2018/10/31 by José Luis Bernal, Alvise Raccanelli, Ely D. Kovetz +5
Physics and Astronomy · #Active galactic nucleus #Astronomy #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Physics #Planck #Radio Astronomy Observations and Technology #Redshift #Redshift survey #Redshift-space distortions #Universe #astro-ph.CO
paper · pdf · doi:10.1088/1475-7516/2019/02/030
published as JCAP02(2019)030 · 15 pages (29 with references and appendices), 6 figures and 10 tables. Matches the published version. Minimal changes from previous version
openalex created_date 2018/10/26 · openalex publication_date 2019/02/14 · arxiv created 2019/02/18 · arxiv updated 2019/02/19 · openalex updated_date 2026/08/06
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.