Time drift of cosmological redshifts and its variance

Abstract

The contribution of cosmological perturbations to the time drift of the cosmological redshift is derived. It is shown that the dominant correction arises from the local acceleration of both the emitter and the observer. The amplitude of this effect is estimated to be of the order of 1% of the drift signal at z=2-4, but can easily be lowered down to 0.1% by using many absorption lines and quasars.

6 pages, 2 figures. Fig. 1 modified. Accepted for publication in PRD

References in corpus (4)

• The acceleration of the universe and the physics behind it
• Exploring the Dark Energy Redshift Desert with the Sandage-Loeb Test
• Exploring holographic dark energy model with Sandage-Loeb test
• Testing the LCDM model (and more) with the time evolution of the redshift

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• Forecasts of redshift drift constraints on cosmological parameters
• Constraining minimally extended varying speed of light by cosmological chronometers
• Causal structures in cosmology
• Direct detection of the cosmic expansion: the redshift drift and the flux drift
• The Instantaneous Redshift Difference of Gravitationally Lensed Images: Theory and Observational Prospects
• Redshift drift in a universe with structure II: Light rays propagated through a Newtonian N-body simulation
• BiGONLight: light propagation with bi-local operators in Numerical Relativity
• Redshift Drift fluctuations from N-body simulations