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We present the results of a LIGO search for short-duration gravitational waves (GW) associated with soft gamma repeater (SGR) bursts. This is the first GW search sensitive to neutron star f-modes, usually considered the most efficient GW…

高能天体物理现象 · 物理学 2009-04-29 Peter Kalmus

The purpose of this mock data and science challenge is to prepare the data analysis and science interpretation for the second generation of gravitational-wave experiments Advanced LIGO-Virgo in the search for a stochastic gravitational-wave…

The stochastic gravitational wave background (SGWB) is a rich resource of cosmological information, encoded both in its source statistics and anisotropies induced by propagation effects. We provide a theoretical description of it, without…

宇宙学与河外天体物理 · 物理学 2023-07-17 Alice Garoffolo

We present a refined estimation of the stochastic gravitational wave background (SGWB) based on observed dual active galactic nuclei (AGNs) together with AGN X-ray luminosity functions, in light of recent Pulsar Timing Array detections of…

高能天体物理现象 · 物理学 2026-01-14 Katsunori Kusakabe , Yoshiyuki Inoue , Daisuke Toyouchi

We present a comprehensive forecast for cosmological constraints using the joint observation of the cosmic shear signal from the Chinese Space Station Survey Telescope (CSST) and the clustering signal from the next-generation gravitational…

宇宙学与河外天体物理 · 物理学 2026-02-24 Pengfei Su , Yan Gong , Qi Xiong , Dingao Hu , Hengjie Lin , Furen Deng , Xuelei Chen

Convincing evidence of a stochastic gravitational wave (GW) background has been found by the NANOGrav Collaboration in the 15-year data set. From this signal, we can evaluate the possibility of its source being from the early Universe…

宇宙学与河外天体物理 · 物理学 2024-08-30 Chris Choi , Jacob Magallanes , Murman Gurgenidze , Tina Kahniashvili

The Stochastic Gravitational-Wave Background (SGWB) is expected to be a key observable for Gravitational-Wave (GW) interferometry. Its detection will open a new window on early Universe cosmology, on the astrophysics of compact objects and,…

宇宙学与河外天体物理 · 物理学 2021-01-20 Lorenzo Valbusa Dall'Armi , Angelo Ricciardone , Nicola Bartolo , Daniele Bertacca , Sabino Matarrese

We employ the formalism developed in \cite{Mentasti:2023gmg} and \cite{Bartolo_2022} to study the prospect of detecting an anisotropic Stochastic Gravitational Wave Background (SGWB) with the Laser Interferometer Space Antenna (LISA) alone,…

广义相对论与量子宇宙学 · 物理学 2024-02-13 Giorgio Mentasti , Carlo R. Contaldi , Marco Peloso

Within its observational band the Laser Interferometer Space Antenna, LISA, will simultaneously observe orbital modulated waveforms from Galactic white dwarf binaries, a binary black hole produced gravitational-wave background, and…

广义相对论与量子宇宙学 · 物理学 2021-10-08 Guillaume Boileau , Astrid Lamberts , Nelson Christensen , Neil J. Cornish , Renate Meyer

The recent Advanced LIGO and Advanced Virgo joint observing runs have not claimed a stochastic gravitational-wave background detection, but one expects this to change as the sensitivity of the detectors improves. The challenge of claiming a…

广义相对论与量子宇宙学 · 物理学 2021-03-03 Katarina Martinovic , Patrick M. Meyers , Mairi Sakellariadou , Nelson Christensen

One potential factor that could impede searches for the stochastic gravitational-wave background (SGWB), arising from the incoherent superposition of a multitude of weak and unresolvable gravitational-wave signals in the Universe, is…

广义相对论与量子宇宙学 · 物理学 2025-10-16 Stavros Venikoudis , Federico De Lillo , Kamiel Janssens , Jishnu Suresh , Giacomo Bruno

Pulsar timing arrays aim to detect nanohertz-frequency gravitational waves (GWs). A background of GWs modulates pulsar arrival times and manifests as a stochastic process, common to all pulsars, with a signature spatial correlation. Here we…

The production of a primordial stochastic gravitational-wave background by processes occuring in the early Universe is expected in a broad range of models. Observing this background would open a unique window onto the Universe's…

One of the main pillars of the {\Lambda}CDM model is the Cosmological Principle, which states that our Universe is statistically isotropic and homogeneous on large scales. Here we test this hypothesis using the Astrophysical Gravitational…

宇宙学与河外天体物理 · 物理学 2022-12-06 Lorenzo Valbusa Dall'Armi , Angelo Ricciardone , Daniele Bertacca

Since the initial discovery of gravitational-waves from merging black holes, the LIGO Scientific Collaboration together with Virgo and KAGRA have published 90 gravitational-wave observations of compact binary mergers in the…

广义相对论与量子宇宙学 · 物理学 2022-09-09 Vera Del Favero

Disentangling the rich astrophysical structure of the stochastic gravitational-wave background (SGWB) from its cosmological component is essential for the Laser Interferometer Space Antenna (LISA) to access the physics of the early Universe…

宇宙学与河外天体物理 · 物理学 2025-06-25 Mesut Çalışkan , Neha Anil Kumar , Marc Kamionkowski , Sihao Cheng

A valuable target for advanced gravitational-wave detectors is the stochastic gravitational-wave background. The stochastic background imparts a weak correlated signal into networks of gravitational-wave detectors, and so standard searches…

高能天体物理现象 · 物理学 2018-12-26 Thomas Callister , Michael Coughlin , Jonah Kanner

String cosmology models predict a relic background of gravitational-wave (GW) radiation in the early universe. The GW energy spectrum of radiated power increases rapidly with the frequency, and therefore it becomes a potential and…

广义相对论与量子宇宙学 · 物理学 2023-04-19 Yang Jiang , Xi-Long Fan , Qing-Guo Huang

Given the recent detection of gravitational waves from individual sources it is almost a certainty that some form of background of gravitational waves will be detected in future. The most promising candidate for such a detection are…

天体物理仪器与方法 · 物理学 2019-01-31 A. I. Renzini , C. R. Contaldi

We build an analytical framework to study the observability of anisotropies and a net chiral polarization of the Stochastic Gravitational Wave Background (SGWB) with a generic network of ground-based detectors. We apply this formalism to…

广义相对论与量子宇宙学 · 物理学 2023-04-14 Giorgio Mentasti , Carlo Contaldi , Marco Peloso