The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: Anisotropic Baryon Acoustic Oscillations measurements in Fourier-space with optimal redshift weights

TL;DR

This paper measures anisotropic and isotropic BAO from eBOSS DR14 quasars using optimal redshift weights, improving constraints and reconstructing BAO distance evolution between redshifts 0.8 and 2.2.

Contribution

It introduces an optimal redshift weighting method to enhance BAO measurements from quasar data, enabling detailed evolution analysis.

Findings

Improved BAO constraint by 17% with redshift weights

Reconstructed BAO distance evolution from redshift 0.8 to 2.2

Part of a broader analysis of eBOSS DR14 quasar sample

Abstract

We present a measurement of the anisotropic and isotropic Baryon Acoustic Oscillations (BAO) from the extended Baryon Oscillation Spectroscopic Survey Data Release 14 quasar sample with optimal redshift weights. Applying the redshift weights improves the constraint on the BAO dilation parameter $\alpha(z_{\rm eff})$ by 17\%. We reconstruct the evolution history of the BAO distance indicators in the redshift range of $0.8<z<2.2$. This paper is part of a set that analyses the eBOSS DR14 quasar sample.