A physical interpretation of Hubble's law and the cosmological redshift from the perspective of a static observer

Abstract

We derive explicit and exact expressions for the physical velocity of a free particle comoving with the Hubble flow as measured by a static observer, and for the frequency shift of light emitted by a comoving source and received, again, by a static observer. The expressions make it clear that an interpretation of the redshift as a kind of Doppler effect only makes sense when the distance between the observer and the source vanishes exactly.

5 pages, added references; accepted for publication in General Relativity and Gravitation

References in corpus (3)

• A direct consequence of the expansion of space?
• Expanding Space: the Root of all Evil?
• Interpretation of the Cosmological Metric