J-PAS: Forecasts on interacting vacuum energy models

V. Salzano, C. Pigozzo, M. Benetti, H. A. Borges, R. Von Marttens, S. Carneiro, J. S. Alcaniz, J. C. Fabris, S. Tsujikawa, N. Benítez, S. Bonoli, A. J. Cenarro, D. Cristóbal-Hornillos, R. A. Dupke, A. Ederoclite, C. López-Sanjuan, A. Marín-Franch, V. Marra, M. Moles, C. Mendes De OliveiraL. Sodré, K. Taylor, J. Varela, H. Vázquez Ramió

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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.

Original languageEnglish
Article number033
JournalJournal of Cosmology and Astroparticle Physics
Issue number9
Publication statusPublished - 2021 Sept


  • cosmological parameters from LSS
  • dark energy theory
  • galaxy surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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