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| Main Author: | |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.10559 |
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Table of Contents:
- The early dark energy (EDE) model is one of the promising solutions to the Hubble tension. One of the successes of the EDE model is that it can provide a similar fit to the $Λ$CDM model for the CMB power spectrum. In this work, I analyze the phenomenology of the EDE and $Λ$CDM parameters on the CMB temperature power spectrum and notice that this cannot hold on all scales. Thus, if the real cosmology is as described by the EDE model, the $Λ$CDM parameters will be scale-dependent when fitting the CMB power spectrum with the $Λ$CDM model, which can be hints for the EDE model. I examine CMB-S4-like observations through mock data analysis and find that parameter shifts are notable. As observations include smaller scales, I find lower $H_0$, $n_s$, $ω_b$ and higher $ω_m$, $A_s e^{-2τ}$, which will also constitute new tensions with other observations. They can serve as a possible signal for the EDE model.