Can the Copernican principle be tested by cosmic neutrino background?

Abstract

The Copernican principle, stating that we do not occupy any special place in our universe, is usually taken for granted in modern cosmology. However recent observational data of supernova indicate that we may live in the under-dense center of our universe, which makes the Copernican principle challenged. It thus becomes urgent and important to test the Copernican principle via cosmological observations. Taking into account that unlike the cosmic photons, the cosmic neutrinos of different energies come from the different places to us along the different worldlines, we here propose cosmic neutrino background as a test of the Copernican principle. It is shown that from the theoretical perspective cosmic neutrino background can allow one to determine whether the Copernican principle is valid or not, but to implement such an observation the larger neutrino detectors are called for.

arXiv commentJHEP style, 10 pages, 4 figures, version to appear in JCAP

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Cited by in corpus (12)

• Dark Energy
• Is the Observable Universe Consistent with the Cosmological Principle?
• Inhomogeneity and the foundations of concordance cosmology
• Establishing homogeneity of the universe in the shadow of dark energy
• Perturbation Theory in Lemaitre-Tolman-Bondi Cosmology
• Redshift Drift in LTB Void Universes
• The Scale of Cosmic Isotropy
• CMB observations in LTB universes: Part I: Matching peak positions in the CMB spectrum
• Testing homogeneity with the fossil record of galaxies
• The effect of pressure gradients on luminosity distance - redshift relations
• Cosmic Neutrino Last Scattering Surface
• Constraining Chaplygin models using diffuse supernova neutrino background