Time drift of cosmological redshifts and its variance
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🌌 astro-ph
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cosmologicaldrifttimeabsorptionaccelerationamplitudearisescontribution
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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.
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Cited by 1 Pith paper
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Direct detection of the cosmic expansion: the redshift drift and the flux drift
Redshift drift and flux drift signals could enable SKA1-mid to detect cosmic expansion and acceleration by the mid-2030s if flux stability reaches 10^{-6}, earlier than ELT or full SKA.
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