2014/09/30 by Mahmoud Hashim, Daniele Bertacca, Roy Maartens · 1 citation
Physics and Astronomy · #Astrophysics #Biology #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Degeneracy (biology) #Degenerate energy levels #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gaussian #Non-Gaussianity #Physics #Quantum mechanics #Redshift #SIGNAL (programming language) #Scale (ratio) #Spectral density #Statistical physics #astro-ph.CO
paper · pdf · doi:10.1103/physrevd.90.103518
published as Phys. Rev. D 90, 103518 (2014) · Minor changes. Version accepted by Phys Rev D
arxiv created 2014/10/24 · openalex publication_date 2014/11/13 · arxiv updated 2014/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
If dark energy and dark matter interact via exchange of energy and momentum, then this may affect the galaxy power spectrum on large scales. When this happens, it may be degenerate with the signal from primordial non-Gaussianity via a scale-dependent bias. We consider a class of interacting dark energy models and show that the matter overdensity is scale dependent on large scales. We estimate the effective non-Gaussianity arising from the large-scale effects of interaction in the dark sector. The signal of dark sector interaction can be disentangled from a primordial non-Gaussian signal by measuring the power at two redshifts.