Cosmological Constant from Boundary Condition and Its Implications beyond the Standard Model
arXiv:2302.13820 · doi:10.3390/universe9020103
Abstract
Standard cosmology has long been plagued by a number of persistent problems. The origin of the apparent acceleration of the cosmic expansion remains enigmatic. The cosmological constant has been reintroduced as a free parameter with a value in energy density units that ``happens'' to be of the same order as the present matter energy density. There is an internal inconsistency with regards to the Hubble constant, the so-called tension. The derived value of depends on the type of data that is used. With supernovae as standard candles one gets a that is 4-5 larger than the value that one gets from CMB (Cosmic Microwave Background) data for the early universe. Here we show that these problems are related and can be solved if the cosmological constant represents a covariant integration constant that arises from a spatial boundary condition, instead of being a new type of hypothetical physical field, ``dark energy'', as assumed by standard cosmology. The boundary condition only applies to the bounded 3D subspace that represents the observable universe, the hypersurface of the past light cone.
References in corpus (27)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- Dark Energy and the Accelerating Universe
- Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
- Cosmology and Fundamental Physics with the Euclid Satellite
- Everything You Always Wanted To Know About The Cosmological Constant Problem (But Were Afraid To Ask)
- KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics
- Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
- Star Clusters Across Cosmic Time
- New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant
- Dark Energy vs. Modified Gravity
- First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
- Why reducing the cosmic sound horizon alone can not fully resolve the Hubble tension
- HD 140283: A Star in the Solar Neighborhood that Formed Shortly After the Big Bang
- Experiment to detect dark energy forces using atom interferometry
- Measuring the vertical age structure of the Galactic disc using asteroseismology and SAGA
- Globular Cluster Formation and Evolution in the Context of Cosmological Galaxy Assembly: Open Questions
- On the cosmological constant problem
- What do we really know about Dark Energy?
- Inferring the Age of the Universe with Globular Clusters
- Cosmic dissonance: new physics or systematics behind a short sound horizon?
- The First Stars in The Universe
- The relative and absolute ages of old globular clusters in the LCDM framework
- Cosmic Information, the Cosmological Constant and the Amplitude of primordial perturbations
- Asteroseismic age determination for dwarfs and giants
- Cosmological constant caused by observer-induced boundary condition
- Dark energy as an emergent phenomenon