Cosmological constraints on early dark energy from the full shape analysis of eBOSS DR16
arxiv(2023)
摘要
We evaluate the effectiveness of Early Dark Energy (EDE) in addressing the
Hubble tension using data from the completed eBOSS survey, focusing on luminous
red galaxies (LRGs), quasars (QSOs), and emission line galaxies (ELGs). We
perform cosmological parameter measurements based on full shape analysis of the
power spectrum of all three tracers. We conduct this full shape analysis with
the effective field theory of large-scale structure (EFTofLSS). EDE is known to
strongly suffer from volume projection effects, which makes the interpretation
of cosmological constraints challenging. To quantify the volume projection
effects within an EDE full shape analysis, we explore the impact of different
prior choices on the nuisance parameters of EFTofLSS through an extensive mock
study. We compare classical Gaussian priors to the non-informative Jeffreys
prior, known to mitigate volume projection effects in ΛCDM. Our full
shape analysis combines eBOSS and BOSS data with Planck, external Baryon
Acoustic Oscillation (BAO), PantheonPlus, and SH0ES supernova data. EDE
demonstrates to reduce the tension from 5.2σ to 3σ compared to
ΛCDM. The derived values at a 68% credible interval with Gaussian and
Jeffreys priors are H_0=71.73_-0.86^+0.82 km/s/Mpc with f_EDE =
0.1179_-0.022^+0.025 and H_0=72.03_-0.87^+0.82 km/s/Mpc with
f_EDE = 0.1399_-0.022^+0.023, respectively. Although the Hubble
tension is mitigated compared to ΛCDM, the inclusion of eBOSS data
amplifies the tension within EDE from 2σ to 3σ, in contrast to
the full shape analysis of BOSS data with Planck, external BAO, PantheonPlus,
and SH0ES. This highlights the significance of incorporating additional
large-scale structure data in discussions concerning models aiming to resolve
the Hubble tension.
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