Oscillatory amplitude of stochastic gravitational wave spectrum
Sign Up to like & getrecommendations! Published in 2022 at "Indian Journal of Physics"
DOI: 10.1007/s12648-022-02325-z
Abstract: Stochastic gravitational waves generated from early universe are placed in the squeezed vacuum state. The quantum effect on the stochastic gravitational waves leads to enhancement of its spectral amplitude in the long wavelength regime and… read more here.
Keywords: gravitational waves; stochastic gravitational; amplitude stochastic; oscillatory amplitude ... See more keywords
The stochastic gravitational-wave background in the absence of horizons
Sign Up to like & getrecommendations! Published in 2018 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/aae1de
Abstract: Gravitational-wave astronomy has the potential to explore one of the deepest and most puzzling aspects of Einstein's theory: the existence of black holes. A plethora of ultracompact, horizonless objects have been proposed to arise in… read more here.
Keywords: black holes; gravitational wave; wave; stochastic gravitational ... See more keywords
Probing non-Gaussian stochastic gravitational wave backgrounds with LISA
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/11/034
Abstract: The stochastic gravitational wave background (SGWB) contains a wealth of information on astrophysical and cosmological processes. A major challenge of upcoming years will be to extract the information contained in this background and to disentangle… read more here.
Keywords: non gaussian; stochastic gravitational; point function; gravitational wave ... See more keywords
Searching for bispectrum of stochastic gravitational waves with pulsar timing arrays
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/03/032
Abstract: We study how to probe bispectra of stochastic gravitational waves with pulsar timing arrays. The bispectrum is a key to probe the origin of stochastic gravitational waves. In particular, the shape of the bispectrum carries… read more here.
Keywords: gravitational waves; stochastic gravitational; timing arrays; waves pulsar ... See more keywords
Measuring the net circular polarization of the stochastic gravitational wave background with interferometers
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2020/05/028
Abstract: Parity violating interactions in the early Universe can source a stochastic gravitational wave background (SGWB) with a net circular polarization. In this paper, we study possible ways to search for circular polarization of the SGWB… read more here.
Keywords: gravitational wave; polarization; circular polarization; stochastic gravitational ... See more keywords
Phase transitions in an expanding universe: stochastic gravitational waves in standard and non-standard histories
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/01/001
Abstract: We undertake a careful analysis of stochastic gravitational wave production from cosmological phase transitions in an expanding universe, studying both a standard radiation as well as a matter dominated history. We analyze in detail the… read more here.
Keywords: gravitational wave; phase transitions; stochastic gravitational; transitions expanding ... See more keywords
Probing primordial features with the stochastic gravitational wave background
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/03/005
Abstract: The stochastic gravitational wave background (SGWB) offers a new opportunity to observe signals of primordial features from inflationary models. We study their detectability with future space-based gravitational waves experiments, focusing our analysis on the frequency… read more here.
Keywords: stochastic gravitational; primordial features; wave background; gravitational wave ... See more keywords
Measuring parity violation in the Stochastic Gravitational Wave Background with the LISA-Taiji network
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/03/069
Abstract: Parity violation is a powerful observable to distinguish a cosmological background of Gravitational Waves (GWs) from an astrophysical one. Planar single GW interferometers, both on ground and in space, are unable to measure the net… read more here.
Keywords: parity violation; gravitational wave; stochastic gravitational; background ... See more keywords
The nightmare scenario: measuring the stochastic gravitational-wave background from stalling massive black-hole binaries with pulsar-timing arrays
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx1454
Abstract: Massive black hole binaries, formed when galaxies merge, are among the primary sources of gravitational waves targeted by ongoing pulsar timing array (PTA) experiments and the upcoming space-based Laser Interferometer Space Antenna (LISA) interferometer. However,… read more here.
Keywords: gravitational wave; scenario; black hole; stochastic gravitational ... See more keywords
Stochastic gravitational wave background mapmaking using regularized deconvolution
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.043541
Abstract: Obtaining a faithful source intensity distribution map of the sky from noisy data demands incorporating known information of the expected signal, especially when the signal is weak compared to the noise. We introduce a widely… read more here.
Keywords: gravitational wave; wave background; background; stochastic gravitational ... See more keywords
Accurate characterization of the stochastic gravitational-wave background with pulsar timing arrays by likelihood reweighting
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.107.084045
Abstract: An isotropic stochastic background of nanohertz gravitational waves creates excess residual power in pulsar-timing-array datasets, with characteristic inter-pulsar correlations described by the Hellings-Downs function. These correlations appear as nondiagonal terms in the noise covariance matrix,… read more here.
Keywords: stochastic gravitational; characterization stochastic; accurate characterization; background ... See more keywords