http://arxiv.org/abs/1807.00016
We explore how cosmological parameters can be constrained with gravitational wave standard sirens and weak gravitational lensing. In addition to auto-correlations of these observables, we take into account cross-correlations of the projected number density of gravitational wave sources and weak lensing convergence field. For weak lensing, we use tomography technique to efficiently obtain information of large-scale structure at wide ranges of redshifts. Combining all these correlations, we present a forecast of constraints on four cosmological parameters, i.e., Hubble parameter, matter density, the equation of state parameter of dark energy, and the amplitude of matter fluctuation. In the case of the upcoming surveys such as Euclid for weak lensing and Einstein Telescope for gravitational waves, we can place a tight constraint on these parameters.
K. Osato
Tue, 3 Jul 18
47/95
Comments: 11 pages, 5 figures, submitted to PRD
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