Scalar-induced gravitational wave interpretation of PTA data: the role of scalar fluctuation propagation speed [PDF]
Journal of Cosmology and Astroparticle Physics, 2023 Pulsar timing arrays gathered evidence of the presence of a gravitational wave background around nHz frequencies. If the gravitational wave background was induced by large and Gaussian primordial fluctuations, they would then produce too many sub-solar ...
S. Balaji +2 more
semanticscholar +1 more source
Real-time gravitational-wave science with neural posterior estimation [PDF]
Physical Review Letters, 2021 We demonstrate unprecedented accuracy for rapid gravitational wave parameter estimation with deep learning. Using neural networks as surrogates for Bayesian posterior distributions, we analyze eight gravitational wave events from the first LIGO-Virgo ...
Maximilian Dax +5 more
semanticscholar +1 more source
On the Evidence for a Common-spectrum Process in the Search for the Nanohertz Gravitational-wave Background with the Parkes Pulsar Timing Array [PDF]
, 2021 A nanohertz-frequency stochastic gravitational-wave background can potentially be detected through the precise timing of an array of millisecond pulsars.
B. Goncharov +28 more
semanticscholar +1 more source
Black holes in galaxies: Environmental impact on gravitational-wave generation and propagation [PDF]
Physical Review D, 2021 We introduce a family of solutions of Einstein's gravity minimally coupled to an anisotropic fluid, describing asymptotically flat black holes with"hair"and a regular horizon.
V. Cardoso +4 more
semanticscholar +1 more source
Review of the Advanced LIGO Gravitational Wave Observatories Leading to Observing Run Four [PDF]
Galaxies, 2022 Gravitational waves from binary black hole and neutron star mergers are being regularly detected. As of 2021, 90 confident gravitational wave detections have been made by the LIGO and Virgo detectors.
C. Cahillane, G. Mansell
semanticscholar +1 more source
Gravitational Fields and Gravitational Waves [PDF]
Physics Essays, 2021 Abstract For any object with finite velocity, the relative velocity between them will affect the effect between them. This effect can be called the chasing effect (general Doppler effect). LIGO discovered gravitational waves and measured the speed of gravitational waves equal to the speed of light c. Gravitational waves are generated due to the
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Non-Gaussianity and the induced gravitational wave background [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 Scalar metric fluctuations generically source a spectrum of gravitational waves at second order in perturbation theory, poising gravitational wave experiments as potentially powerful probes of the small-scale curvature power spectrum.
Peter Adshead, K. Lozanov, Z. Weiner
semanticscholar +1 more source
The NANOGrav 12.5 yr Data Set: Search for an Isotropic Stochastic Gravitational-wave Background [PDF]
Astrophysical Journal Letters, 2020 We search for an isotropic stochastic gravitational-wave background (GWB) in the 12.5 yr pulsar-timing data set collected by the North American Nanohertz Observatory for Gravitational Waves.
Z. Arzoumanian +60 more
semanticscholar +1 more source
Applied Sciences, 2023 The Fabry–Pérot (FP) cavity is the essential component of an ultra-stable laser (USL) for gravitational wave detection, which couples multiple physics fields (optical/thermal/mechanical) and requires ultra-high precision.
Hang Zhao +5 more
doaj +1 more source
Gravitational Waves from Gravitational Collapse [PDF]
Living Reviews in Relativity, 2003 68 pages including 13 figures; revised version accepted for publication in Living Reviews in Relativity (http://www.livingreviews.org)
Chris L. Fryer, Kimberly C.B. New
openaire +9 more sources