Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-11-17
Astrophys.J.644:80-85,2006; AIP Conf.Proc.873:120-124,2006
Astronomy and Astrophysics
Astrophysics
6 pages, 6 figures, refferences added, accepted for publication in ApJ
Scientific paper
10.1086/503323
When a gravitational wave (GW) from a distant source propagates through the universe, its amplitude and phase change due to gravitational lensing by the inhomogeneous mass distribution. We derive the amplitude and phase fluctuations, and calculate these variances in the limit of a weak gravitational field of density perturbation. If the scale of the perturbation is smaller than the Fresnel scale $\sim 100 {pc} (f/{mHz})^{-1/2}$ ($f$ is the GW frequency), the GW is not magnified due to the diffraction effect. The rms amplitude fluctuation is $1-10 %$ for $f > 10^{-10}$ Hz, but it is reduced less than 5% for a very low frequency of $f < 10^{-12}$ Hz. The rms phase fluctuation in the chirp signal is $\sim 10^{-3}$ radian at LISA frequency band ($10^{-5} - 10^{-1}$ Hz). Measurements of these fluctuations will provide information about the matter power spectrum on the Fresnel scale $\sim 100$ pc.
No associations
LandOfFree
Amplitude and Phase Fluctuations for Gravitational Waves Propagating through Inhomogeneous Mass Distribution in the Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Amplitude and Phase Fluctuations for Gravitational Waves Propagating through Inhomogeneous Mass Distribution in the Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplitude and Phase Fluctuations for Gravitational Waves Propagating through Inhomogeneous Mass Distribution in the Universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-587707