Documentdetail
ID kaart
oai:arXiv.org:2408.11774
Onderwerp
Astrophysics - Cosmology and Nonga... General Relativity and Quantum Cos...Auteur
Hu, Wayne Liang, Qiuyue Lin, Meng-Xiang Trodden, MarkCategorie
wetenschappen: astrofysica
Jaar
2024
vermelding datum
05-02-2025
Trefwoorden
gravitational wavesBeschrijving
We consider the effects of relaxing the assumption that gravitational waves composing the stochastic gravitational wave background (SGWB) are uncorrelated between frequencies in analyses of the data from Pulsar Timing Arrays (PTAs).
While individual monochromatic plane waves are often a good approximation, a background composed of unresolved astrophysical sources cannot be exactly uncorrelated since an infinite plane wave propagates no temporal signal.
We consider how relaxing this assumption allows us to extract potential information about modified dispersion relations and other fundamental physics questions, as both the group and phase velocity of waves become relevant.
After developing the formalism we carry out simple Gaussian wavepacket examples and then consider more realistic waveforms, such as that from binary inspirals.
When the frequency evolves only slowly across the PTA temporal baseline, the monochromatic assumption at an effective mean frequency remains a good approximation and we provide scaling relations that characterize its accuracy.
;Comment: Match the published version: typo correction, more references.
32 pages, 6 figures
Hu, Wayne,Liang, Qiuyue,Lin, Meng-Xiang,Trodden, Mark, 2024, Testing Gravity with Realistic Gravitational Waveforms in Pulsar Timing Arrays
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