Compressed baryon acoustic oscillation analysis is robust to modified-gravity models

Understand

We study the robustness of the baryon acoustic oscillation (BAO) analysis to the underlying cosmological model.

• We focus on testing the standard BAO analysis that relies on the use of a template.
• These templates are constructed assuming a fixed fiducial cosmological model and used to extract the location of the acoustic peaks.
• Such "compressed analysis" had been shown to be unbiased when applied to the $\Lambda$CDM model and some of its extensions.