REVIEW 3 cited by
Viable cosmological solutions in massive bimetric gravity
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
Signed reviews
abstract
We find the general conditions for viable cosmological solution at the background level in bigravity models. Furthermore, we constrain the parameters by comparing to the Union 2.1 supernovae catalog and identify, in some cases analytically, the best fit parameter or the degeneracy curve among pairs of parameters. We point out that a bimetric model with a single free parameter predicts a simple relation between the equation of state and the density parameter, fits well the supernovae data and is a valid and testable alternative to $\Lambda$CDM. Additionally, we identify the conditions for a phantom behavior and show that viable bimetric cosmologies cannot cross the phantom divide.
Forward citations
Cited by 3 Pith papers
-
A new look at multi-gravity and dimensional deconstruction
Keeping the lapse free in deconstruction yields scalar-tensor multi-gravity, which reproduces 5D Randall-Sundrum brane cosmology equations in the continuum limit.
-
Hamiltonian formalism of the ghost free Tri(-Multi)gravity theory
A Hamiltonian constraint analysis of tri-gravity and multi-gravity claims ghost-free theories with 5N-3 degrees of freedom, provided one imposes an extra set of constraints.
-
Dynamical Dark Energy Emerges from Massive Gravity
Bigravity with a graviton mass near 4e-33 eV reproduces the DESI-hinted evolving dark energy and is claimed to fit combined cosmological data better than LambdaCDM.
Discussion (0). Continue with ORCID to comment.