary black hole (BBH) mergers observed by LIGO-Virgo-KAGRA…

High Energy Astrophysical Phenomena · Physics 2025-08-22 Maria Paola Vaccaro

We investigate the thermodynamics of close encounters between stellar mass black holes (BHs) in the gaseous discs of active galactic nuclei (AGN), during which binary black holes (BBHs) may form. We consider a suite of 2D viscous…

High Energy Astrophysical Phenomena · Physics 2024-09-24 Henry Whitehead , Connar Rowan , Tjarda Boekholt , Bence Kocsis

Stellar mass, binary black hole (BBH) mergers dominates the sources of gravitational wave (GW) events so far detected by the LIGO/Virgo/KAGRA (LVK) experiment. The origin of these BBHs is unknown, and no electromagnetic (EM) counterpart has…

High Energy Astrophysical Phenomena · Physics 2025-03-28 Juan C. Rodríguez-Ramírez , Rodrigo Nemmen , Clécio R. Bom

Stellar-mass binary black holes (BBHs) embedded in active galactic nucleus (AGN) discs are possible progenitors of black-hole mergers detected in gravitational waves by LIGO/VIRGO. To better understand the hydrodynamical evolution of BBHs…

High Energy Astrophysical Phenomena · Physics 2022-09-21 Rixin Li , Dong Lai

Active galactic nucleus (AGN) disks may be important sites of binary black hole (BBH) mergers. Here we show via numerical experiments with the high-accuracy, high precision code {\tt SpaceHub} that broken symmetry in dynamical encounters in…

High Energy Astrophysical Phenomena · Physics 2022-01-05 Yihan Wang , Barry McKernan , Saavik Ford , Rosalba Perna , Nathan W. C. Leigh , Mordecai-Mark Mac Low

A population of binary stellar-mass black hole (BBH) mergers are believed to occur embedded in the accretion disk of active galactic nuclei (AGNs). In this {\em Letter}, we demonstrate that the jets from these BBH mergers can propagate…

High Energy Astrophysical Phenomena · Physics 2023-11-21 Jin-Ping Zhu

We study the close encounters between two single black holes (BHs) embedded in an AGN disk using a series of global 2D hydrodynamics simulations. We find that when the disk density is sufficiently high, bound BH binaries can be formed by…

High Energy Astrophysical Phenomena · Physics 2023-03-01 Jiaru Li , Adam M. Dempsey , Hui Li , Dong Lai , Shengtai Li

Binary black hole (BBH) evolution in the discs of active galactic nuclei (AGN) is a promising channel for gravitational wave (GW)-driven mergers. It is however unclear whether binaries interacting with the surrounding disc undergo orbital…

High Energy Astrophysical Phenomena · Physics 2024-12-04 W. Ishibashi , M. Gröbner

Stellar-mass binary black holes (BBHs) embedded in active galactic nucleus (AGN) discs offer a distinct dynamical channel to produce black hole mergers detected in gravitational waves by LIGO/Virgo. To understand their orbital evolution…

High Energy Astrophysical Phenomena · Physics 2024-01-15 Rixin Li , Dong Lai

There are indications that stellar-origin black holes (BHs) are efficiently paired up in binary black holes (BBHs) in Active Galactic Nuclei (AGN) disc environments, which can undergo interactions with single BHs in the disc. Such…

Astrophysics of Galaxies · Physics 2024-11-28 Gaia Fabj , Johan Samsing

Stellar-mass binary black hole\,(BBH) mergers within the accretion disks of active galactic nuclei may contribute to gravitational wave\,(GW) events detected by grounded-based GW detectors. In particular, the interaction between a BBH and a…

High Energy Astrophysical Phenomena · Physics 2025-04-17 Mengye Wang , Yiqiu Ma , Hui Li , Qingwen Wu , Ya-Ping Li , Xiangli Lei , Jiancheng Wu

Binary black hole (BBH) mergers are the primary sources of gravitational wave (GW) events detected by LIGO/Virgo. Binary black holes embedded in the accretion discs of active galactic nuclei (AGN) are possible candidates for such GW events.…

Astrophysics of Galaxies · Physics 2020-07-22 W. Ishibashi , M. Gröbner
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