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- W2487776419 abstract "The redshift drift of objects moving in the Hubble flow has been proposed as a powerful model-independent probe of the underlying cosmology. A measurement of the first- and second-order redshift derivatives appears to be well within the reach of upcoming surveys using as the Extremely Large Telescope high resolution spectrometer (ELT-HIRES) and the Square Kilometer Phase 2 Array (SKA). Here we show that an unambiguous prediction of the Rh = ct cosmology is zero drift at all redshifts, contrasting sharply with all other models in which the expansion rate is variable. For example, multiyear monitoring of sources at redshift z = 5 with the ELT-HIRES is expected to show a velocity shift Δv = −15 cm s−1 yr−1 due to the redshift drift in Planck ΛCDM, while Δv = 0 cm s−1 yr−1 in Rh = ct. With an anticipated ELT-HIRES measurement error of ±5 cm s−1 yr−1 after 5 yr, these upcoming redshift drift measurements might therefore be able to differentiate between Rh = ct and Planck ΛCDM at ∼3σ, assuming that any possible source evolution is well understood. Such a result would provide the strongest evidence yet in favour of the Rh = ct cosmology. With a 20-yr baseline, these observations could favour one of these models over the other at better than 5σ." @default.
- W2487776419 created "2016-08-23" @default.
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- W2487776419 date "2016-08-03" @default.
- W2487776419 modified "2023-10-02" @default.
- W2487776419 title "Definitive test of the<i>R</i><sub>h</sub> = <i>ct</i>universe using redshift drift" @default.
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- W2487776419 doi "https://doi.org/10.1093/mnrasl/slw157" @default.
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