REVIEW 2 cited by
Lemaitre-Tolman-Bondi model and accelerating expansion
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
I discuss the spherically symmetric but inhomogeneous Lemaitre-Tolman- Bondi (LTB) metric, which provides an exact toy model for an inhomogeneous universe. Since we observe light rays from the past light cone, not the expansion of the universe, spatial variation in matter density and Hubble rate can have the same effect on redshift as acceleration in a perfectly homogeneous universe. As a consequence, a simple spatial variation in the Hubble rate can account for the distant supernova data in a dust universe without any dark energy. I also review various attempts towards a semirealistic description of the universe based on the LTB model.
Forward citations
Cited by 2 Pith papers
-
Galactic dark matter halos: From anisotropic fluids in general relativity to Horava-Lifshitz gravity
A GR Hamiltonian deformation produces an anisotropic fluid that cannot flatten rotation curves, while Horava-Lifshitz produces the right dark-matter scaling only for an imposed power-law LTB ansatz with tight paramete...
-
Inhomogeneous model with a space dependent Cosmological Constant
An inhomogeneous Lemaitre model with a space-dependent cosmological constant and a unified dark fluid can reproduce the local and early-universe Hubble constants and generates testable predictions for expansion rates ...
Discussion (0). Continue with ORCID to comment.