The growth of structure in interacting dark energy models

By Gabriela Caldera-Cabral, R. Maartens, B. Schaefer. 2009

138 citations recorded by the source corpus.

If dark energy interacts with dark matter, there is a change in the background evolution of the universe, since the dark matter density no longer evolves as a−3. In addition, the non-gravitational interaction affects the growth of structure. In principle, these changes allow us to detect and constrain an interaction in the dark sector. Here we investigate the growth factor and the weak lensing signal for a new class of interacting dark energy models. In these models, the interaction generalises the simple cases where one dark fluid decays into the other. In order to calculate the effect on structure formation, we perform a careful analysis of the perturbed interaction and its effect on peculiar velocities. Assuming a normalization to today's values of dark matter density and overdensity, the signal of the interaction is an enhancement (suppression) of both the growth factor and the lensing power, when the energy transfer in the background is from dark matter to dark energy (dark energy to dark matter).

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e76c355ab3a0e9941ab11714c93a1c3f3c416f54

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Citations in the corpus

Observational constraints on an interacting dark energy model (2009, unknown): “…(2008); La Vacca & Colombo (2008); He et al. (2009); Bean et al. (2008); Corasaniti (2008); Chongchitnan (2009); Jackson et al. (2009); Gavela et al. (2009); La Vacca et al. (2009); He et al. (2009); Caldera-Cabral et al. (2009); He et al. (2009); Koyama et al. (2009); Kristiansen et al. (2009).”
Cosmology and Fundamental Physics with the Euclid Satellite (2012, methodology): “Alternatively, the coupling can be introduced by choosing directly a covariant stressenergy tensor, treating dark energy as a fluid in the absence of a starting action [818, 1189, 260, 1048, 1188, 811, 512, 259, 513].”
Nonminimal dark sector physics and cosmological tensions (2019, unknown): “[147–194] and Ref.”
Interacting dark energy in the early 2020s: A promising solution to the H0 and cosmic shear tensions (2019, background): “[130–239], for a recent comprehensive review see [200]).”