Screening away the tension
arXiv:2007.11029 · doi:10.1142/S0218271820430105
Abstract
This Essay explores consequences of a dark non-linear electromagnetic sector in a Universe with a net dark charge for matter. The cosmological dynamics can be described by a Lemaître model and understood thanks to a screening mechanism driven by the electromagnetic non-linearities that suppress the dark force on small scales. Only at low redshift, when the screening scale enters the Hubble horizon, do cosmological structures commence to feel the dark repulsion. This repulsive force enhances the local value of the Hubble constant, thus providing a promising scenario for solving the Hubble tension. Remarkably, the dark electromagnetic interaction can have a crucial impact on peculiar velocities, i.e. introducing a bias in their reconstruction methods, and having the potential to explain the presence of a dark flow.
arXiv comment8 pages, 2 Figures. Accepted in IJMPD. Honorable mention in the Gravity Research Foundation 2020 Awards for Essays on Gravitation
References in corpus (5)
- Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
- A measurement of large-scale peculiar velocities of clusters of galaxies: results and cosmological implications
- Inhomogeneous cosmological models: exact solutions and their applications
- Probing the Dark Flow signal in WMAP 9 yr and PLANCK cosmic microwave background maps
- Discrete Newtonian Cosmology