Can the Copernican principle be tested by cosmic neutrino background?

Details Can the Copernican principle be tested by cosmic neutrino background? Can the Copernican principle be tested by cosmic neutrino background?

2008-09-15

arxiv.org/abs/0809.2597v2

JCAP0812:002,2008

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1088/1475-7516/2008/12/002

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.

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