BAO cosmography

Understand

Cosmography provides a model-independent way to map the expansion history of the Universe.

• In this paper we simulate a Euclid-like survey and explore cosmographic constraints from future Baryonic Acoustic Oscillations (BAO) observations.
• We derive general expressions for the BAO transverse and radial modes and discuss the optimal order of the cosmographic expansion that provide reliable cosmological constraints.
• Through constraints on the deceleration and jerk parameters, we show that future BAO data have the potential to provide a model-independent check of the cosmic acceleration as well as a discrimination between the standard $\Lambda$CDM model and alternative mechanisms of cosmic acceleration.