Abstract

An axion-like field comprising $\sim 10\%$ of the energy density of the universe near matter-radiation equality is a candidate to resolve the Hubble tension; this is the "early dark energy" (EDE) model. However, as shown in Hill et al. (2020), the model fails to simultaneously resolve the Hubble tension and maintain a good fit to both cosmic microwave background (CMB) and large-scale structure (LSS) data. Here, we use redshift-space galaxy clustering data to sharpen constraints on the EDE model. We perform the first EDE analysis using the full-shape power spectrum likelihood from the Baryon Oscillation Spectroscopic Survey (BOSS), based on the effective field theory (EFT) of LSS. The inclusion of this likelihood in the EDE analysis yields a $25\%$ tighter error bar on $H_0$ compared to primary CMB data alone, yielding $H_0 = 68.54^{+0.52}_{-0.95}$ km/s/Mpc ($68\%$ CL). In addition, we constrain the maximum fractional energy density contribution of the EDE to $f_{\rm EDE} < 0.072$ ($95\%$ CL). We explicitly demonstrate that the EFT BOSS likelihood yields much stronger constraints on EDE than the standard BOSS likelihood. Including further information from photometric LSS surveys,the constraints narrow by an additional $20\%$, yielding $H_0 = 68.73^{+0.42}_{-0.69}$ km/s/Mpc ($68\%$ CL) and $f_{\rm EDE}<0.053$ ($95\%$ CL). These bounds are obtained without including local-universe $H_0$ data, which is in strong tension with the CMB and LSS, even in the EDE model. We also refute claims that MCMC analyses of EDE that omit SH0ES from the combined dataset yield misleading posteriors. Finally, we demonstrate that upcoming Euclid/DESI-like spectroscopic galaxy surveys can greatly improve the EDE constraints. We conclude that current data preclude the EDE model as a resolution of the Hubble tension, and that future LSS surveys can close the remaining parameter space of this model.

Highlights

  • IV, we present the constraints on early dark energy” (EDE) from current data, namely Planck 2018, Baryon Oscillation Spectroscopic Survey (BOSS) full-shape þ baryon acoustic oscillation (BAO), and an S8 prior corresponding to the measurements of Dark Energy Survey (DES), KiDS þ VIKING-450 (KV-450), and Hyper Suprime-Cam (HSC)

  • Combined with accompanying shifts in the other standard ΛCDM parameters—e.g., the physical dark matter density—this can provide a good fit to the Planck 2018 cosmic microwave background (CMB) temperature and polarization data for H0 values in near agreement with SH0ES

  • This comes at a time when large-scale structure (LSS) data, in combination with a big bang nucleosynthesis (BBN) prior on the baryon density, provides a CMB-independent early-Universe measurement of H0 [19,21,23,57] that is consistent with the value inferred from Planck 2018 CMB data

Read more

Summary

INTRODUCTION

The persistent and growing discrepancy in the value of the Hubble constant, H0, inferred from different observations [1], if taken at face value, presents a serious challenge. The joint FS þ BAO data from BOSS yields H0 1⁄4 68.6 Æ 1.1 km=s=Mpc [23], in excellent agreement with the CMB result In all these measurements, standard early-Universe physics is assumed, such that the sound horizon rs is a fixed function of the ΛCDM cosmological parameters. [40] using a new BOSS likelihood, which (a) is tailored for the EDE model (i.e., no implicit ΛCDM-based assumptions are made), (b) has all relevant cosmological parameters varied, and (c) uses the full shape of the redshift-space galaxy power spectrum, going beyond the simplified fσ þ BAO parametrization This analysis has been made possible by virtue of recent progress in LSS theory.

THE EARLY DARK ENERGY PROPOSAL
EDE MEETS LSS
CONSTRAINTS ON THE EDE SCENARIO
Datasets
EDE Meets BOSS
Full combination of CMB and LSS data
FORECAST EDE CONSTRAINTS WITH FUTURE LSS DATA
Findings
DISCUSSION AND CONCLUSIONS
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call