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Evolution of self-gravitating rotating dense stellar systems (e.g. globular clusters, galactic nuclei) with embedded black holes is investigated. The interaction between the black hole and stellar component in differential rotating…

Astrophysics · Physics 2010-02-04 J. Fiestas , R. Spurzem

We investigate the orbital eccentricity evolution of supermassive black hole binaries within galactic environments. We analyze the dynamics in triaxial merger remnants and subsequent interactions with geometrically thick nuclear discs. We…

This paper focuses on the dynamical implications of close supermassive black hole binaries both as an example of resonant phase mixing and as a potential explanation of inversions and other anomalous features observed in the luminosity…

Astrophysics · Physics 2009-11-07 Henry E. Kandrup , Ioannis V. Sideris , Balsa Terzic , Courtlandt L. Bohn

In the high density cores of globular clusters, multibody interactions are expected to be common, with the result that black holes in binaries are hardened by interactions. It was shown by Sigurdsson & Hernquist (1993) and others that 10…

Astrophysics · Physics 2009-11-07 M. Coleman Miller , Douglas P. Hamilton

During a galaxy merger, the supermassive black hole (SMBH) in each galaxy is thought to sink to the center of the potential and form a supermassive black hole binary; this binary can eject stars via 3-body scattering, bringing the SMBHs…

Astrophysics of Galaxies · Physics 2015-09-23 Kelly Holley-Bockelmann , Fazeel Mahmood Khan

This paper is the third in a series presenting the results of direct numerical integrations of the Fokker-Planck equation for stars orbiting a supermassive black hole (SBH) at the center of a galaxy. The algorithm of Paper II included…

Astrophysics of Galaxies · Physics 2016-03-01 David Merritt

Binary black-hole coalescence is treated semi-analytically by a novel approach. Our prescription employs the conservative Skeleton Hamiltonian that describes orbiting Brill-Lindquist wormholes (termed punctures in Numerical Relativity)…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Achamveedu Gopakumar , Gerhard Schaefer

The formation of massive black hole binaries (MBHBs) is an unavoidable outcome of galaxy evolution via successive mergers. However, the mechanism that drives their orbital evolution from parsec separations down to the gravitational wave…

High Energy Astrophysical Phenomena · Physics 2017-08-04 Felipe G. Goicovic , Alberto Sesana , Jorge Cuadra , Federico Stasyszyn

We investigated the dynamical evolution of clusters of galaxies in virial equilibrium using Fokker-Planck models and self-consistent N-body models. In particular, we focused on the growth of a common halo, which is a cluster-wide halo…

Astrophysics · Physics 2015-06-24 K. Takahashi , T. Sensui , Y. Funato , J. Makino

[ABRIDGED] We study supermassive black hole binary mergers driven by angular momentum loss to small-scale gas discs. Such binaries form after major galaxy mergers, but their fate is unclear since hardening through stellar scattering becomes…

Astrophysics · Physics 2009-03-08 J. Cuadra , P. J. Armitage , R. D. Alexander , M. C. Begelman

For a pair of supermassive black holes (SMBHs) in the remnant of a dual galaxy merger, well-known models exist to describe their dynamical evolution until the final coalescence accompanied by the emission of a low-frequency gravitational…

Astrophysics of Galaxies · Physics 2023-10-04 Hauke Koehn , Andreas Just , Peter Berczik , Michael Tremmel

In this work I summarize a model of binary stellar evolution involving Case C mass transfer followed by a common envelope that strips away the hydrogen from the core of the primary star at the cost of shrinking the orbital separation and…

Solar and Stellar Astrophysics · Physics 2013-05-27 Enrique Moreno Méndez

Most galaxies have central massive black holes (BH), and merge with others during their evolution, as strongly suggested by recent observations. Consequently a black hole binary (BHB) emerges. Considering the evolution of the binary when it…

Astrophysics · Physics 2009-11-06 Christian Zier , Peter L. Biermann

We propose a new scenario for the evolution of a binary of primordial black holes (PBHs). We consider a dynamical friction by ambient dark matter, scattering of dark matter particles with a highly eccentric orbit besides the standard…

Cosmology and Nongalactic Astrophysics · Physics 2016-08-31 Kimitake Hayasaki , Keitaro Takahashi , Yuuiti Sendouda , Shigehiro Nagataki

Since many or most galaxies have central massive black holes (BHs), mergers of galaxies can form massive binary black holes (BBHs). In this paper, we study the evolution of massive BBHs in realistic galaxy models, using a generalization of…

Astrophysics · Physics 2009-11-07 Qingjuan Yu

We develop a formalism for studying the dynamics of massive black hole binaries embedded in gravitationally-bound stellar cusps, and study the binary orbital decay by three-body interactions, the impact of stellar slingshots on the density…

Astrophysics · Physics 2009-11-13 Alberto Sesana , Francesco Haardt , Piero Madau

Using a one-dimensional height integrated model, we calculate the evolution of an unequal mass binary black hole with a coplanar gas disk that contains a gap due to the presence of the secondary black hole. Viscous evolution of the outer…

High Energy Astrophysical Phenomena · Physics 2015-05-13 P. Chang , L. E. Strubbe , K. Menou , E. Quataert

The precise modeling of binary black hole coalescences in generic planar orbits is a crucial step to disentangle dynamical and isolated binary formation channels through gravitational-wave observations. The merger regime of such…

General Relativity and Quantum Cosmology · Physics 2024-04-26 Gregorio Carullo , Simone Albanesi , Alessandro Nagar , Rossella Gamba , Sebastiano Bernuzzi , Tomas Andrade , Juan Trenado

The N-independence observed in the evolution of massive black hole binaries (MBHBs) in recent simulation of merging stellar bulges suggests a simple interpretation beyond complex time-dependent relaxation processes. We conjecture that the…

Astrophysics of Galaxies · Physics 2015-10-07 Alberto Sesana , Fazeel Mahmood Khan

The growing population of binary black holes (BBHs) observed by gravitational wave detectors is a potential Rosetta stone for understanding their formation channels. Here, we use an upgraded version of our semi-analytic codes {\sc…

High Energy Astrophysical Phenomena · Physics 2022-03-02 Michela Mapelli , Yann Bouffanais , Filippo Santoliquido , Manuel Arca Sedda , M. Celeste Artale
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