by Stephen Eikenberry, Anthony Gonzalez, Jeremy Darling, Zachary Slepian, Guido Mueller, John Conklin, Paul Fulda, Sarik Jeram, Chenxing Dong, and Amanda Townsend
Published onMay 31, 2019
A Direct Measure of Cosmic Acceleration
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Abstract
Two decades after the discovery of accelerating cosmic expansion, there remains no direct detection of a change in the expansion velocity versus time. Redshift drift directly determines H(z), thus it is arguably the cleanest measurement of expansion history. Dedicated experiments can detect redshift drift with a five-year observational baseline.
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