ΛCDM Tensions: Localising Missing Physics through Consistency Checks

被引：16

作者：

Akarsu, Ozgur ^{[1
]}

Colgain, Eoin O. ^{[2
]}

Sen, Anjan A. ^{[3
]}

Sheikh-Jabbari, M. M. ^{[4
]}

机构：

[1] Istanbul Tech Univ, Dept Phys, TR-34469 Istanbul, Turkiye

[2] Atlantic Technol Univ, Ash Lane, Sligo F91 YW50, Ireland

[3] Jamia Millia Islamia, Ctr Theoret Phys, New Delhi 110025, India

[4] Inst Res Fundamental Sci IPM, Sch Phys, POB 19395-5531, Tehran, Iran

来源：

UNIVERSE | 2024年 / 10卷 / 08期

基金：

美国国家科学基金会;

关键词：

LambdaCDM tensions; cosmological parameters; UV FLUX MEASUREMENTS; QUASAR X-RAY; GENERAL-RELATIVITY; PECULIAR VELOCITIES; DARK ENERGY; BULK FLOW; COSMOLOGICAL CONSTANT; COSMIC CHRONOMETERS; HUBBLE TENSION; GROWTH-RATE;

D O I：

10.3390/universe10080305

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Lambda CDM tensions are by definition model-dependent; one sees anomalies through the prism of Lambda CDM. Thus, progress towards tension resolution necessitates checking the consistency of the Lambda CDM model to localise missing physics either in redshift or scale. Since the universe is dynamical and redshift is a proxy for time, it is imperative to first perform consistency checks involving redshift, then consistency checks involving scale as the next steps to settle the "systematics versus new physics" debate and foster informed model building. We present a review of the hierarchy of assumptions underlying the Lambda CDM cosmological model and comment on whether relaxing them can address the tensions. We focus on the lowest lying fruit of identifying missing physics through the identification of redshift-dependent Lambda CDM model fitting parameters. We highlight the recent progress made on S8:=sigma 8 Omega m/0.3 tension and elucidate how similar progress can be made on H0 tension. Our discussions indicate that H0 tension, equivalently a redshift-dependent H0, and a redshift-dependent S8 imply a problem with the background Lambda CDM cosmology.

引用

页数：24

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