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At sufficiently small cosmological redshift, the recession-rate proxy inferred from redshift is approximately proportional to proper distance, .
At large redshift, distance and recession velocity depend on the chosen relativistic distance measure and cosmological model; the linear low-redshift expression must not be extrapolated naively.
wp-physics-hubble-lawnasa-hubble-constantnasa-hubble-cosmological-redshiftEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Smooth FLRW expansion gives a locally linear distance–redshift relation; is the present value of , while peculiar velocities and higher-order cosmological terms matter beyond the local regime.
The target represents a state, property, observable, or state-dependent description associated with the source system or theory.
wp-physics-hubble-lawnasa-hubble-constantnasa-hubble-cosmological-redshiftEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
In the low-redshift regime, measured cosmological redshift supplies the recession-rate proxy in the approximately linear relation ; the exact relativistic relation is model dependent.
A theory, law, or interaction describes the behavior of the target within a stated regime. The edge detail must state important limits or qualifications.
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