Theoretical priors and the dark energy equation of state

被引：6

作者：

Ben-Dayan, Ido ^{[1
]}

Kumar, Utkarsh ^{[1
]}

机构：

[1] Ariel Univ, Phys Dept, IL-40700 Ariel, Israel

来源：

EUROPEAN PHYSICAL JOURNAL C | 2024年 / 84卷 / 02期

关键词：

BARYON ACOUSTIC-OSCILLATIONS; SPECTROSCOPIC SURVEY MEASUREMENT; ANISOTROPIC POWER SPECTRUM; RED GALAXY SAMPLE; COSMOLOGICAL CONSTANT; HUBBLE CONSTANT; GROWTH-RATE; REDSHIFTS; 0.6; QUINTESSENCE; CONSTRAINTS;

D O I：

10.1140/epjc/s10052-024-12488-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We revisit the theoretical priors used for inferring Dark Energy (DE) parameters. Any DE model must have some form of a tracker mechanism such that it behaved as matter or radiation in the past. Otherwise, the model is fine-tuned. We construct a model-independent parametrization that takes this prior into account and allows for a relatively sudden transition between radiation/matter to DE behavior. We match the parametrization with current data, and deduce that the adiabatic and effective sound speeds of DE play an important role in inferring the cosmological parameters. We find that there is a preferred transition redshift of 1+z similar or equal to 29-30\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$1+z\simeq 29{-}30$$\end{document}, and some reduction in the Hubble and Large Scale Structure tensions.

引用

页数：25

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