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Phys Rev Lett. 2013 Apr 12;110(15):151103. Epub 2013 Apr 8.

Beyond concordance cosmology with magnification of gravitational-wave standard sirens.

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CENTRA, Instituto Superior Técnico, Universidade Técnica de Lisboa, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal.
Yukawa Institute for Theoretical Physics, University of Kyoto, Kyoto 606-8502, Japan.


We show how future gravitational-wave detectors would be able to discriminate between the concordance Λ cold dark matter cosmological model and up-to-date competing alternatives, e.g., dynamical dark energy (DE) models or modified gravity (MG) theories. Our method consists of using the weak-lensing magnification effect that affects a standard-siren signal because of its traveling through the Universe's large scale structure. As a demonstration, we present constraints on DE and MG from proposed gravitational-wave detectors, namely Einstein Telescope and DECI-Hertz Interferometer Gravitational-Wave Observatory and Big-Bang Observer.

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