Cosmological implications of the full shape of anisotropic clustering measurements in BOSS and eBOSS

• DOI: 10.1093/mnras/stac829
• Publication Date: 2022-03-22T20:11:14Z
• Authors: Agne Semenaite; Ariel G Sánchez; Andrea Pezzotta; Jiamin Hou; Roman Scoccimarro; Alexander Eggemeier; Martin Crocce; Chia-Hsun Chuang; Alexander Smith; Cheng Zhao; Joel R Brownstein; Graziano Rossi; Donald P Schneider
• Keywords: Baryon Acoustic Oscillations; Matter power spectrum; Cold dark matter; Sample variance; Oscillation (cell signaling)

We present the analysis of full shape anisotropic clustering measurement from extended Baryon Oscillation Spectroscopic Survey (eBOSS) quasar sample together with combined galaxy (BOSS), re-analysed using an updated recipe for non-linear matter power spectrum and non-local bias parameters. obtain constraints flat $\Lambda$CDM cosmologies, focusing on cosmological parameters that are independent Hubble parameter $h$. Our recovered value RMS linear perturbation theory variance as measured scale $12\,{\rm Mpc}$ is $\sigma_{12}=0.805\pm 0.049$, while traditional reference $8\,h^{-1}{\rm gives $\sigma_{8}=0.815\pm 0.044$. quantify agreement between our measurements latest CMB data Planck suspiciousness metric, find them to be consistent within $0.64 \pm 0.03\sigma$. Combining $3\times2$pt Dark Energy (DES) Year 1 release slightly degrades this level $1.54 0.08\sigma$, still showing overall consistency Planck. furthermore study effect imposing a - like prior define spectrum, significantly tighter control evolution density fluctuations. In particular, combination low-redshift sets prefers physical dark energy $\omega_{\rm DE}=0.335 0.011$, which 1.7$\sigma$ higher than one preferred by