Tantalizing New Physics from the Cosmic Purview
Abstrak
The emergence of a highly improbable coincidence incosmological observations speaks to a remarkably simple cosmic expansion.Compelling evidence now suggests that the Universe's gravitational horizon,coincident with the better known Hubble sphere, has a radius improbably equal tothe distance light could have travelled since the Big Bang. The confirmation ofthis unexpected result would undoubtedly herald the influence of new physics,yet appears to be unavoidable after a recent demonstration that theFriedmann-Lema\^itre-Robertson-Walker metric is valid only for the so-calledzero active mass equation of state. As it turns out, a cosmic fluid with thisproperty automatically produces the aforementioned equality, leaving littleroom for a cosmological constant. The alternative---a dynamical dark energy---wouldsuggest an extension to the standard model of particle physics, and a seriousre-evaluation of the Universe's early history.
Penulis (1)
Fulvio Melia
Akses Cepat
- Tahun Terbit
- 2022
- Bahasa
- en
- Sumber Database
- CrossRef
- DOI
- 10.31219/osf.io/tsbrz
- Akses
- Open Access ✓