Measuring the speed of light with cosmological observations: current constraints and forecasts

Abstract

We measure the speed of light with current observations, such as Type Ia Supernova, galaxy ages, radial BAO mode, as well as simulations of forthcoming redshift surveys and gravitational waves as standard sirens. By means of a Gaussian Process reconstruction, we find that the precision of such measurements can be improved from roughly 6\% and to about $2-2.5\%$ when the gravitational wave simulations are considered, and to $1.5-2\%$ when redshift survey are included in the analysis as well. This result demonstrates that we will be able to perform a cosmological measurement of a fundamental physical constant with significantly improved precision, which will help us underpinning if its value is truly consistent with local measurements, as predicted by the standard model of Cosmology.

12 pages, 1 appendix, 9 figures. Accepted for publication in JCAP

References in corpus (25)

• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• The Pantheon+ Analysis: Cosmological Constraints
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• Science with the Einstein Telescope: a comparison of different designs
• Determination of Dark Energy by the Einstein Telescope: Comparing with CMB, BAO and SNIa Observations
• The status of varying constants: a review of the physics, searches and implications
• J-PAS: The Javalambre-Physics of the Accelerated Universe Astrophysical Survey
• The resilience of the Etherington-Hubble relation
• Note on Varying Speed of Light Cosmologies
• Model-Independent Constraints on Lorentz Invariance Violation via the Cosmographic Approach
• Model-independent constraints on Lorentz invariance violation: implication from updated Gamma-ray burst observations
• Measuring the speed of light with Baryon Acoustic Oscillations
• Cosmology with relativistically varying physical constants
• Observational constraint on the varying speed of light theory
• Comments on "Note on varying speed of light theories"
• A search for the variation of speed of light using galaxy cluster gas mass fraction measurements
• Variation of the speed of light and a minimum speed in the scenario of an inflationary universe with accelerated expansion
• Measuring the Hubble Constant with cosmic chronometers: a machine learning approach
• Constraining minimally extended varying speed of light by cosmological chronometers
• Constraint on the minimally extended varying speed of light using time dilations in type Ia supernovae
• Measuring the speed of light with updated Hubble diagram of high-redshift standard candles
• SNe Data Analysis in Variable Speed of Light Cosmologies without Cosmological Constant
• Shadows of black holes at cosmological distances in the co-varying physical couplings framework
• Examining the validity of the minimal varying speed of light model through cosmological observations: relaxing the null curvature constraint

Cited by in corpus (6)

• Time dilation observed in Type Ia supernova light curves and its cosmological consequences
• An investigation of a varying G through Strong Lensing and SNe Ia observations
• Stringent constraint on the CCC+TL cosmology with $H(z)$ Measurements
• Dilaton-induced variations in Planck constant and speed of light: An alternative to Dark Energy
• New analysis of SNeIa Pantheon Catalog: Variable speed of light as an alternative to dark energy
• A mechanism to generate varying speed of light via Higgs-dilaton coupling: Theory and cosmological applications