Probing ΛcDM cosmology with the Evolutionary Map of the Universe survey

José Luis Bernal, Alvise Raccanelli, Ely D. Kovetz, David Parkinson, Ray P. Norris, George Danforth, Courtney Schmitt

Research output: Contribution to journalReview articlepeer-review

10 Scopus citations

Abstract

The Evolutionary Map of the Universe (EMU) is an all-sky survey in radio-continuum which uses the Australian SKA Pathfinder (ASKAP). Using galaxy angular power spectrum and the integrated Sachs-Wolfe effect, we study the potential of EMU to constrain models beyond ΛCDM (i.e., local primordial non-Gaussianity, dynamical dark energy, spatial curvature and deviations from general relativity), for different design sensitivities. We also include a multi-tracer analysis, distinguishing between star-forming galaxies and galaxies with an active galactic nucleus, to further improve EMU's potential. We find that EMU could measure the dark energy equation of state parameters around 35% more precisely than existing constraints, and that the constraints on f NL and modified gravity parameters will improve up to a factor ∼2 with respect to Planck and redshift space distortions measurements. With this work we demonstrate the promising potential of EMU to contribute to our understanding of the Universe.

Original languageEnglish
Article number030
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Issue number2
DOIs
StatePublished - 14 Feb 2019
Externally publishedYes

Keywords

  • Cosmological parameters from LSS
  • Power spectrum
  • Redshift surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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