TY - JOUR
T1 - The second-order luminosity-redshift relation in a generic inhomogeneous cosmology
AU - Ben-Dayan, Ido
AU - Marozzi, Giovanni
AU - Nugier, Fabien
AU - Veneziano, Gabriele
PY - 2012/11
Y1 - 2012/11
N2 - After recalling a general non-perturbative expression for the luminosity-redshift relation holding in a recently proposed ''geodesic light-cone" gauge, we show how it can be transformed to phenomenologically more convenient gauges in which cosmological perturbation theory is better understood. We present, in particular, the complete result on the luminosity-redshift relation in the Poisson gauge up to second order for a fairly generic perturbed cosmology, assuming that appreciable vector and tensor perturbations are only generated at second order. This relation provides a basic ingredient for the computation of the effects of stochastic inhomogeneities on precision dark-energy cosmology whose results we have anticipated in a recent letter. More generally, it can be used in connection with any physical information carried by light-like signals traveling along our past light-cone.
AB - After recalling a general non-perturbative expression for the luminosity-redshift relation holding in a recently proposed ''geodesic light-cone" gauge, we show how it can be transformed to phenomenologically more convenient gauges in which cosmological perturbation theory is better understood. We present, in particular, the complete result on the luminosity-redshift relation in the Poisson gauge up to second order for a fairly generic perturbed cosmology, assuming that appreciable vector and tensor perturbations are only generated at second order. This relation provides a basic ingredient for the computation of the effects of stochastic inhomogeneities on precision dark-energy cosmology whose results we have anticipated in a recent letter. More generally, it can be used in connection with any physical information carried by light-like signals traveling along our past light-cone.
KW - cosmological perturbation theory
KW - dark energy theory
KW - gravity
UR - http://www.scopus.com/inward/record.url?scp=84870276971&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2012/11/045
DO - 10.1088/1475-7516/2012/11/045
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AN - SCOPUS:84870276971
SN - 1475-7516
VL - 2012
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
IS - 11
M1 - 045
ER -