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The initial separation of massive star binaries sets the timescale over which their compact remnants merge through the emission of gravitational waves. We show that the delay time distribution (DTD) of binary neutron stars or black holes…

High Energy Astrophysical Phenomena · Physics 2020-10-07 Mohammadtaher Safarzadeh , Sylvia Biscoveanu , Abraham Loeb

We constrain the distribution of merging compact binaries across the celestial sphere using the GWTC-3 catalog from the LIGO-Virgo-KAGRA Collaborations' (LVK) third observing run. With 63 confident detections from O3, we constrain the…

High Energy Astrophysical Phenomena · Physics 2023-03-01 Reed Essick , Will M. Farr , Maya Fishbach , Daniel E. Holz , Erik Katsavounidis

[Abridged] We investigate the detectability of the gravitational stochastic background produced by cosmological sources in scenarios of structure formation. The model considers the coalescences of three kind of binary systems: double…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Oswaldo D. Miranda

Gravitational wave noise associated with unresolved binary stars in the Galaxy is studied with the special aim of determining the upper frequency at which it stops to contribute at the rms noise level of the proposed space-born…

Astrophysics · Physics 2010-11-30 K. A. Postnov , M. E. Prokhorov

I review the expected Galactic sources of gravitational waves, concentrating on the low-frequency domain and summarise the current observational and theoretical knowledge we have. A model for the Galactic population of close binaries, which…

Astrophysics · Physics 2009-11-10 G. Nelemans

The first gravitational wave detections of mergers between black holes and neutron stars represent a remarkable new regime of high-energy transient astrophysics. The signals observed with LIGO-Virgo detectors come from mergers of extreme…

Solar and Stellar Astrophysics · Physics 2018-08-15 Matthias U. Kruckow , Thomas M. Tauris , Norbert Langer , Michael Kramer , Robert G. Izzard

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

We investigate the prospects of observing residual eccentricity in a population of compact binaries by calculating the power in the eccentric harmonics, following the methodology in arXiv:2411.04187. Although most observed compact binary…

High Energy Astrophysical Phenomena · Physics 2025-12-09 Mukesh Kumar Singh , Ben G. Patterson , Stephen Fairhurst

The merger rate of black hole binaries inferred from the detections in the first Advanced LIGO science run, implies that a stochastic background produced by a cosmological population of mergers will likely mask the primordial…

Cosmology and Nongalactic Astrophysics · Physics 2017-04-19 T. Regimbau , M. Evans , N. Christensen , E. Katsavounidis , B. Sathyaprakash , S. Vitale

The recent Advanced LIGO detection of gravitational waves from the binary black hole GW150914 suggests there exists a large population of merging binary black holes in the Universe. Although most are too distant to be individually resolved…

General Relativity and Quantum Cosmology · Physics 2016-08-17 Thomas Callister , Letizia Sammut , Shi Qiu , Ilya Mandel , Eric Thrane

Reconstructing the properties of the astrophysical population of binary compact objects in the universe is a key science goal of gravitational wave detectors. This goal is hindered by the finite strain, frequency sensitivity and observing…

General Relativity and Quantum Cosmology · Physics 2025-03-21 Jam Sadiq , Kallol Dey , Thomas Dent , Enrico Barausse

Basic aspects of the background of gravitational waves and its mathematical characterization are reviewed. The spectral energy density parameter $\Omega(f)$, commonly used as a quantifier of the background, is derived for an ensemble of…

General Relativity and Quantum Cosmology · Physics 2011-10-05 Pablo A. Rosado

We compute the gravitational wave background (GWB) generated by a cosmological population of (BH-BH) binaries using hybrid waveforms recently produced by numerical simulations of (BH-BH) coalescence, which include the inspiral, merger and…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 S. Marassi , R. Schneider , G. Corvino , V. Ferrari , S. Portegies Zwart

In paper I of this series we showed that a large percentage of the binary black hole (BBH) mergers that form through dynamical interactions in globular clusters will have significant eccentricity in the ~10^{-3}-10^{-1} Hz LISA band. In…

High Energy Astrophysical Phenomena · Physics 2018-10-19 Daniel J. D'Orazio , Johan Samsing

We investigate the isotropic and anisotropic components of the Stochastic Gravitational Wave Background (SGWB) originated from unresolved merging compact binaries in galaxies. We base our analysis on an empirical approach to galactic…

General Relativity and Quantum Cosmology · Physics 2021-11-16 Giulia Capurri , Andrea Lapi , Carlo Baccigalupi , Lumen Boco , Giulio Scelfo , Tommaso Ronconi

A new generation of ground-based interferometric detectors for gravitational waves is currently under construction or has entered the commissioning phase (LIGO, VIRGO, GEO600, TAMA). We study the most promising candidate sources for these…

Astrophysics · Physics 2014-10-13 Krzysztof Belczynski , Vassiliki Kalogera , Tomasz Bulik

Binary Systems are the most studied sources of gravitational waves. The mechanisms of emission and the behavior of the orbital parameters are well known and can be written in analytic form in several cases. Besides, the strongest indication…

Cosmology and Nongalactic Astrophysics · Physics 2015-04-24 E. F. D. Evangelista , J. C. N. de Araujo

The current gravitational wave (GW) detectors have successfully observed many binary compact objects, and the third generation ground-based GW detectors such as Einstein telescope and space-borne detectors such as LISA will start their GW…

High Energy Astrophysical Phenomena · Physics 2022-11-15 Kotaro Hijikawa , Tomoya Kinugawa , Ataru Tanikawa , Takashi Yoshida , Hideyuki Umeda

The dynamics of coalescing compact binaries can be affected by the environment in which the systems evolve, leaving detectable signatures into the emitted gravitational signal. In this paper we investigate the ability of gravitational-wave…

High Energy Astrophysical Phenomena · Physics 2021-01-06 Vitor Cardoso , Andrea Maselli

The Galaxy is suspected to contain hundreds of millions of binary white dwarf systems, a large fraction of which will have sufficiently small orbital period to emit gravitational radiation in band for space-based gravitational wave…

General Relativity and Quantum Cosmology · Physics 2013-05-29 Tyson B. Littenberg
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