Quiescent and active galactic nuclei as factories of merging compact objects in the era of gravitational wave astronomy

M Arca Sedda, S Naoz, B Kocsis - Universe, 2023 - mdpi.com
Galactic nuclei harbouring a central supermassive black hole (SMBH), possibly surrounded
by a dense nuclear cluster (NC), represent extreme environments that house a complex …

On the origin of GW190521-like events from repeated black hole mergers in star clusters

G Fragione, A Loeb, FA Rasio - The Astrophysical Journal …, 2020 - iopscience.iop.org
LIGO and Virgo have reported the detection of GW190521, from the merger of a binary black
hole (BBH) with a total mass around 150 M⊙. While current stellar models limit the mass of …

Repeated mergers, mass-gap black holes, and formation of intermediate-mass black holes in dense massive star clusters

G Fragione, B Kocsis, FA Rasio… - The Astrophysical …, 2022 - iopscience.iop.org
Current theoretical models predict a mass gap with a dearth of stellar black holes (BHs)
between roughly 50 M⊙ and 100 M⊙, while above the range accessible through massive …

Resolving the peak of the black hole mass spectrum

E Farag, M Renzo, R Farmer… - The Astrophysical …, 2022 - iopscience.iop.org
Gravitational-wave (GW) detections of binary black hole (BH) mergers have begun to
sample the cosmic BH mass distribution. The evolution of single stellar cores predicts a gap …

Black hole mergers from hierarchical triples in dense star clusters

MAS Martinez, G Fragione, K Kremer… - The Astrophysical …, 2020 - iopscience.iop.org
Hierarchical triples are expected to be produced by the frequent binary-mediated
interactions in the cores of globular clusters. In some of these triples, the tertiary companion …

A statistical solution to the chaotic, non-hierarchical three-body problem

NC Stone, NWC Leigh - Nature, 2019 - nature.com
The three-body problem is arguably the oldest open question in astrophysics and has
resisted a general analytic solution for centuries. Various implementations of perturbation …

Population synthesis of black hole binary mergers from star clusters

F Antonini, M Gieles - Monthly Notices of the Royal Astronomical …, 2020 - academic.oup.com
Black hole (BH) binary mergers formed through dynamical interactions in dense star clusters
are believed to be one of the main sources of gravitational waves (GWs) for Advanced LIGO …

Multiple Stellar Evolution: a population synthesis algorithm to model the stellar, binary, and dynamical evolution of multiple-star systems

AS Hamers, A Rantala, P Neunteufel… - Monthly Notices of …, 2021 - academic.oup.com
In recent years, observations have shown that multiple-star systems such as hierarchical
triple and quadruple-star systems are common, especially among massive stars. They are …

Merging black holes in the low-mass and high-mass gaps from 2+ 2 quadruple systems

G Fragione, A Loeb, FA Rasio - The Astrophysical Journal …, 2020 - iopscience.iop.org
Merging Black Holes in the Low-mass and High-mass Gaps from 2 + 2 Quadruple Systems -
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Was GW190412 born from a hierarchical 3+ 1 quadruple configuration?

AS Hamers, M Safarzadeh - The Astrophysical Journal, 2020 - iopscience.iop.org
Was GW190412 Born from a Hierarchical 3 + 1 Quadruple Configuration? - IOPscience This
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