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We calculate the gravitational wave signal from the growth of 10 million solar mass supermassive black holes (SMBH) from the remnants of Population III stars. The assembly of these lower mass black holes is particularly important because…

Cosmology and Nongalactic Astrophysics · Physics 2010-04-30 Kelly Holley-Bockelmann , Miroslav Micic , Steinn Sigurdsson , Louis Rubbo

Massive young clusters (YCs) are expected to host intermediate-mass black holes (IMBHs) born via runaway collapse. These IMBHs are likely in binaries and can undergo mergers with other compact objects, such as stellar mass black holes (BHs)…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-21 M. Mapelli , C. Huwyler , L. Mayer , Ph. Jetzer , A. Vecchio

We present the first fully relativistic longterm numerical evolutions of three equal-mass black holes in a system consisting of a third black hole in a close orbit about a black-hole binary. We find that these close-three-black-hole systems…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Manuela Campanelli , Carlos O. Lousto , Yosef Zlochower

Over the next decade, third-generation interferometers and the space-based LISA mission will observe binaries in galactic centers involving supermassive black holes with millions of solar masses. More precise measurements of more extreme…

General Relativity and Quantum Cosmology · Physics 2023-08-09 Francisco Duque

Three-body interactions are expected to be common in globular clusters and in galactic cores hosting supermassive black holes. Here we consider an equal-mass binary-black-hole system in the presence of a third black hole. Using numerically…

Astrophysics · Physics 2009-11-13 Manuela Campanelli , Miranda Dettwyler , Mark Hannam , Carlos O. Lousto

Contrary to supermassive and stellar-mass black holes (SBHs), the existence of intermediate-mass black holes (IMBHs) with masses ranging between 10^{2-5} Msun has not yet been confirmed. The main problem in the detection is that the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Symeon Konstantinidis , Pau Amaro-Seoane , Kostas D. Kokkotas

Observations suggest that star clusters often form in binaries or larger bound groups. Therefore, mergers between two clusters are likely to occur. If these clusters both harbor an intermediate-mass black hole (IMBH; 10^{2-4} Msun) in their…

Astrophysics · Physics 2009-11-11 Pau Amaro-Seoane , Marc Freitag

We present the first results in a new program intended to make the best use of all available technologies to provide an effective understanding of waves from inspiralling black hole binaries in time for imminent observations. In particular,…

General Relativity and Quantum Cosmology · Physics 2010-04-06 J. Baker , B. Bruegmann , M. Campanelli , C. O. Lousto

Building up on previous work, we present a new calculation of the gravitational wave (GW) emission generated during the transition from quasi-circular inspiral to plunge, merger and ringdown by a binary system of nonspinning black holes, of…

General Relativity and Quantum Cosmology · Physics 2010-12-15 Sebastiano Bernuzzi , Alessandro Nagar

To explain both the dynamics of a globular cluster and its production of gravitational waves from coalescing binary black holes, it is necessary to understand its population of dynamically-formed (or, `three-body') binaries. We provide a…

Astrophysics of Galaxies · Physics 2023-12-06 Daniel Marín Pina , Mark Gieles

There is a high level of interest in black hole-neutron star binaries, not only because their mergers may be detected by gravitational wave observatories in the coming years, but also because of the possibility that they could explain a…

High Energy Astrophysical Phenomena · Physics 2012-06-06 William E. East , Frans Pretorius , Branson C. Stephens

In this paper we study the dynamical outcome in which black hole (BH) binary-single interactions lead to two successive gravitational wave (GW) mergers; a scenario we refer to as a `double GW merger'. The first GW merger happens during the…

High Energy Astrophysical Phenomena · Physics 2018-08-29 Johan Samsing , Teva Ilan

Black hole binary systems embedded in AGN discs have been proposed as a source of the observed gravitational waves (GWs) from LIGO-Virgo-KAGRA. Studies have indicated binary-single encounters could be common place within this population,…

Astrophysics of Galaxies · Physics 2025-01-16 Connar Rowan , Henry Whitehead , Gaia Fabj , Pankaj Saini , Bence Kocsis , Martin Pessah , Johan Samsing

Gravitational waves from binary black hole pairs have emerged as an important observational tool in current times. The energy of the BH - BH binary pair is radiated in the form of gravitational waves and to compensate for that energy,…

General Relativity and Quantum Cosmology · Physics 2018-10-11 Shibaji Banerjee , Ashadul Halder , Sanjay K. Ghosh , Sibaji Raha , Debasish Majumdar

This paper studies the formation and evolution of binary supermassive black holes (SMBHs) in rotating galactic nuclei, focusing on the role of stellar dynamics. We present the first N-body simulations that follow the evolution of the SMBHs…

Astrophysics · Physics 2011-02-11 Ingo Berentzen , Miguel Preto , Peter Berczik , David Merritt , Rainer Spurzem

We study the production of primordial black hole (PBH) binaries and the resulting merger rate, accounting for an extended PBH mass function and the possibility of a clustered spatial distribution. Under the hypothesis that the gravitational…

Cosmology and Nongalactic Astrophysics · Physics 2018-05-24 Martti Raidal , Ville Vaskonen , Hardi Veermäe

We study the gravitational wave (GW) phase shift arising from center-of-mass accelerations of binary black hole mergers formed dynamically in three-body systems, where both the inner orbit of the merging binary and the outer orbit are…

General Relativity and Quantum Cosmology · Physics 2024-08-21 Kai Hendriks , Lorenz Zwick , Johan Samsing

Globular clusters (GCs) may harbour intermediate-mass black holes (IMBHs) at their centres. In these dynamically active environments stellar-mass black holes (SBHs) sink to the center soon after formation, due to dynamical friction and…

Astrophysics of Galaxies · Physics 2019-07-31 Giacomo Fragione , Omer Bromberg

Recent breakthroughs in the field of numerical relativity have led to dramatic progress in understanding the predictions of General Relativity for the dynamical interactions of two black holes in the regime of very strong gravitational…

General Relativity and Quantum Cosmology · Physics 2011-02-18 Joan M. Centrella , John G. Baker , Bernard J. Kelly , James R. van Meter

Largely motivated by the development of highly sensitive gravitational-wave detectors, our understanding of merging compact binaries and the gravitational waves they generate has improved dramatically in recent years. Breakthroughs in…

Cosmology and Nongalactic Astrophysics · Physics 2010-01-15 Scott A. Hughes