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The possibility of watching the Universe expand in real time and in amodel-independent way, first envisaged by Allan Sandage more than 60 years agoand known as the redshift drift, is within reach of forthcoming astrophysicalfacilities, particularly the Extremely Large Telescope (ELT) and the SquareKilometre Array Observatory (SKAO). The latter, probing lower redshifts,enables us to watch the Universe's acceleration era in real time, while theformer does the same for the matter era. We use Fisher Matrix Analysistechniques, which we show to give comparable results to those of a Markov ChainMonte Carlo approach, to discuss forecasts for SKAO measurements of theredshift drift and their cosmological impact. We consider specific fiducialcosmological models but mainly rely on a more agnostic cosmographic series(which includes the deceleration and jerk parameters), and we also discussprospects for measurements of the drift of the drift. Overall, our analysisshows that SKAO measurements, with a reasonable amount of observing time, canprovide a competitive probe of the low-redshift accelerating Universe.

Watching the Universe's acceleration era with the SKAO