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.

JHEP style, 10 pages, 4 figures, version to appear in JCAP

References in corpus (6)

• A general test of the Copernican Principle
• Lemaitre-Tolman-Bondi model and accelerating expansion
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• Inhomogeneous spacetimes as a dark energy model
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Cited by in corpus (2)

• Is the Observable Universe Consistent with the Cosmological Principle?
• Redshift Drift in LTB Void Universes