What is it about?
This paper proves that the interpretation of cosmological redshift is coordinate dependent. It is actually a product of the more familiar gravitational and kinematic redshifts understood in other applications of general relativity. As such, it is not a new (third) form of redshift based on the notion of a `stretching' space.
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Why is it important?
This paper resolves a long-standing debate about whether space is stretching with galaxies fixed within it, or whether space is static with galaxies moving through it.
Perspectives
The resolution of the origin of cosmological redshift removes several past inconsistencies with the interpretation of cosmic expansion, including (i) whether space is truly stretching, and (ii) whether superluminal velocities are possible due to light `being carried' within the stretching space.
Professor Fulvio Melia
University of Arizona
Read the Original
This page is a summary of: Cosmological redshift in Friedmann-Robertson-Walker metrics with constant space-time curvature, Monthly Notices of the Royal Astronomical Society, March 2012, Oxford University Press (OUP),
DOI: 10.1111/j.1365-2966.2012.20714.x.
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