Challenges to the Lambda CDM Cosmology
Abstract
Observations of the cosmic microwave backgroundradiation are described to remarkable accuracy by the six-parameterLambda CDM cosmology. However, the key ingredients of this model, namely dark matter, dark energy and cosmic inflation are not understood at a fundamental level. It is therefore important to investigate tensions between the CMB and other cosmological probes. I will review aspects of tensions with direct measurements of the Hubble constant H_0, measurements of weak gravitational lensing, and the recent hints of evolving dark energy reported by the Dark Energy Spectroscopic Instrument (DESI) collaboration.
Cite
@article{arxiv.2406.12106,
title = {Challenges to the Lambda CDM Cosmology},
author = {George Efstathiou},
journal= {arXiv preprint arXiv:2406.12106},
year = {2024}
}
Comments
Talk presented at the Royal Society Discussion Meeting 'Challenges to the standard cosmological model', submitted to Phil. Trans Roy. Soc. A. (Typos corrected)