Dark Energy Survey: A 2. 1% measurement of the angular Baryonic Acoustic Oscillation scale at redshift z ₄₅₅=0. 85 from the final dataset

Key Points

The measurement constrains the angular distance to sound horizon scale at D_M(z_eff)/r_d = 19.51 ± 0.41.
The measurement of α is derived using Angular Correlation Function, Angular Power Spectrum, and Projected Correlation Function methods.
Data involves a galaxy sample of nearly 16 million spanning 4,273 square degrees over six tomographic bins from the Dark Energy Survey over six years of observation activities in varying redshifts.

Abstract

We present the angular diameter distance measurement obtained with the Baryonic Acoustic Oscillation feature from galaxy clustering in the completed Dark Energy Survey, consisting of six years (Y6) of observations. We use the Y6 BAO galaxy sample, optimized for BAO science in the redshift range 0.60.75 from any survey and the most precise measurement at any redshift from photometric surveys. The analysis was performed blinded to the BAO position and it is shown to be robust against analysis choices, data removal, redshift calibrations and observational systematics.

Dark Energy Survey: A 2. 1% measurement of the angular Baryonic Acoustic Oscillation scale at redshift z ₄₅₅=0. 85 from the final dataset

Key Points

Abstract

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