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Related papers: Impact of inter-correlated initial binary paramete…

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We have studied the effects of various initial mass functions (IMFs) on the chemical evolution of the Sagittarius dwarf galaxy (Sgr). In particular, we tested the effects of the integrated galactic initial mass function (IGIMF) on various…

Star clusters can interact and merge in galactic discs, halos, or centers. We present direct N-body simulations of binary mergers of star clusters with $M_{\star} = 2.7 \times 10^4 \: \mathrm{M_{\odot}}$ each, using the N-body code BIFROST…

Astrophysics of Galaxies · Physics 2025-03-18 Lazaros Souvaitzis , Antti Rantala , Thorsten Naab

Detached WD+MS PCEBs are perhaps the most suitable objects for testing predictions of close-compact binary-star evolution theories, in particular, CE evolution. The population of WD+MS PCEBs has been simulated by several authors in the past…

Solar and Stellar Astrophysics · Physics 2014-09-05 M. Zorotovic , M. R. Schreiber , E. García-Berro , J. Camacho , S. Torres , A. Rebassa-Mansergas , B. T. Gänsicke

Gravitational-wave observations have the capability to strongly differentiate between different assumptions for how binary compact objects form. In this work, we show how to carefully interpolate a marginal likelihood between choices of…

General Relativity and Quantum Cosmology · Physics 2023-07-11 Vera Delfavero , Richard O'Shaughnessy , Krzysztof Belczynski , Paweł Drozda , Daniel Wysocki

Compact binary mergers that involve at least one neutron star, either binary neutron star or black hole--neutron star coalescences, are thought to be the potential sources of electromagnetic emission due to the material ejected during the…

High Energy Astrophysical Phenomena · Physics 2023-09-08 Yan Li , Rong-Feng Shen

Mergers of black hole (BH) and neutron star (NS) binaries are expected to be observed by gravitational wave observatories in the coming years. Until now, LIGO has only set an upper limit on this merger rate. BH-NS binaries are expected to…

Astrophysics of Galaxies · Physics 2019-05-08 Giacomo Fragione , Abraham Loeb

Black hole-neutron star (BHNS) binaries are amongst promising candidates for the joint detection of electromagnetic (EM) signals with gravitational waves (GWs) and are expected to be detected in the near future. Here we study the effect of…

High Energy Astrophysical Phenomena · Physics 2021-12-22 Mukul Bhattacharya , Pawan Kumar , George Smoot

We investigate the evolution of intermediate-mass (IMBHs), stellar (BHs) and binary black holes (BHBs), deposited near a supermassive black hole (SMBH) by a population of massive star clusters. Stellar BHs rapidly segregate around the SMBH,…

Astrophysics of Galaxies · Physics 2018-11-28 Manuel Arca-Sedda , Roberto Capuzzo-Dolcetta

Using a population synthesis approach, we compute the total merger rate in the local Universe for double neutron stars, double black holes, and black hole -- neutron star binaries. These compact binaries are the prime source candidates for…

Recent studies of white dwarfs in open clusters have provided new constraints on the initial - final mass relationship (IFMR) for main sequence stars with masses in the range 2.5 - 6.5 Mo. We re-evaluate the ensemble of data that determines…

Astrophysics · Physics 2009-11-11 L. Ferrario , D. Wickramasinghe , J. Liebert , K. A. Williams

The maximum mass of black holes formed in isolated binaries is determined by stellar winds and the interactions between the binary components. We consider for the first time fully self-consistent detailed stellar structure and binary…

In this paper, we study the secular dynamical evolution of binaries composed of intermediate-mass and stellar-mass black holes (IMBHs and SBHs, respectively) in orbit about a central super-massive black hole (SMBH) in galactic nuclei. Such…

Astrophysics of Galaxies · Physics 2018-08-29 Giacomo Fragione , Nathan Leigh

Hierarchical black hole (BH) mergers are one of the most straightforward mechanisms to produce BHs inside and above the pair-instability mass gap. Here, we investigate the impact of globular cluster (GC) evolution on hierarchical mergers,…

High Energy Astrophysical Phenomena · Physics 2024-08-14 Stefano Torniamenti , Michela Mapelli , Carole Périgois , Manuel Arca Sedda , M. Celeste Artale , Marco Dall'Amico , M. Paola Vaccaro

Although their existence is not yet confirmed observationally, intermediate mass black holes (IMBHs) may play a key role in the dynamics of galactic nuclei. In this paper, we neglect the effect of the nuclear star cluster itself and…

Astrophysics of Galaxies · Physics 2020-04-15 Barnabás Deme , Yohai Meiron , Bence Kocsis

We investigate the evolution of star clusters containing intermediate-mass black hole (IMBH) of $300$ to $5000\ \mathrm{M}_\odot$, focusing on the formation and evolution of IMBH-stellar mass black holes (SBHs; $M_{\rm BH} \lesssim 10^2\…

Astrophysics of Galaxies · Physics 2025-03-31 Seungjae Lee , Hyung Mok Lee , Ji-hoon Kim , Rainer Spurzem , Jongsuk Hong , Eunwoo Chung

Repeated mergers of stellar-mass black holes (BHs) in dense star clusters can produce intermediate-mass black holes (IMBHs). In particular, nuclear star clusters at the centers of galaxies have deep enough potential wells to retain most of…

High Energy Astrophysical Phenomena · Physics 2022-07-20 Giacomo Fragione , Abraham Loeb , Bence Kocsis , Frederic A. Rasio

Over the past 15 years, the evidence has clearly demonstrated that massive black hole (MBH) binary merger timescales depend strongly on the structural and kinematic properties of their host galaxy. Stellar density, gas content, shape and…

Supermassive black hole (SMBH) binaries represent the main target for missions such as the Laser Interferometer Space Antenna and Pulsar Timing Arrays. The understanding of their dynamical evolution prior to coalescence is therefore crucial…

Astrophysics of Galaxies · Physics 2021-02-17 Imran Nasim , Cristobal Petrovich , Adam Nasim , Fani Dosopoulou , Fabio Antonini

In this paper, we consider triple systems composed of main-sequence (MS) stars, and their internal evolution due to stellar and binary evolution. Our focus is on triples that produce white dwarfs (WDs), where Roche lobe overflow of an…

Solar and Stellar Astrophysics · Physics 2020-06-24 N. W. C. Leigh , S. Toonen , S. F. Portegies Zwart , R. Perna

We calculate the first dynamical evolutions of merging black hole-neutron star binaries that construct the combined black hole-neutron star spacetime in a general relativistic framework. We treat the metric in the conformal flatness…