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Mergers of black hole-neutron star (BHNS) binaries have now been observed by GW detectors with the recent announcement of GW200105 and GW200115. Such observations not only provide confirmation that these systems exist, but will also give…

We evaluate the redshift distribution of binary black hole (BBH), black hole - neutron star binary (BHNS) and binary neutron star (BNS) mergers, exploring the main sources of uncertainty: star formation rate (SFR) density, metallicity…

High Energy Astrophysical Phenomena · Physics 2021-02-12 Filippo Santoliquido , Michela Mapelli , Nicola Giacobbo , Yann Bouffanais , M. Celeste Artale

We perform a systematic study of merging black hole (BH) binaries with compact star (CS) companions, including black hole--white dwarf (BH--WD), black hole--neutron star (BH--NS) and black hole--black hole (BH--BH) systems. Previous studies…

High Energy Astrophysical Phenomena · Physics 2021-10-27 Yong Shao , Xiang-Dong Li

Gravitational wave detectors are observing compact object mergers from increasingly far distances, revealing the redshift evolution of the binary black hole (BBH) -- and soon the black hole-neutron star (BHNS) and binary neutron star (BNS)…

High Energy Astrophysical Phenomena · Physics 2024-05-06 Adam Boesky , Floor S. Broekgaarden , Edo Berger

The observed sample of double neutron-star (NS-NS) binaries presents a challenge to population-synthesis models of compact object formation: the parameters entering into these models must be carefully chosen so as to match (i) the observed…

Astrophysics · Physics 2009-04-03 R. O'Shaughnessy , C. Kim , T. Frakgos , V. Kalogera , K. Belczynski

The last decade of observational and theoretical developments in stellar and binary evolution provides an opportunity to incorporate major improvements to the predictions from populations synthesis models. We compute the Galactic merger…

High Energy Astrophysical Phenomena · Physics 2015-06-04 Michal Dominik , Krzysztof Belczynski , Christopher Fryer , Daniel Holz , Emanuele Berti , Tomasz Bulik , Ilya Mandel , Richard O'Shaughnessy

Six gravitational wave detections have been reported so far, providing crucial insights on the merger rate of double compact objects. We investigate the cosmic merger rate of double neutron stars (DNSs), neutron star-black hole binaries…

High Energy Astrophysical Phenomena · Physics 2018-07-04 Michela Mapelli , Nicola Giacobbo

The development of advanced gravitational wave (GW) observatories, such as Advanced LIGO and Advanced Virgo, provides impetus to refine theoretical predictions for what these instruments might detect. In particular, with the range…

In this work we study the formation of the first two black hole-neutron star (BHNS) mergers detected in gravitational waves (GW200115 and GW200105) from massive stars in wide isolated binary systems - the isolated binary evolution channel.…

High Energy Astrophysical Phenomena · Physics 2021-10-13 Floor S. Broekgaarden , Edo Berger

The merger rate density evolution of binary compact objects and the properties of their host galaxies carry crucial information to understand the sources of gravitational waves. Here, we present galaxyRate, a new code that estimates the…

High Energy Astrophysical Phenomena · Physics 2022-09-29 Filippo Santoliquido , Michela Mapelli , M. Celeste Artale , Lumen Boco

Gravitational wave detectors are observing an increasing number of binary black hole (BBH) mergers, revealing a bimodal mass distribution of BBHs, which hints at diverse formation histories for these systems. Using the rapid binary…

High Energy Astrophysical Phenomena · Physics 2025-10-10 Lei Li , Guoliang Lv , Chunhua Zhu , Sufen Guo , Hongwei Ge , Weimin Gu , Zhuowen Li , Xiaolong He

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

Next-generation gravitational wave detectors are expected to detect millions of compact binary mergers across cosmological distances. The features of the mass distribution of these mergers, combined with gravitational wave distance…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-30 Soumendra Kishore Roy , Lieke A. C. van Son , Anarya Ray , Will M. Farr

There are important but unresolved processes in the standard formation scenarios of double compact star binaries (DCBs; BH-BH, BH-NS, NS-NS systems), such as mass transfer and the common envelope (CE) phase. We analyze the effects of…

High Energy Astrophysical Phenomena · Physics 2018-10-29 Iminhaji Ablimit , Keiichi Maeda

We perform a first study of the impact of varying two components of the initial conditions in binary population synthesis of compact binary mergers - the initial mass function, which is made metallicity- and star formation rate-dependent,…

High Energy Astrophysical Phenomena · Physics 2024-11-27 L. M. de Sá , L. S. Rocha , A. Bernardo , R. R. A. Bachega , J. E. Horvath

Six gravitational wave events have been reported by the LIGO-Virgo collaboration (LVC), five of them associated with black hole binary (BHB) mergers and one with a double neutron star (DNS) merger, while the coalescence of a black…

High Energy Astrophysical Phenomena · Physics 2019-05-22 Nicola Giacobbo , Michela Mapelli

We investigate the Stochastic Gravitational Wave Background (SGWB) produced by merging binary black holes (BBHs) and binary neutron stars (BNSs) in the frequency ranges of LIGO/Virgo/Kagra and LISA. We develop three analytical models, that…

High Energy Astrophysical Phenomena · Physics 2023-09-28 Leonard Lehoucq , Irina Dvorkin , Rahul Srinivasan , Clement Pellouin , Astrid Lamberts

Binary black holes (BBHs) are one of the endpoints of isolated binary evolution, and their mergers a leading channel for gravitational wave events. Here, using the evolutionary code \textsc{StarTrack}, we study the statistical properties of…

High Energy Astrophysical Phenomena · Physics 2018-04-19 Rosalba Perna , Martyna Chruslinska , Alessandra Corsi , Krzysztof Belczynski

Future searches for gravitational waves from space will be sensitive to double compact objects (DCOs) in our Milky Way. We present new simulations of the populations of double black holes (BHBHs), black hole neutron stars (BHNSs) and double…

High Energy Astrophysical Phenomena · Physics 2022-10-12 Tom Wagg , Floor S. Broekgaarden , Selma E. de Mink , Lieke A. C. van Son , Neige Frankel , Stephen Justham

Observations of black hole-neutron star (BH-NS) mergers via gravitational waves (GWs) are of great interest for their electromagnetic counterparts, such as short gamma-ray bursts, and could provide crucial information on the nature of BHs…

Astrophysics of Galaxies · Physics 2019-10-23 Giacomo Fragione , Abraham Loeb
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