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We study the long-term evolution of massive black hole binaries (MBHBs) at the centers of galaxies using detailed full three-body scattering experiments. Stars, drawn from a distribution unbound to the binary, are ejected by the…

Astrophysics · Physics 2007-05-23 F. Haardt , A. Sesana , P. Madau

We use full three-body scattering experiments to study the ejection of hypervelocity stars (HVSs) by massive black hole binaries (MBHBs) at the center of galaxies. Ambient stars drawn from a Maxwellian distribution unbound to the binary are…

Astrophysics · Physics 2008-11-26 A. Sesana , F. Haardt , P. Madau

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

The long-term evolution of massive black hole binaries at the centers of galaxies is studied in a variety of physical regimes, with the aim of resolving the ``final parsec problem,'' i.e., how black hole binaries manage to shrink to…

Astrophysics · Physics 2009-11-07 Milos Milosavljevic , David Merritt

In low-metallicity environments, massive stars might avoid supernova explosion and directly collapse, forming massive (~25-80 solar masses) stellar black holes (MSBHs), at the end of their life. MSBHs, when hosted in young massive clusters,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 M. Mapelli , E. Ripamonti , L. Zampieri , M. Colpi

The hierarchical galaxy formation picture suggests that super massive black holes (MBHs) observed in galactic nuclei today have grown from coalescence of massive black hole binaries (MBHB) after galaxy merging. Once the components of a MBHB…

Astrophysics of Galaxies · Physics 2015-04-13 Long Wang , Peter Berczik , Rainer Spurzem , M. B. N. Kouwenhoven

(Abridged) In this celebratory contribution, we present some new data from standard star cluster modelling containing primordial binaries and triples, as well as results from a binary black hole simulation with two massive members. In the…

Astrophysics · Physics 2007-05-23 Sverre Aarseth

We study the dynamical evolution of eccentric massive black hole binaries (MBHBs) interacting with unbound stars by means of an extensive set of three body scattering experiments. Compared to previous studies, we extend the investigation…

We use a hybrid N-body program to study the evolution of massive black hole binaries in the centers of galaxies, mainly to understand the factors affecting the binary eccentricity, the response of the galaxy to the binary merger, and the…

Astrophysics · Physics 2009-10-30 Gerald D. Quinlan , Lars Hernquist

The stellar ejection rate and the rates of change of the binary semimajor axis and eccentricity are derived from scattering experiments for the restricted three-body problem. They are used to study the evolution of binaries in simple models…

Astrophysics · Physics 2011-08-09 Gerald D. Quinlan

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

Massive black hole binaries (MBHBs) with masses of ~ 10^4 to ~ 10^10 of solar masses are one of the main targets for currently operating and forthcoming space-borne gravitational wave observatories. In this paper, we explore the effect of…

Astrophysics of Galaxies · Physics 2021-09-29 Ludovica Varisco , Elisa Bortolas , Massimo Dotti , Alberto Sesana

We analyze the dynamical evolution of binary stars that interact with a static background of single stars in the environment of a massive black hole (MBH). All stars are considered to be single mass, Newtonian point particles. We follow the…

Cosmology and Nongalactic Astrophysics · Physics 2009-08-03 Clovis Hopman

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

In galactic centers, stars and binaries can be injected into low-angular-momentum orbits, resulting in close encounters with the central supermassive black hole (SMBH). Previous works have shown that under different conditions, such close…

High Energy Astrophysical Phenomena · Physics 2024-12-20 Fangyuan Yu , Dong Lai

In this paper, the second in a series of two, we justify two important assumptions on which the result is based that in course of a galaxy merger the slingshot ejection of bound stars is sufficiently efficient to allow a supermassive black…

Astrophysics · Physics 2008-11-26 Christian Zier

In this letter we study the eccentricity evolution of a massive black hole (MBH) binary (MBHB) embedded in a rotating stellar cusp. Following the observation that stars on counter-rotating (with respect to the MBHB) orbits extract angular…

Astrophysics of Galaxies · Physics 2015-05-28 Alberto Sesana , Alessia Gualandris , Massimo Dotti

"Hard" massive black hole (MBH) binaries embedded in steep stellar cusps can shrink via three-body slingshot interactions. We show that this process will inevitably be accompanied by a burst of stellar tidal disruptions, at a rate that can…

Astrophysics of Galaxies · Physics 2010-01-15 X. Chen , P. Madau , A. Sesana , F. K. Liu

We construct evolutionary tracks for massive black hole binaries (MBHBs) embedded in a surrounding distribution of stars. The dynamics of the binary is evolved by taking into account the erosion of the central stellar cusp bound to the…

Cosmology and Nongalactic Astrophysics · Physics 2011-08-03 A. Sesana

Supermassive black hole binaries (BHBs) are expected to be one of the most powerful sources of low-frequency gravitational waves (GWs) for future space-borne detectors. Prior to the GW emission stage, BHBs evolving in gas-poor nuclei shrink…

Astrophysics of Galaxies · Physics 2018-05-18 Elisa Bortolas , Michela Mapelli , Mario Spera
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