2021/02/12 by V. Salzano, C. Pigozzo, M. Benetti +21 · 1 citation
Physics and Astronomy · #astro-ph.CO
paper · pdf · doi:10.1088/1475-7516/2021/09/033
published as JCAP 2109 (2021) 033 · 34 pages, 9 figures, 14 tables
arxiv created 2021/02/12 · arxiv updated 2021/09/28
The next generation of galaxy surveys will allow us to test some fundamental aspects of the standard cosmological model, including the assumption of a minimal coupling between the components of the dark sector. In this paper, we present the Javalambre Physics of the Accelerated Universe Astrophysical Survey (J-PAS) forecasts on a class of unified models where cold dark matter interacts with a vacuum energy, considering future observations of baryon acoustic oscillations, redshift-space distortions, and the matter power spectrum. After providing a general framework to study the background and linear perturbations, we focus on a concrete interacting model without momentum exchange by taking into account the contribution of baryons. We compare the J-PAS results with those expected for DESI and Euclid surveys and show that J-PAS is competitive to them, especially at low redshifts. Indeed, the predicted errors for the interaction parameter, which measures the departure from a ΛCDM model, can be comparable to the actual errors derived from the current data of cosmic microwave background temperature anisotropies.